text:
\section{INTRODUCTION}
Nonsequential double ionization (NSDI) of atoms and molecules in a strong
infrared (IR) laser field has continued to attract considerable
interest~\cite{Becker2012} since the first observation of the knee structure
in the doubly charged ion yield curve as a function of laser intensity for
Xe atom~\cite{Huillier1983}. Up to now, it is widely accepted that the
recollision picture is responsible for the NSDI~\cite{Corkum1993}. In this
picture, one electron is released via a tunneling process, then accelerated,
and finally driven back to collide with another electron making two
electrons simultaneously ionized by the IR laser field, which is called the
collision-ionization (CI) process; whereas if the second electron is pumped
to an excited state, and then ionized subsequently by the IR laser field,
this process is called the collision-excitation-ionization (CEI). With great
advances in the study of the NSDI by many theoretical
approaches~\cite{Li2009,Hao2014,Parker2006,Chen,Ye2008,Ho2006,Mauger2010,Goreslavski2001,Goreslavskii2001,Kopold2000,Faria2005,Wang2012,Jin1,Jin2},
for example, solving the full-dimensional time-dependent Schr\"{o}dinger
equation~\cite{Parker2006}, the S-matrix
theory~\cite{Goreslavskii2001,Kopold2000,Faria2005,Hao2014,Goreslavski2001},
semiclassical~\cite{Chen,Ye2008,Li2009} and
classical~\cite{Ho2006,Mauger2010} models as well as the frequency-domain
theory~\cite{Wang2012,Jin1,Jin2}, both the CI and CEI mechanisms have been
investigated in the NSDI process. Especially in recent years, more attention
has been paid to the CEI mechanism of NSDI because it involves more complex
electron correlation dynamics and  may give rise to nontrivial NSDI
features. Indeed, a number of interesting NSDI phenomena have been observed
recently~\cite{Bergues2012,Huang2013,Zhang2015,Shaaran,Maxwell2016,Hao2014,Sun2014,Dong2016,Yuan2016,Eckart2016},
such as the cross-shaped in the correlated electron momentum distribution
from NSDI with a near-single-cycle~\cite{Bergues2012,Huang2013}, the
dependence of momentum distribution on laser intensities and
carrier-envelope phases~\cite{Shaaran,Maxwell2016}, and quantum and
depletion effects below the threshold intensity~\cite{Hao2014}, as well as
the nonstructured momentum distribution of high-Z rare-gas
atoms~\cite{Sun2014}. These results are believed to be closely related to
the CEI mechanism and further stimulate the study of NSDI process caused by
CEI.

With rapid development of free-electron laser
technology~\cite{Rosenblum2016,Shintake2008,Emma2010} and application of the
high-order harmonic generation~\cite{Popmintchev2010,Chini2014,Pan2013},
NSDI can take place in an extreme ultraviolet (XUV) laser field. Applying
XUV light source, a great progress has been made in understanding the NSDI
dynamics in this short wavelength regime~\cite{Briggs2000,Peng2015}. For
example, the virtual sequential model~\cite{Jiang2015} and the joint angular
distribution~\cite{Zhang2011,Liua2015} show the effect of the electron
correlation in the NSDI process. More recently, NSDI dynamics has been
further explored in the combined IR and XUV fields. Hu~\cite{Hu2013} first
calculated the double ionization of helium in IR+XUV two-color laser fields
by \textit{ab initio} calculation. It was found that the electron
correlation can significantly enhance the NSDI probability by controlling
the XUV laser field to excite the bound electron of He$^{+}$ ion. Liu
\textit{et al.}~\cite{Liu} investigated the dependence of joint
photoelectron angular distributions on the energy sharing of two ionized
electrons by solving the time-dependent Schr\"{o}dinger equation in full
dimensionality. It was found that the joint photoelectron angular
distribution in IR+XUV two-color laser fields is different from that in a
monochromatic XUV laser field.

With the help of formal scattering theory~\cite{Mann}, the frequency-domain
theory based on the nonperturbative quantum electrodynamics was developed by
Guo \textit{et al.}~\cite{Guo1992}. This approach has been successfully
extended to deal with the recollision processes, such as the high-order
above-threshold ionization (HATI)~\cite{Wang2007,Wang2010}, high-order
harmonic generation (HHG)~\cite{Gao2000,Fu2001} and the NSDI~\cite{Wang2012}
in a monochromatic IR laser field. One major advantage of this
frequency-domain theory is that all of the recollision processes can  be
decoupled into certain channels,  which can be further investigated
separately.  Also, the approach can save a large amount of computation time
because of its nature of time-independence. Recently, the frequency-domain
theory has been employed to investigate the above-threshold ionization (ATI)
in IR+XUV two-color laser fields~\cite{Zhang2013,Liu2015}. Furthermore, we
have studied the momentum spectrum of two ionized electrons and analyzed the
formation of momentum spectrum in the NSDI due to the CI mechanism in the
two-color laser fields~\cite{Jin1,Jin2}. In this paper, we shall extend the
frequency-domain theory to investigate the CEI mechanism of NSDI in IR+XUV
two-color laser fields. By the channel analysis, we investigate the channel
contributions to the momentum distribution of two ionized electrons as well
as the contributions of the forward and backward collisions on NSDI.
Moreover, by employing the saddle-point approximation, we obtain the energy
conservation equations satisfied by the two ionized electrons and illustrate
the formation of the momentum spectrum.

This paper is organized as follows. Section II introduces the theoretical
method. In Sec. III, we present the  numerical results and a comprehensive
analysis of them. Finally, in Sec. IV our conclusions are given. Atomic
units are used throughout unless otherwise stated.

\section{THEORETICAL METHOD}

The Hamiltonian for the system of a two-electron atom in two-color linearly
polarized laser fields with frequencies of $\omega_1$ and $\omega_2$  is
\cite{Guo1992}
\begin{equation}\label{1}
H = {H_0} +U + V,
\end{equation}
where
\begin{equation}\label{2}
{H_0} = \frac{{( - i\nabla_1 )}^2}{2} +\frac{{( - i\nabla_2 )}^2}{2}+ {\omega_1}{N_{1}} + {\omega_2}{N_{2}}
\end{equation}
is the free electron and photon energy operator for the laser-matter system.
$N_{i}$ is the photon number operator for laser field with frequency
$\omega_i$ for $i=1,2$. The Coulomb potential is $U=U_1+U_2+U_{12}$, where
$U_i$ for $i=1,2$ is the interaction potential between electron and nuclei,
and $U_{12}$ is the interaction potential between the two electrons.
Finally, the electron-photon interaction potential is $V=V_1+V_2$, where
\begin{equation}\label{3}
\begin{array}{l}
V_j=-[(-i\nabla_j)\cdot \textbf{A}_1(-\textbf{k}_1\cdot \textbf{r}_j)+(-i\nabla_j)\cdot \textbf{A}_2(-\textbf{k}_2\cdot \textbf{r}_j)] \\
 ~~~~~~~ +\frac{1}{2}[\textbf{A}_1(-\textbf{k}_1\cdot \textbf{r}_j)+\textbf{A}_2(-\textbf{k}_2\cdot \textbf{r}_j)]^2,\\
\end{array}
\end{equation}
$\textbf{A}_{s}(-\textbf{k}_{s}\cdot \textbf{r}_j)=(2V_{s} \omega_{s})^
{-1/2} ({\hat{\varepsilon}}_{s} e^{i \textbf{k}_{s}\cdot \textbf{r}_j} a_{s}
+c_.c_.)$ is the vector potential with $j=1,2$, $\textbf{k}_{s}$ is the wave
vector, $\hat{\varepsilon}_{s}$ is the polarization vector,
$a_{s}(a^{\dag}_{s})$ is the annihilation (creation) operator, and $V_{s}$
is the normalization volume of the laser field with the frequency
$\omega_{s}$ for $s=1,2$.

The transition matrix from the initial state $|\Psi_i\rangle$ to the final
state $|\Psi_f\rangle$ for a NSDI process caused by the CEI mechanism is
\cite{Wang2012}
\begin{equation}\label{4}
{T_{\rm{CEI}}} =\langle \Psi_f|V_2\frac{1}{E_f-H-i\varepsilon}U_{12}\frac{1}{E_i-H+i\varepsilon}V_1|\Psi_i\rangle.
\end{equation}
In the above, the initial state for the system is $|\Psi_i\rangle=|\Psi_{i
n_1
n_2}(\textbf{r}_1,\textbf{r}_2)\rangle=|\Phi_1(\textbf{r}_1,\textbf{r}_2)\rangle
\otimes|n_1\rangle \otimes |n_2\rangle$, where
$|\Phi_1(\textbf{r}_1,\textbf{r}_2)\rangle$ is the ground state of the atom,
and $|n_j\rangle$ is the Fock state of the laser field with the photon
number $n_j$ for $j=1,2$. The initial energy of the system is $E_i =  -
(I_{p_1}+I_{p_2}) + ({n_1} + 1/2){\omega_1} + ({n_2} + 1/2){\omega _2}$ with
$I_{p_1} (I_{p_2})$ being the first (second) ionization potential of the
atom. The final state $|\Psi_f\rangle =|\Psi_{\textbf{p}_1 \textbf{p}_2 k_1
k_2}(\textbf{r}_1,\textbf{r}_2)\rangle$ is the quantized-field Volkov state
of two electrons in a two-color laser field~\cite{Guo1992,Wang2012}
\begin{equation}\label{5}
\begin{array}{l}
{|\Psi_{\textbf{p}_1 \textbf{p}_2 k_1 k_2}(\textbf{r}_1,\textbf{r}_2)\rangle} = V_e^{ - 1} \exp\{i[(\textbf{p}_1+u_{p_1}\textbf{k}_1+u_{p_2}\textbf{k}_2)\cdot \textbf{r}_1 +(\textbf{p}_2+u_{p_1}\textbf{k}_1+u_{p_2}\textbf{k}_2)\cdot \textbf{r}_2]\}\\
  ~~~~~~~~~~~~~~\times \sum\limits_{{j_1} =  - {k_1},{j_2} =  - {k_2}}^\infty \aleph_{j_1 j_2}(\zeta_1)^{*}\exp \{-i[j_1 (\textbf{k}_1 \cdot \textbf{r}_1 +\phi_1)+j_2(\textbf{k}_2 \cdot \textbf{r}_1 +\phi_2)]\} \\
  ~~~~~~~~~~~~~~   \times \sum\limits_{{j_3} =  - {k_1}-{j_1},{j_4} =  - {k_2}-{j_2}}^\infty \aleph_{j_3 j_4}(\zeta_2)^{*}\exp \{-i[j_3 (\textbf{k}_1 \cdot \textbf{r}_2 +\phi_1)+j_4(\textbf{k}_2 \cdot \textbf{r}_2 +\phi_2)]\} \\
 ~~~~~~~~~~~~~~   \times |k_1+j_1+j_3,k_2+j_2+j_4\rangle,
 \end{array}
\end{equation}
with the energy $E_f ={\textbf{p}_1}^2/2+{\textbf{p}_2}^2/2 + ({k_1} +
1/2){\omega_1} + ({k_2} + 1/2){\omega _2}+2u_{p_1}\omega_1
+2u_{p_2}\omega_2$, where $u_{p_j}$ and $\phi_j$ are the ponderomotive
energy in units of frequency $\omega_j$ and the initial phase of the laser
field with frequency $\omega_j$ for $j=1,2$, respectively. Under the strong
field approximation, the interaction between the two ionized electrons is
ignored by assuming that the two electrons are separated far away from each
other in the final state Eq.~(\ref{5}). The possible effects of Coulomb interaction of the two electron in the final states may reduce the density distribution in the low momentum region on the momentum spectra. The term $\aleph_{\gamma_1 \gamma_2}
(\zeta _i)$ for $i=1,2$ in Eq.~(\ref{5}) is the generalized Bessel function,
which can be written as \cite{Guo1992}
\begin{equation}\label{6}
\begin{array}{l}
 {\aleph_{{\gamma_1} {\gamma_2}}}(\zeta_i) = \sum\limits_{{\gamma_3}{\gamma_4}{\gamma_5}{\gamma_6}} {{J_{ - {\gamma_1} + 2{\gamma_3} + {\gamma_5} + {\gamma_6}}}} ({\varsigma_1}){J_{ - {\gamma_2} + 2{\gamma_4} + {\gamma_5} - {\gamma_6}}}({\varsigma_2}) \\
 ~~~~~~~~~~~~~~ \times {J_{ - {\gamma_3}}}({\varsigma_3}){J_{ - {\gamma_4}}}({\varsigma_4}){J_{ - {\gamma_5}}}({\varsigma_5}){J_{ - {\gamma_6}}}({\varsigma_6}), \\
 \end{array}
\end{equation}
where
\begin{equation}\label{7}
\begin{gathered}
  {\varsigma_1} = 2\sqrt {\frac{{{u_{p_1}}}}{{{\omega_1}}}} {{\mathbf{\text{\textbf{p}}}}_i}\cdot {{\widehat{{\mathbf{\epsilon}}}}_1},~~~~~~~ {\varsigma_2} = 2\sqrt{\frac{{{u_{p_2}}}}
{{{\omega _2}}}} {{\text{\textbf{p}}}_i} \cdot {{\widehat{{\mathbf{\epsilon}}}}_2}, \hfill \\
{\varsigma_3} = \frac{1}{2}u_{p_1},~~~~~~~~~~~~~~~~~~~ {\varsigma_4} = \frac{1}{2}u_{p_2}, \hfill \\
{\varsigma_5} = 2\frac{{\sqrt {{u_{p_1}}{\omega _1}{u_{p_2}}{\omega _2}} }}
{{{\omega _1} + {\omega _2}}},~~~~~~ {\varsigma_6} = 2\frac{{\sqrt {{u_{p_1}}{\omega _1}{u_{p_2}}{\omega _2}} }}{{{\omega _1} - {\omega _2}}}, \hfill \\
\end{gathered}
\end{equation}
and $J_m (t)$ is the Bessel function of order $m$. In above expression,
$\textbf{p}_i$ is the momentum of the ionized electron, and
${{\widehat{{\mathbf{\epsilon}}}}_1}$
(${{\widehat{{\mathbf{\epsilon}}}}_2}$) is the polarization direction of the
laser's electric field with frequency $\omega_1$ ($\omega_2$).

In the CEI process, two sets of intermediate states of the atom-laser system
are assumed. One state is that an electron is ionized in a Volkov state and
the other electron is bound in the ground state of $\textmd{He}^+$ ion,
which can be expressed as $|\Psi_{\textbf{p}'_1 m_1
m_2}(\textbf{r}_1)\rangle\otimes |\Phi_1 (\textbf{r}_2)\rangle$
corresponding to the energy $E_m ={\textbf{p}'_1}^2/2 + ({m_1} +
1/2){\omega_1} + ({m_2} + 1/2){\omega _2}+u_{p_1}\omega_1
+u_{p_2}\omega_2-I_{p_2}$. The other intermediate state is that one electron
is ionized in an Volkov state and the other is at the first excited state of
$\textmd{He}^+$ ion, which can be expressed as $|\Psi_{\textbf{p}''_1 l_1
l_2}(\textbf{r}_1)\rangle\otimes |\Phi_2 (\textbf{r}_2)\rangle$
corresponding to the energy $E_l ={\textbf{p}''_1}^2/2 + ({l_1} +
1/2){\omega_1} + ({l_2} + 1/2){\omega _2}+u_{p_1}\omega_1
+u_{p_2}\omega_2-I_{p_{12}}$ with $I_{p_{12}}$ being the ionization
potential of the first excited sate of $\textmd{He}^+$ ion. In our
calculation, we find that the NSDI probability contributed by the first
excited state is much larger than that by other higher excited states.
Therefore, we only consider the contribution from the first excited state of
He$^{+}$ ion to the NSDI. $|\Psi_{\textbf{p}'_1 m_1
m_2}(\textbf{r}_1)\rangle$ and $|\Psi_{\textbf{p}''_1 l_1
l_2}(\textbf{r}_1)\rangle$ are the well-known Volkov states, which can be
written as \cite{Guo1992}
\begin{equation}\label{8}
\begin{array}{l}
 {|\Psi_{\textbf{p}_1 k_1 k_2}(\textbf{r}_1)\rangle} = V_e^{ - 1/2}\sum\limits_{{j_1} =  - {k_1},{j_2} =  - {k_2}}^\infty \exp \{i[\textbf{p}_1+(u_{p_1}-j_1)\textbf{k}_1+(u_{p_2}-j_2)\textbf{k}_2]\cdot\textbf{r}_1\} \\
 ~~~~~~~~~~~~~~~ \times \aleph_{j_1 j_2}(\zeta_1)^{*} \exp[-i(j_1\phi_1+j_2 \phi_2)]|k_1+j_1,k_2+j_2\rangle. \\
 \end{array}
\end{equation}
By applying the completeness relation of the intermediate states together with the initial and final states,  Eq.~(\ref{4}) can be rewritten as
\begin{equation}\label{9}
\begin{array}{l}
 {T_{\rm{CEI}}} = \pi^2 \sum\limits_{\textbf{p}''_1 l_1 l_2}^\infty \sum\limits_{\textbf{p}'_1 m_1 m_2}^\infty \langle \Psi_{\textbf{p}_1 \textbf{p}_2 k_1 k_2}(\textbf{r}_1,\textbf{r}_2)|V_2|\Psi_{\textbf{p}''_1 l_1 l_2}(\textbf{r}_1)\Phi_2(\textbf{r}_2)\rangle \langle \Psi_{\textbf{p}''_1 l_1 l_2}(\textbf{r}_1)\Phi_2(\textbf{r}_2)\\
 ~~~~~~~~~~~\times|U_{12}|\Psi_{\textbf{p}_1^{'} m_1 m_2}(\textbf{r}_1)\Phi_1(\textbf{r}_2)\rangle \langle \Psi_{\textbf{p}_1^{'} m_1 m_2}(\textbf{r}_1)\Phi_1(\textbf{r}_2)|V_1 |\Psi_{i n_1 n_2}(\textbf{r}_1,\textbf{r}_2) \rangle \\
 ~~~~~~~~~~~  \times \delta (E_l-E_i)  \delta (E_m-E_i) \\
 ~~~~~~~=\pi^2 \sum\limits_{\textbf{p}''_1 l_1 l_2}^\infty \sum\limits_{\textbf{p}'_1 m_1 m_2}^\infty T_{\rm{ATI2}}T_{\rm{LACE}}T_{\rm{ATI1}}\delta (E_l-E_i)  \delta (E_m-E_i),
 \end{array}
\end{equation}
where
\begin{equation}\label{901}
\begin{array}{l}
 T_{\rm{ATI1}} = \langle \Psi_{\textbf{p}'_1 m_1 m_2}(\textbf{r}_1)\Phi_1(\textbf{r}_2)| V_1 |\Psi_{i n_1 n_2}(\textbf{r}_1,\textbf{r}_2) \rangle \\
~~~~~~~~=V_e^{-1/2}[(u_{p_1}-q_1)\omega_1+(u_{p_2}-q_2)\omega_2]\aleph_{q_1q_2}(\zeta_1^{'})\Phi_1(\textbf{p}_1^{'}),
 \end{array}
\end{equation}
with $q_1=n_1-m_1$ and $q_2=n_2-m_2$ being the photon numbers absorbed by the first electron $e_1$ from the first and second laser fields. The term $T_{\rm{ATI1}}$ represents the ATI process that the first electron $e_1$ is ionized directly from the ground state of $\textmd{He}$ atom to the continuous states, which is called the ATI1 process. Here we make some approximations that the ground state $|\Phi_1(\textbf{r}_1,\textbf{r}_2)\rangle$ of an atom is a production of two hydrogen-like wave functions, and the second electron is in the ground state of He$^+$ ion when the first electron is ionized in the ATI1 process~\cite{Wang2012}. The term $T_{\rm{LACE}}=\langle \Psi_{\textbf{p}''_1 l_1 l_2}(\textbf{r}_1)\Phi_2(\textbf{r}_2)|U_{12}|\Psi_{\textbf{p}_1^{'} m_1 m_2}(\textbf{r}_1)\Phi_1(\textbf{r}_2)\rangle$ represents the laser-assisted collision excitation (LACE) process that the first ionized electron $e_1$ collides with the bound electron $e_2$ and sets it to the first excited state of $\textmd{He}^{+}$ ion. The term $T_{\rm{ATI2}}$ can be rewritten as
 \begin{equation}\label{902}
\begin{array}{l}
 T_{\rm{ATI2}} =V_e^{-1/2}\delta (\textbf{p}_1-\textbf{p}_1^{''})[(u_{p_1}-s_1)\omega_1+(u_{p_2}-s_2)\omega_2]\aleph_{s_1 s_2}(\zeta_2)\Phi_2(\textbf{p}_2),
 \end{array}
\end{equation}
 with $s_1=l_1-k_1$ and $s_2=l_2-k_2$ being the photon numbers absorbed by the second electron $e_2$ from the first and second laser fields. The term $T_{\rm{ATI2}}$ represents the ATI process of the electron $e_2$ from the first excited state of $\textmd{He}^+$ ion to the continuous states, which is called the ATI2 process. By using Eqs.~(\ref{5}) and~(\ref{8}), the transition matrix for the NSDI can be written as
\begin{equation}\label{10}
\begin{array}{l}
 {T_{\rm{CEI}}} =-4\pi^{3} V_e^{ - 2}\sum\limits_{q_1 q_2} \sum\limits_{s_1 s_2} p_1 [(u_{p_1}-s_1)\omega_1 + (u_{p_2}-s_2)\omega_2]\aleph_{s_1 s_2}(\zeta_2)\Phi_2(\textbf{p}_2)  \\
 ~~~~~~~~ \times I^{'}(\textbf{\textbf{P}}) \aleph_{d_1 d_2}(\zeta_1-\zeta_1^{'}) p_1^{'}[(u_{p_1}-q_1)\omega_1 + (u_{p_2}-q_2)\omega_2] \aleph_{q_1 q_2}(\zeta_1^{'})\Phi_1(\textbf{p}_1^{'}),   \\
 \end{array}
\end{equation}
where
\begin{equation}\label{11}
\begin{array}{l}
 {I^{'}(\textbf{P})} =\int \int d\textbf{r}_1 d\textbf{r}_2 \exp[-i(\textbf{p}_1-\textbf{p}_1^{'})\cdot \textbf{r}_1]      \\
 ~~~~~~~~~~~~ \times \Phi_2^{*}(\textbf{r}_2) U_{12} \Phi_1(\textbf{r}_2). \\
 \end{array}
\end{equation}
Here, $d_1=(n_1-q_1)-(k_1+s_1)$ and $d_2=(n_2-q_2)-(k_2+s_2)$ are the photon
numbers absorbed from the first and second laser fields in the LACE process,
$\textbf{p}_1^{'}$ is the final momentum of the first ionized electron $e_1$
in the ATI1 process, $\Phi_2(\textbf{p}_2)$ is the wavefunction of the first
excited state of He$^+$ ion in the momentum space, and
$\Phi_1(\textbf{p}_1^{'})$ is approximated by the hydrogen-like wave
function with $I_{p_1}$ in the momentum space.

\section{NUMERICAL RESULTS}

\begin{flushleft}
  \textbf{1.~The momentum spectrum and channel analysis}
\end{flushleft}

We now consider NSDI process of a helium atom exposed to the IR and XUV
two-color laser fields, where the intensities of IR and XUV laser fields are
chosen as $I_1=1.0\times10^{12}$~W/cm$^{2}$ and
$I_2=5.0\times10^{13}$~W/cm$^{2}$, and the frequency of IR lase field is
$\omega_1=1.165$~eV. The polarization directions of the IR and XUV laser
fields are the same, and the initial phases of both laser fields are set to
zero for simplicity.

Figures~\ref{fig1}(a)-(d) show the NSDI momentum spectra of two ionized
electrons parallel to the laser polarization directions through the CEI
mechanism for different frequencies of XUV laser field (a)
$\omega_2=75\omega_1$, (b) $\omega_2=47\omega_1$, (c) $\omega_2=19\omega_1$
and (d) $\omega_2=13\omega_1$. For comparison, Figs.~\ref{fig1}(e)-(h) show
the momentum spectra through the CI mechanism under the same laser field
conditions, where the calculation formula is shown in Ref.~\cite{Jin1,Jin2}.
One can see that, as the energy of XUV photon decreases, the NSDI
probability of CEI mechanism is gradually higher than the corresponding
probability of CI mechanism. These results show that: if the energy of XUV
photon is small, the ionized electron cannot obtain enough energy by
absorbing XUV photons in the ATI1 process to make the bound electron ionized
directly by collision, while this bound electron can be easily pumped to the
excited state of He$^+$ ion by the laser-assisted collision and then is
ionized from the excited state by two-color laser fields at last. Hence the
CEI mechanism makes a dominant contribution to the NSDI process when the
frequency of XUV laser field is low. For example, in the case of
$\omega_2=19\omega_1$, the NSDI probability of CEI mechanism is larger than
that of the CI mechanism by about five orders of magnitude.

Figure~\ref{fig21} shows the NSDI momentum spectra through the CEI [(a)-(c)]
and CI [(d)-(f)] mechanisms for different laser intensities
$I_1=1.0\times10^{11}$~W/cm$^{2}$, $I_2=5.0\times10^{13}$~W/cm$^{2}$
[(a),(d)], $I_1=1.0\times10^{12}$~W/cm$^{2}$, $I_2=5.0\times10^{13}$~W/cm$^{2}$
[(b),(e)] and $I_1=1.0\times10^{12}$~W/cm$^{2}$,
$I_2=5.0\times10^{12}$~W/cm$^{2}$ [(c),(f)], in the case of
$\omega_2=19\omega_1$. One can see that the CEI mechanism still makes a
major contribution to the NSDI process for different laser intensities.
Furthermore, by comparing Fig.~\ref{fig21}(b) with Figs.~\ref{fig21}(a) and
(c), it is found that the XUV laser field determines the NSDI probability
and the IR laser field plays an important role in forming the structure of
the momentum spectrum, which is consistent with the situation under the CI
mechanism, as shown in Fig.~\ref{fig21}(e) and Figs.~\ref{fig21}(d) and (f). The
momentum spectra caused by CI mechanism have been investigated in the
previous paper~\cite{Jin1,Jin2}. Therefore, we focus on the NSDI process
dominated by the CEI mechanism in this paper.

Now we take the NSDI momentum in Fig.~\ref{fig1}(c) as example for analyzing
the CEI mechanism of NSDI process. One can firstly find that the momentum
distributions are the same in all the four quadrants, which is quite
different from that for the case of CI mechanism as shown in
Fig.~\ref{fig1}(g). This can be easily understood as follows: in the CEI
process, the first electron is ionized and it excites the second electron by
collision, then the second electron is ionized by the IR and XUV laser
fields from the excited state afterwards. As a result, the final momentum of
the first ionized electron is completely independent to that of the second
electron. Additionally, the two ionized electrons are indistinguishable, so
the interference patterns hold upon the exchange of the roles of the two
electrons. Therefore the CEI mechanism can lead to the same momentum
distribution in the four quadrants. Moreover, one can find that the NSDI
momentum spectrum can be divided into two regions consisting of the high and
low ionization probabilities, where the momentum spectrum shows complex
patterns. In the following, we will focus on analysis of the structure of
these momentum spectrum.

Based on the previous work~\cite{Hu2013,Zhang2013,Liu2015,Jin1,Jin2}, we
know that the XUV laser field has a decisive effect on the ionization
process in IR and XUV two-color laser fields. Figure~\ref{fig2} shows the
momentum spectra with the atom absorbing three (a), four (b), five (c) and
six (d) XUV photons in the NSDI process. One can see that the NSDI momentum
spectrum in Fig.~\ref{fig1}(c) is attributed to the processes of the atom
absorbing four and five XUV photons, as shown in Figs.~\ref{fig2}(b)
and~\ref{fig2}(c). This is because that, the double-ionization threshold is
so high that the atom has to absorb at least four XUV photons to make the
NSDI process happen. Furthermore, the processes of the atom absorbing four
and five XUV photons separately correspond to the two regions of the high
and low ionization probabilities, which indicates that the ionization
probability rapidly decreases with the increase of the number of the XUV
photons absorbed in the NSDI process.

As we mentioned in section II, we treat the NSDI as a three-step process:
the first electron is ionized in the ATI1 process, then collides with the
bound electron and makes it jump from the ground state to the first excited
state of He$^+$ ion in the LACE process, and finally the second electron is
ionized in the ATI2 process in the IR and XUV laser fields. In all the three
steps, the XUV photons may be absorbed by the electrons. Hence we now define
the channel as $(q_2,d_2,s_2)$, where $q_2$, $d_2$ and $s_2$ are the numbers
of XUV photons absorbed by electrons in the ATI1, LACE and ATI2 processes,
respectively. Firstly, we consider the region of high ionization probability
in the NSDI spectrum, where $q_2+d_2+s_2=4$. Figures~\ref{fig3}(a)-(c)
present the channel contributions of the NSDI momentum spectra for channels
(1,2,1) (a), (2,1,1) (b), and (3,0,1) (c). The contributions of the channels
(1,0,3), (1,1,2), (2,0,2) and the channels  with the atom absorbing zero XUV
photon in the ATI (including ATI1 or ATI2) process are not shown because of
their ignorable contributions to the NSDI process. From
Figs.~\ref{fig3}(a)-(c), one can clearly see that the region of the high
ionization probability is almost attributed to the contributions of channels
(2,1,1) and (3,0,1), where the contribution of channel (2,1,1) is the
greatest. Here we notice that, the final momentum of the first ionized
electron depends on both the first ionization potential $I_{p_1}$ of helium
and also the energy difference $\Delta E$ between the ground state  and the
first excited state of He$^+$ ion in the LACE process. Therefore, the first
electron at least absorbs three XUV photons in the ATI1 and LACE processes
to overcome these energies. Since $3\omega_2-I_{p_1}-\Delta E\approx 0$, the
final momentum of the first electron for channels (2,1,1) and (3,0,1) is
close to zero. On the other hand, the final momentum of the second ionized
electron only depends on the ionization potential $I_{p_{12}}$ of the first
excited state of He$^+$ ion, so the electron absorbs one XUV photon, which
is much larger than the ionization threshold, resulting in that the final
momentum of the second ionized electron is much greater than zero, as shown
in Figs.~\ref{fig3}(b) and \ref{fig3}(c).

Based on our theory, the NSDI caused by the CEI mechanism is due to the
laser-assisted collision-excitation process; hence the direction of the
first ionized electron's momentum may be changed before and after the
collision. Particularly, if the angle between the ionized electron's momenta
before and after the collision is smaller than $\pi /2$, we call this
collision a forward collision; otherwise, if the angle is larger than $\pi
/2$, we call it a backward collision.

Figures~\ref{fig3}(d)-(f) and (g)-(i) show the contributions of forward and
backward collisions for channels (1,2,1) [(d) and (g)], (2,1,1) [(e) and
(h)] and (3,0,1) [(f) and (i)], respectively. For channel (1,2,1), where the
first electron absorbs only one XUV photon in the ATI1 process, one can see
that the contribution of the backward collision is comparable with that of
the forward collision, while the momentum distribution of backward collision
is slightly broader than that of forward collision. For channels (2,1,1) and
(3,0,1), where the first electron carries high energy after it is ionized by
absorbing two or three XUV photons in the ATI1 process, the forward
collisions make a major contribution to the NSDI.

Similarly, Figures~\ref{fig4}(a)-(e) present the channel contributions of
the atom absorbing five XUV photons, and the other channels are not shown
due to little contributions. Here there are only five channels making
contributions to the region of the low ionization probability in the NSDI
process, where the contribution of the channel (3,1,1) is the biggest.
Furthermore, one can find that channels (2,2,1), (3,1,1) and (4,0,1)
illustrate similar interference patterns, while channels (2,1,2) and (3,0,2)
show similar patterns. By comparing Figs.~\ref{fig3}(a)-(c) with
Figs.~\ref{fig4}(a)-(e), one can find that these interference patterns
depend on the XUV photons absorbed in the ATI1+LACE processes and in the
ATI2 process. In order to analyze the contributions of forward and backward
collisions to NSDI process, figures~\ref{fig4}(f)-(j) and (k)-(o) show the
NSDI momentum spectra of the forward and backward collisions. One can see
that the forward collisions make major contributions to the NSDI process,
especially for the channels (3,0,2), (3,1,1) and (4,0,1). This result
further tells us that, if the ionized electron carries enough energy to
excite the bound electron, the forward collision dominates the NSDI process.

In order to further understand the above observation, we define subchannel
as $(q_2|q_1,d_2,s_2)$ within the channel $(q_2,d_2,s_2)$, where $q_1$ is
the number of the IR photons that the first electron absorbs ($q_1>0$) or
emits ($q_1<0$) in the ATI1 process. Now the LACE can be treated as the
process that the ionized electron with a certain value of $p'_1$ collides
with the parent ion, where
$p'_1=\sqrt{2[q_2\omega_2+q_1\omega_1-I_{p_{1}}-u_{p_1}\omega_1-u_{p_2}\omega_2]}$.
In the following, we will make a detailed discussion about the contributions
of forward and backward collisions for different values of $p'_1$.

Taking the subchannels of (2$|$-2,1,1), (2$|$0,1,1), (2$|$2,1,1) and
(2$|$5,1,1) within the channel (2,1,1) as examples, we present the NSDI
momentum spectra of these subchannels in Figs.~\ref{fig5}(a)-(d). One can
see that the momentum of one of two ionized electrons increases with the
increase of IR photons absorbed by an electron in the ATI1 process.
Furthermore, we present subchannel contributions of the forward collision in
Figs.~\ref{fig5}(e)-(h) and the backward collision in
Figs.~\ref{fig5}(i)-(l) for (2$|$-2,1,1) [(e) and (i)], (2$|$0,1,1) [(f) and
(j)], (2$|$2,1,1) [(g) and (k)] and (2$|$5,1,1) [(h) and (l)]. From
Fig.~\ref{fig5}, one can see that the forward collision provides a major
contribution to the NSDI, while the backward collision provides a broad
momentum distribution with a lower probability to the NSDI. This result
indicates that the electrons absorb more IR photons in the backward
collision than that in the forward collision, since the more IR photons the
electron absorbs, the lower NSDI probability is and the larger value that
the momentum presents.

Similarly, taking the subchannels of (3$|$-5,1,1), (3$|$-2,1,1), (3$|$1,1,1)
and (3$|$5,1,1) within the channel (3,1,1) as examples, we present the NSDI
momentum spectra of these subchannels in Figs.~\ref{fig6}(a)-(d) and the
subchannel contributions of the forward collision in
Figs.~\ref{fig6}(e)-(h), while the backward collisions are not shown because
of the little contribution to the corresponding subchannel. From
Figs.~\ref{fig6}(a) to \ref{fig6}(d), it is found that the momentum of the
first ionized electron increases with the increase of the number of the IR
photons that it absorbs in the ATI1 process.  In Fig.~\ref{fig6}, one can
see that the forward collision dominates the contribution to the NSDI.
Furthermore, by comparing Fig.~\ref{fig4}(d) with Figs.~\ref{fig6}(a)-(d),
one can find that the interference pattern in Fig.~\ref{fig4}(d) is
attributed to the coherent summation of these subchannel contributions.
Moreover, comparing Fig.~\ref{fig6} with Fig.~\ref{fig5}, it is found that,
for a given $q_1$, the relative contribution of forward collision to
backward collision for (3$|q_1$,1,1) is much larger than that for
(2$|q_1$,1,1). This indicates the relative contribution of forward to
backward collisions depends largely on the energy carried by the first
ionized electron after the ATI1 process.

\begin{flushleft}
  \textbf{2.~The saddle-point approximation and energy conservation}
\end{flushleft}

We now further explain why some channels illustrate similar interference
patterns, and why the relative contribution of forward to backward
collisions varies with the energy carried by the ionized electron in the
ATI1 process, as shown in Figs.~\ref{fig3}-\ref{fig4}. We employ the
saddle-point approximation to analyze the NSDI process. As mentioned above,
the NSDI can be treated as a three-step process. Firstly, we will consider
the first-step process, i.e., the first electron is ionized in the ATI1
process. We may analyze this process through the Bessel function
$\aleph_{q_1q_2}(\zeta_1')$ in Eq.~(\ref{10}). In our calculation, the
Bessel function can be simplified as~\cite{Zhang2013}
\begin{equation}\label{12}
 \aleph_{q_1q_2}(\zeta_1')\approx J_{-q_1}(\zeta_{11}',\zeta_{13}')J_{-q_2}(\zeta_{12}'),
\end{equation}
where
\begin{equation}\label{121}
 J_{-q_1}(\zeta_{11}',\zeta_{13}')=\sum\limits_{q_3}J_{-q_1+2q_3}(\zeta_{11}')J_{-q_3}(\zeta_{13}'),
\end{equation}
and
\begin{equation}\label{13}
\begin{gathered}
  {\zeta_{11}'}=2\sqrt {\frac{{{u_{p_1}}}}{{{\omega_1}}}} {{\mathbf{\text{{p}}}}_1'}\cos \theta_1', \hfill \\
  {\zeta_{12}'}=2\sqrt {\frac{{{u_{p_2}}}}{{{\omega_2}}}} {{\mathbf{\text{p}}}_1'} \cos \theta_1', \hfill \\
  {\zeta_{13}'} = \frac{1}{2}u_{p_1}, \hfill \\
\end{gathered}
\end{equation}
with $\theta_1'$ being the angle between the momentum of the first ionized
electron and polarization directions of the two laser fields in the ATI1
process.

For a certain $q_2$, the Bessel function $J_{-q_1}(\zeta_{11}',\zeta_{13}')$
in Eq.~(\ref{12}) can be written as~\cite{Wang2007,Guo2009}
\begin{equation}\label{14}
 J_{-q_1}(\zeta_{11}',\zeta_{13}')=\frac{1}{T_1}\int_{-T_1/2} ^{T_1/2} dt\exp{\{i[\zeta_{11}'\sin(\omega_1t)+\zeta_{13}'\sin(2\omega_1t)+q_1\omega_1t]\}},
\end{equation}
where $T_1=2\pi/\omega_1$. On the other hand, the classical action of an
electron is~\cite{Jin2}
\begin{equation}\label{15}
\begin{array}{l}
S_{cl}(t,\textbf{p}) =  \frac{1}{2}\int_0 ^t dt^{'} [\textbf{p}+\textbf{A}_{cl}(t^{'})]^2 \\
 ~~~~~~~~~~~=(\frac{1}{2}\textbf{p}^2+U_{p_1})t+2\sqrt {\frac{{{u_{p}}}_1}{{{\omega_1}}}} \sin(\omega_1 t) {{\mathbf{\text{\textbf{p}}}}}\cdot {{\widehat{{\mathbf{\epsilon}}}}_1}+\frac{1}{2}u_{p_1} \sin(2\omega_1 t),\\
 \end{array}
\end{equation}
where $U_{p_1}$ is the ponderomotive energy from the IR laser field with the
vector potential $\textbf{A}_{cl}(t)$. By using Eq.~(\ref{15}) and the
energy conservation $E_i=E_m$, Eq.~(\ref{14}) becomes
\begin{equation}\label{16}
 J_{-q_1}(\zeta_{11}',\zeta_{13}')=\frac{1}{T_1}\int_{-T_1/2} ^{T_1/2} dt e^{i[f_{\textmd{ATI1}}(t)]},    \\
\end{equation}
where $f_{\textmd{ATI1}}(t)=S_{cl}(t,\textbf{p}_1')-(q_2
\omega_2-I_{p_{1}})t$. By applying the saddle-point approximation, the
saddle-point $t_1'$ satisfies $f'_{\textmd{ATI1}}(t)|_{t=t_1'}=0$, leading
to the energy conservation relationship in the ATI1 process
\begin{equation}\label{17}
 \frac{[\textbf{p}_1'+\textbf{A}_{cl}(t_1')]^{2}}{2}=q_2\omega_2-I_{p_{1}},
\end{equation}
 where $q_2$ is the number of XUV photons absorbed by the first ionized electron in the ATI1 process.

Secondly, we analyze the LACE process based on the properties of the Bessel
function $\aleph_{d_1 d_2}(\zeta_1-\zeta_1^{'})$ in Eq.~(\ref{10}). Under
the calculation condition that we use in this paper, this Bessel function
can be written as
\begin{equation}\label{18}
\aleph_{d_1 d_2}(\zeta_1-\zeta_1^{'}) = J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})J_{-d_2}(\zeta_{12}-\zeta_{12}^{'}),
\end{equation}
where
\begin{equation}\label{19}
\begin{gathered}
{\zeta_{11}}=2\sqrt {\frac{{{u_{p_1}}}}{{{\omega_1}}}} {{\mathbf{\text{{p}}}}_1} \cos \theta_1 , \\
{\zeta_{12}}=2\sqrt {\frac{{{u_{p_2}}}}{{{\omega_2}}}} {{\mathbf{\text{p}}}_1} \cos \theta_1 . \\
\end{gathered}
\end{equation}
Here, $\theta_1$ is set to zero for the final momentum of the first ionized
electron along the polarization direction of the two laser fields.

The Bessel function $J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})$ in Eq.~(\ref{18})
can also be expressed as an integral form~\cite{Wang2007,Guo2009}
\begin{equation}\label{20}
 J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})=\frac{1}{T_1}\int_{-T_1/2} ^{T_1/2} dt\exp{\{i[(\zeta_{11}-\zeta_{11}^{'})\sin(\omega_1t)+d_1\omega_1t]\}}.
\end{equation}
By using Eq.~(\ref{15}) and the energy conservation $E_m=E_l$ in the LACE
process, Eq.~(\ref{20}) can be rewritten as
\begin{equation}\label{21}
 J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})=\frac{1}{T_1}\int_{-T_1/2} ^{T_1/2} dt e^{i[f_{\textmd{LACE}}(t)]}, \\
\end{equation}
where $f_{\textmd{LACE}}(t)=\Delta S_{cl}-(d_2 \omega_2-\Delta E)t$ with
$\Delta S_{cl}= S_{cl}(t,\textbf{p}_1)-S_{cl}(t,\textbf{p}_1')$ and $\Delta
E=I_{p_{2}}-I_{p_{12}}$. Under the saddle-point approximation, this Bessel
function will further become
\begin{equation}\label{22}
\begin{array}{l}
J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})\approx \sum\limits_{t_1}\frac{1}{\sqrt{\pi}[d^2_1-(\zeta_{11}-\zeta_{11}^{'})^2]^{1/4}}  \\
~~~~~~~~~~~~~~~~~~~~\times \exp\{-i[(\zeta_{11}^{'}-\zeta_{11})\sin(\omega_1t_1)-d_1\omega_1t_1]\},
 \end{array}
\end{equation}
where the saddle-point $t_1$ satisfies
\begin{equation}\label{23}
\frac{1}{2}{[\textbf{p}_1+\textbf{A}_{cl}(t_1)]}^2=\frac{1}{2}{[\textbf{p}'_1+\textbf{A}_{cl}(t_1)]}^2+(d_2\omega_2-\Delta E),
\end{equation}
which is the energy conservation equation of the first ionized electron in
the LACE process. It shows that the collision is an inelastic process with
absorbing $d_2$ XUV photons and overcoming the energy $\Delta E$. Then, we
obtain the following equation according to Eq.~(\ref{17}) and Eq.~(\ref{23})
\begin{equation}\label{24}
\frac{1}{2}{[\textbf{p}_1+\textbf{A}_{cl}(t_1)]}^2=(q_2+d_2)\omega_2-I_p',
\end{equation}
where $I_p'=I_{p_1}+I_{p_2}-I_{p_{12}}$. This equation indicates that the
final momentum spectrum of the first electron depends on the total XUV
photons $(q_2+d_2)$ that it absorbs in the ATI1 and LACE processes. This is
the reason why the structures of the momentum spectra of the subchannels
(2,1,1) and (3,0,1) are the same.

Lastly, we will consider the third-step process, i.e., the second electron
is ionized from the first excited state of He$^+$ ion by the IR+XUV
two-color laser fields. Similarly, by analyzing the Bessel function
$\aleph_{s_1s_2}(\zeta_2)$ in Eq.~(\ref{10}) under the saddle-point
approximation,  we can also obtain the energy conservation equation
satisfied by the second electron in the ATI2 process
\begin{equation}\label{25}
 \frac{[\textbf{p}_2+\textbf{A}_{cl}(t_2)]^{2}}{2}=s_2\omega_2-I_{p_{12}},
\end{equation}
where $s_2$ is the number of XUV photons absorbed by the second ionized
electron in the ATI2 process. In the above, the $t_2$ satisfies the equation
$f'_{\textmd{ATI2}}(t)|_{t=t_2}=0$ with
$f_{\textmd{ATI2}}(t)=S_{cl}(t,\textbf{p}_2)-(s_2 \omega_2-I_{p_{12}})t$.

To explain the reason of similar interference patterns of different
channels, Fig.~\ref{fig7} presents comparisons of ATI spectra and NSDI
spectra for channel (a) (2,1,1), (b) (3,1,1) and (c) (2,1,2). To understand
the structure, we show the ATI spectra based on Eq.~(\ref{901}) and
Eq.~(\ref{902}) in Figs.~\ref{fig7}(d) and \ref{fig7}(e), respectively. In
Figs.~\ref{fig7}(d), the $I_{p_1}$ is replaced by $I'_p$ in Eq.~(\ref{901}).
From Figs.~\ref{fig7}(d) and \ref{fig7}(e), one can see that both the ATI
spectra present steplike structures~\cite{Zhang2013}. According to
Eq.~(\ref{24}), one can find that the first and second steplike structures
in Fig.~\ref{fig7}(d) are attributed to the processes of atom absorbing
three and four XUV photons under the IR laser field in the ATI1+LACE
processes, respectively. Similarly, the first and second steplike structures
in Fig.~\ref{fig7}(e) are due to the first-excited electron of He$^+$ ion
absorbing one and two XUV photons under the IR laser field in the ATI2
process, respectively. By mapping the ATI spectrum of Fig.~\ref{fig7}(d) (
Fig.~\ref{fig7}(e)) on the spectra of Figs.~\ref{fig7}(a) to \ref{fig7}(c)
with dash (solid) lines, one can see that the outline of interference
patterns of these NSDI spectra can be well reproduced by the steplike
structures in the ATI spectra, which indicates that the NSDI process caused
by the CEI mechanism can be decoupled into two ATI processes of the
ATI1+LACE and ATI2. It is the reason why Figs.~\ref{fig3}(b) and
\ref{fig3}(c) illustrate the similar interference patterns, as well as
Figs.~\ref{fig4}(b), \ref{fig4}(d) and \ref{fig4}(e) show the similar
patterns, and also Figs.~\ref{fig4}(a) and \ref{fig4}(c) exhibit same
patterns.

On the other hand, in order to further understand the contributions of
forward and backward collisions to the NSDI, as shown in
Figs.~\ref{fig3}-\ref{fig4}, we focus on the LACE process by analyzing the
Bessel function $\aleph_{d_1 d_2}(\zeta_1-\zeta_1^{'})$ in Eq.~(\ref{10}).
One can find that the Bessel function determines the probability of the LACE
process and can also be expressed as $\aleph_{d_1 d_2}(\zeta_1-\zeta_1^{'})
\propto J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})$ for the weighting factor
$J_{-d_2}(\zeta_{12}-\zeta_{12}^{'})$. Furthermore, the Bessel function
$J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})$  is proportional to $
\frac{1}{f^{1/4}}$, where $f=d^2_1-
\frac{4u_{p_1}}{\omega_1}({{\mathbf{\text{{p}}}}_1^2}+{{\mathbf{\text{{p}}}'}_1^2}\cos^2\theta_1'-2{{\mathbf{\text{{p}}}}_1}{{\mathbf{\text{{p}}}}_1'}\cos
\theta_1')$. Hence, the smaller the value of $f$ is, the larger the value
that $J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})$ can have. If $f$ infinitely goes
closer to zero and $d_1 \geq 0$, we get
\begin{equation}\label{26}
d_1=2\sqrt{\frac{u_{p_1}}{\omega_1}({{\mathbf{\text{{p}}}}_1^2}+{{\mathbf{\text{{p}}}'}_1^2}\cos^2\theta_1'-2{{\mathbf{\text{{p}}}}_1}{{\mathbf{\text{{p}}}}_1'}\cos \theta_1') }.
\end{equation}
In the above, one can see that, for the maximum value of
$J_{-d_1}(\zeta_{11}-\zeta_{11}^{'})$, $d_1$ is determined by $p_1$ and
$\theta'_1$ for a given value $p'_1$.

In the LACE process, the IR laser field may be treated as a classical field
in the saddle-point approximation. Figure~\ref{fig8} shows IR photon numbers
$d_1$ in the LACE process as a function of $p_1$, which is the momentum
value of the ionized electron after collision, and $\theta'_1$ with the
momentum value before collision $p'_1$ being (a) 0.26~a.u., (b) $1.21$~a.u.
and (c) $2.17$~a.u., where the region of $\theta'_1<\pi/2$ in each graph
represents forward collision and the region of $\theta'_1>\pi/2$ represents
backward collision. One can see that, for backward collision, the number of
the IR photons absorbed by the first electron increases as the value of
$p'_1$ increases. We have noticed that, although the atom absorbs a few IR
photons (less than 12), the total energy of these IR photons is not enough
to excite the bound electron, hence the source of the energy $\Delta E$ to
excite the bound electron comes not only from the energy transfer between
the two electrons and absorbing IR photons, but also from absorbing XUV
photons during the collision. This result is consistent with the calculated
result of Hu~\cite{Hu2013}. Furthermore, for the case of absorbing certain
number of XUV photons, the probability of the LACE process is determined by
the number of IR photons that electron absorbs. From Fig.~\ref{fig8}, it is
found that: (i) when the value of $p'_1$ is small, the numbers of the IR
photons absorbed in both the forward and backward collisions are about equal
as shown in Fig.~\ref{fig8} (a), and hence the forward and backward
collisions make a comparable contribution to the NSDI, as shown in
Figs.~\ref{fig3}(d) and \ref{fig3}(g); (ii) the number of the IR photons
absorbed in the forward collision is less than that in the backward
collision when the value of $p'_1$ becomes larger as shown in
Fig.~\ref{fig8} (b), which indicates that the forward collision makes a
major contribution to the NSDI, while the backward collision provides a
broader momentum distribution, as shown in Fig.~\ref{fig5}; (iii) when the
ionized electron carries enough energy to excite the bound electron by
collision without absorbing the XUV photons in the LACE process, the
electron absorbs much less IR photons in the forward collision than that it
does in backward collision as shown in Fig.~\ref{fig8} (c), thus the forward
collision plays a dominant role in the NSDI, as shown in Fig.~\ref{fig3}(f)
as well as Figs.~\ref{fig4}(c)and (e). To summarize the above analysis, with
increase of the value of $p'_1$, the source of the energy $\Delta E$ to
excite the bound electron changes from absorbing XUV photons to the pure
energy transfer between the two electrons in the LACE process, and hence the
forward collision gradually becomes dominant in the NSDI, as shown in
Figs.~\ref{fig3}-\ref{fig6}.

In contrast to the above results, the backward collision makes a dominant
contribution to the NSDI in the case of a monochromatic IR laser field,
which is shown in Fig.8 of Ref.~\cite{Wang2012}. Here we may notice that, in
a monochromatic IR laser field, the amplitude of the LACE process only
depends on Eq.~(\ref{20}), and hence the small value of $p'_1$ in the ATI1
process makes a crucial contribution to the NSDI. In order to explain the
difference, Fig.~\ref{fig9} shows a comparison of IR photon number $d_1$ in
the LACE process under the monochromatic IR (a) and IR+XUV two-color (b)
laser fields for $p'_1=0.26$~a.u.. The intensity and frequency of
monochromatic IR laser field in Fig.~\ref{fig9}(a) are
$I=2.2\times10^{14}$~W/cm$^{2}$ and $\omega=1.165$~eV. Figure~\ref{fig9}(b)
shows a part of Fig.~\ref{fig8}(a) for small value of $p_1$.  One can see
that, the electron absorbs more IR photons for the backward collision than
that for the forward collision in both cases, while the range of the number
of IR photons absorbed in the monochromatic IR laser field is much larger
than that in two-color laser fields. Furthermore, in Fig.~\ref{fig9}(a), one
can find that the energy obtained in the forward collision is so little that
the forward collision can not make the bound electron to be excited. On the
contrary, the electron can absorb lots of IR photons in the backward
collision, and hence the bound electron may have a chance to be excited in
the LACE process. As a result, the backward collision makes a crucial
contribution to the NSDI in the monochromatic IR laser field.

\section{CONCLUSIONS}
Based on the frequency-domain theory, we investigate the CEI mechanism of
NSDI process for a helium atom in the IR+XUV two-color laser fields. We find
that the NSDI probability of  the CEI mechanism is much larger than that of
the CI mechanism when the XUV photon energy is smaller than the ionization
threshold of He$^+$ ion. It shows that the NSDI momentum spectrum caused by
the CEI mechanism presents complex interference patterns and symmetrical
structures. With the help of channel analysis, we find that the momentum
spectrum is attributed to the interference between different channels. With
the channel number increases, the energy of the ionized electron increases
in the ATI1 process, and hence the source of the energy to excite the bound
electron changes from absorbing XUV photons to pure energy transfer between
two electrons during the LACE process. Furthermore, in order to explain the
interference pattern, we investigated the contributions to the NSDI from the
forward and backward collisions. We found that, if the energy of recolliding
electron is small, both the forward and backward collisions play comparable
roles in the NSDI, while the distribution of momentum spectrum is broader
for the backward collision than for the forward; on the other side, if the
the energy of recolliding electron is very large, the forward collision
plays a dominant role in the NSDI. Also, we employed the saddle-point
approximation to obtain the equation of energy conservation, and
reconstructed the formation of interference patterns of different channels
by the spectra of two ATI processes. In addition, we also explained the
reason why the backward collision plays a dominant role in the CEI mechanism
of NSDI under the monochromatic IR laser field.

\section*{ACKNOWLEDGMENTS}
This research was supported by the National Natural Science Foundation of
China under Grant Nos. 11474348, 61275128, 11334009 and 11425414. C. J. was
supported by the National Basic Research Program of China Grant No.
2013CB922201. Z.-C.Y. was supported by the Natural Sciences and Engineering
Research Council of Canada and by the Canadian computing facilities of
SHARCnet, and ACEnet.

redpajama_set_name: RedPajamaArXiv


FaceBook Search.....and what it means to you!
Facebook have announced that it has now completed indexing the 2 trillion posts that have been made to it's network!
In addition, it's made them searchable! So what does this mean to you as a business?
Well if you consider that billions of people spend 40 minutes of their time on FaceBook every day, and 20% of their time online is on this network......quite a lot. FaceBook's objective seems to be to position themselves as direct search rivals to Google. Their thinking seems to be if so many people are on their site, why make them navigate to Google and Bing for information? From now on, if they search for "Spain Property" on FaceBook they'll get a list of results related to this topic.....not just pages but also posts.
So if your FaceBook page has no recent activity and very few likes then that's not really going to inspire confidence in potential clients. The fact that your website looks great and has good Google positioning is irrelevant......because they may not even look at it.
I'm certainly getting more business related enquiries on FaceBook, so make sure you have mail notifications for these in place or you could miss potential client enquiries! Remember that social media activity happens in real time.....not Monday to Friday office hours! If you don't make contact promptly then somebody else will, and that's lost business.
This initiative by Facebook is without doubt a challenge to Google's authority as the world's most dominant search engine. So you can see how essential it is that you show up on these listings, because if people can find what they want on FaceBook, why would they go to Google or Bing?
It also gives potential clients the opportunity to see how you interact with enquiries posted publicly. Therefore, if your previous responses are unhelpful, or you don't even respond at all, then users are just going to go elsewhere. So in a sense, interested parties can now also evaluate you as well. It goes without saying that anything negative on there is now going to be searchable as well, so you need to ensure that nobody can post on your business page except you.
I know some of you will say that you don't like Social Media, but the fact remains that it's a very important marketing and promotional tool. And the bad news is that it's not going to go away. It's big now, and it's only going to get bigger with initiatives like this.....so don't get left behind!


Age: Handprints, footprints and of course pawprints can be taken from birth onwards!
Have your child's handprint and footprint cast in pure silver and attached to a sterling silver keyring fob.
Please note there is a possibility of keyring charms developing small scratches when coming into contact with the keys.


text:
The Price is Right Live coming to Las Cruces
Contestants can win cash, appliances, vacations and possibly even a new car participating in the on-stage travelling version.
The Price is Right Live coming to Las Cruces Contestants can win cash, appliances, vacations and possibly even a new car participating in the on-stage travelling version. Check out this story on lcsun-news.com: http://www.lcsun-news.com/story/news/local/2017/10/02/p/724137001/
Sun-News Reports, . Published 12:13 p.m. MT Oct. 2, 2017
The Price is Right Live will be on stage at the Pan American Center in Las Cruces on Jan. 22, 2018.(Photo: Courtesy)
LAS CRUCES - "Come on down" to the Pan American Center in January where you could be the next contestant on The Price is Right Live stage show.
The event will be at 7:30 p.m. Jan. 22.
"The Price is Right," the longest running game show in television history.
The on-stage travelling version coming to Las Cruces gives fans the chance to experience the same fun and winning excitement up close and in-person, said a news release announcing the event.
Contestants can win cash, appliances, vacations and possibly even a new car by playing games such as Plinko, The Big Wheel and the Showcase.
Tickets, at $35-$55, go on sale at 10 a.m. Friday, Oct. 6, at the Pan American Center Ticket Office, all Ticketmaster outlets, 800-745-3000 and Ticketmaster.com.
Read or Share this story: http://www.lcsun-news.com/story/news/local/2017/10/02/p/724137001/

redpajama_set_name: RedPajamaCommonCrawl


text:
package org.apache.camel.component.cxf.mtom;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.net.URL;

import javax.imageio.ImageIO;
import javax.xml.ws.BindingProvider;
import javax.xml.ws.Endpoint;
import javax.xml.ws.Holder;
import javax.xml.ws.soap.SOAPBinding;

import org.apache.camel.CamelContext;
import org.apache.camel.component.cxf.common.CXFTestSupport;
import org.apache.camel.cxf.mtom_feature.Hello;
import org.apache.camel.cxf.mtom_feature.HelloService;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

/**
 * Unit test for exercising MTOM enabled end-to-end router in PAYLOAD mode
 */
@ContextConfiguration
@ExtendWith(SpringExtension.class)
public class CxfMtomRouterPayloadModeTest {

    static int port1 = CXFTestSupport.getPort1();
    static int port2 = CXFTestSupport.getPort2();

    private static final Logger LOG = LoggerFactory.getLogger(CxfMtomRouterPayloadModeTest.class);

    @Autowired
    protected CamelContext context;
    private Endpoint endpoint;

    @BeforeEach
    public void setUp() throws Exception {
        endpoint = Endpoint.publish("http://localhost:" + port2 + "/"
                                    + getClass().getSimpleName() + "/jaxws-mtom/hello",
                getImpl());
        SOAPBinding binding = (SOAPBinding) endpoint.getBinding();
        binding.setMTOMEnabled(true);

    }

    @AfterEach
    public void tearDown() throws Exception {
        if (endpoint != null) {
            endpoint.stop();
        }
    }

    @Test
    public void testInvokingServiceFromCXFClient() throws Exception {
        if (MtomTestHelper.isAwtHeadless(null, LOG)) {
            return;
        }

        Holder<byte[]> photo = new Holder<>(MtomTestHelper.REQ_PHOTO_DATA);
        Holder<Image> image = new Holder<>(getImage("/java.jpg"));

        Hello port = getPort();

        SOAPBinding binding = (SOAPBinding) ((BindingProvider) port).getBinding();
        binding.setMTOMEnabled(true);

        port.detail(photo, image);

        assertArrayEquals(MtomTestHelper.RESP_PHOTO_DATA, photo.value);
        assertNotNull(image.value);
        if (image.value instanceof BufferedImage) {
            assertEquals(560, ((BufferedImage) image.value).getWidth());
            assertEquals(300, ((BufferedImage) image.value).getHeight());
        }

    }

    protected Hello getPort() {
        URL wsdl = getClass().getResource("/mtom.wsdl");
        assertNotNull(wsdl, "WSDL is null");

        HelloService service = new HelloService(wsdl, HelloService.SERVICE);
        assertNotNull(service, "Service is null");
        Hello port = service.getHelloPort();
        ((BindingProvider) port).getRequestContext()
                .put(BindingProvider.ENDPOINT_ADDRESS_PROPERTY,
                        "http://localhost:" + port1 + "/CxfMtomRouterPayloadModeTest/jaxws-mtom/hello");
        return port;
    }

    private Image getImage(String name) throws Exception {
        return ImageIO.read(getClass().getResource(name));
    }

    protected Object getImpl() {
        return new HelloImpl();
    }

}

redpajama_set_name: RedPajamaGithub


text:
theredline.com
Ordinary Guy. Super cars
About The Redline
Side-by-side: BMW M140i vs M2
Cars Fast Cars
March 24, 2018 December 27, 2018 Peter Anderson	bmw, bmw m140i, bmw m2, hot hatch
I've been wanting to a M140i vs M2 comparison even since Munich's riotous two-door joined the range a couple of years ago. The M2 is an absolute rocket and its ever-so-slight change in chassis philosophy made it a barrel of laughs the M4 never quite was. Until the M4 CS, of course. We're still rubbing our hands in anticipation of the M3 CS.
M140i vs M2
The BMW M140i is a bit of an unsung hero in the range. Idiots sniff at it not being a "real M car" – one of the YouTube commenters called me "a joke" for referring to it as such. It's part of the M Performance range that takes in a range of cars and acts as like an Audi S-Line pack or AMG add-on for "normal" cars, doing more than adding an M-Sport pack.
I put the two cars together, but not in the way everyone else does. I wanted to see what the relative strengths of the two cars were when driven side-by-side rather than "which is best."
The two cars are very similar inside – they share much the same architecture and given the 2 Series is a 1 Series in a frock, it's hardly surprising that they look the same.
The M140i's seats are 1 Series sports seats. They're a bit on the small side but do enough to hold you in while keeping you comfortable. While not much to look at, there is plenty of adjustment on offer to help you settle in and enjoy the ride.
Obviously, with the five-door version (here in Australia, we don't get to choose a three-door 1er), access to the rear seats is fairly straightforward and they're comfortable enough for short journeys. I've had a couple of kids in the back who had a whale of a time while I threw the car around rural roads, but there's no shape to hold them in. Up to six-footers will fit, but the closer they get to that height, the less comfortable they'll be.
The M2's seats aren't a great deal better to look at, but again they look after you where it counts. Getting into the rear is a bit of a drama – the front seat not really getting out of the way. Once you're in the back there's even less room than in the hatchback and the seats are flat and shapeless. Headroom is a bit of a challenge, too. If you've got young kids that can get in and out themselves, it's probably okay. As they march into teenager-hood, forget it.
Things really diverge on the outside and there are some genuine technical reasons.
The 1 Series has always been a controversially-styled car. This second-generation post-facelift is the least-dramatic but has also been the best-received. I really liked the E87, particularly with M-Sport bumpers and wheels. The surfacing was lovely and even the rear end managed to work.
The F20 was an abomination. Gone were the inventive shapes, replaced by something inexplicably ugly. The more aggressive bumper of the 135i helped lessen the blow.
The 2015 facelift brought order where there had been chaos. Better at both ends and tied to the new F22 2 Series range it's a vastly better-looking car, even if the proportions remained slightly odd.
The 2 Series, on the other hand, was pretty out of the blocks. Again, it looks better with M-Sport wheels and aero bits, but it put to rest the demons unleashed by the F20. The M2, though, well – it's different. The front and rear guards are pumped up to resemble a drift car's. The people at M had no choice – somebody convinced management that the M2's suspension had to be from the bigger M4 and there wasn't the room.
The result is something properly mean-looking. With darker wheels, it really looks the business in the near-default vivid blue. The high-ish profile tyres add some real toughness. Looks the part, is the part. BMW really does do menacing in its passenger car range Ms, unlike the mild obnoxiousness of M-pumped Xes.
Engines & Tranmissions
BMW likes to keep things fresh, so when the F20's mid-life update arrived, the 135i's 3.0-litre turbo straight six was replaced with…a 3.0-litre turbo straight six. Power rose to 250kW (340PS) in the transition to the B58 (previous cars ran the N55). The B58 also came with an appreciable jump in torque to 500Nm, up over 10 percent. Most of the changes involved the way the twin-scroll turbo worked, improved emissions and reduced friction. It's a very smooth engine and revs happily to a 7000rpm redline while making a terrific noise. I don't care how much popping and banging the AMG 2.0-litre turbo four makes, the BMW straight-six is better.
And before I'm accused of bias, I reckon the Audi twin-turbo V8 is the best-sounding engine in "normal" cars.
The M140i is available with a six-speed manual transmission or a ZF eight-speed automatic. That gearbox has to be the best auto on the market today and is installed in hugely varying types of car, from a 1.5-litre three-cylinder turbo right through to the madcap twin-turbo V8 on the new M5 (and Audi's RS6/RS7 pair).
The M2 "soldiers on" with the turbo straight-six from the M3/M4. While it's not as potent, 272kW (370PS) and 465Nm isn't messing about. And yes, those figures don't compare particularly favourably to the B58, but we'll come to that. Here in the M2, the engine is known as N55 rather than the S55 codename on the M3/M4/M4 CS.
The N55 also scores forged pistons and crankshaft to handle the thrashing and an extra oil cooler handles the higher demand.
You can choose from two transmissions – one is the same six-speed manual (with a revised linkage) from the M140i or BMW's seven-speed DCT twin-clutch. I had the DCT version – quicker to 100km/h and it's the gearbox most buyers choose.
These two cars are very different here under your backside. The M140i is obviously a 1 Series. Even a basic 1 is good fun to drive, so the work for the M Performance team wasn't hugely difficult. The M140i has adaptive damping to deliver an easy ride around town and a stiffer, flatter chassis for the fun stuff. If you want, you can spend (a lot of) money to add a mechanical LSD. Do it. If you're buying one second-hand, Quaife will supply you with an LSD too.
Sticky Michelin Pilot Sport 225/40 tyres wrap the 18-inch wheels up front while the rears are 245/35s.
The M2 is a bit of a Frankenstein car. The fatter guards hide M3/M4 suspension bits to widen the track front and rear. Between the rear wheels you will find a multi-plate limited-slip diff where the M140i is stuck with a torque-vectored unit. Michelin Pilot Super Sports connect you to the road, 245/35 up front and 265/35 at the rear, fitted to 19-inch wheels.
Unlike the M140i, the suspension is static – no adaptive dampers, just good old-fashioned springs and dampers honed with thousands of hours of testing. The track is a whopping 63mm wider up front and 69mm at the rear, but that explains the 80mm wider bodywork.
The M4's rear subframe is attached directly to the body, which means a bit more noise and a bit less comfort. Both ends feature serious bracing between the suspension towers, too.
Before we get cracking, both of these cars are absolute rockets. Anything small with 250kW-plus of power is going to demolish the benchmark 0-100km/h time (0-62mph). Both of these cars flash by in well under five seconds, so if drag-racing is your thing, there's little in it.
The M140i is clearly the softer car. There is much to like about it, though. It's the more appealing everyday car, with a comfortable ride and handling balance that you can use every day. It's not a track warrior, but in Sport mode you will demolish just about anything in its class and you will be having a ball doing it. On its own, it feels unstoppable and is without doubt more fun than a , without doubt,s rear-wheel drive chassis has the edge over all-wheel drive for driving purity, with excellent electro-nannies and a finely-judged rear end to keep you out of trouble.
The M140i is almost a best-kept secret – a modern classic and with the move to a front-wheel drive platform for the next-generation, it's also an instant classic. No other small hatchback is this fast and at this level, affordable. Sorry to my American friends, you can't have one. I wouldn't be surprised to see a healthy private import market develop over the next few years.
The M2, however, is completely off the chain. Not like the 1 Series M, which was mental, but it's just so much fun. The super-stable platform of the wider-tracked M4 suspension, stickier Super Sport tyres and stiffer everything provides thrills in the wet and dry. Despite its torque deficit, the extra potential in the chassis is super-easy to unlock and you will never fail to enjoy yourself. You can get it sideways with the electronics on to make you feel like a hero (but not too sideways), which is brilliant.
I can't stress enough how much I love the M2. It's just an amazing car. People chortle at me when I say it's responsible for the M4 CS, but I reckon it is. They feel so similar – so adjustable, so much fun. The M2's front end is so sharp but it's so forgiving – you can storm into corners with huge speed and know the rear is going to go with you. Sideways is never surprise, you're in on all the fun. It's just amazing.
But how do you choose? Watch the video…
Peter Anderson is the Editor and founder of the theredline.com.au. He's been writing about cars for years and finds it difficult to talk about anything else.
Links We Like: Audi e-tron, GLC 250 and more
Second Opinion: BMW M140i vs M2
Volkswagen T-Cross 2021 Review
January 16, 2021 January 16, 2021 Peter Anderson
One half of the T-Cross and T-Roc pair, the T-Cross is the German giant's latest -...
2021 BMW 4 Series Review
December 9, 2020 December 9, 2020 Peter Anderson
A new BMW sports car is always a good thing and when it's based on the...
Volkswagen Golf GTI TCR Review
October 29, 2020 October 29, 2020 Peter Andersongolf gti, gti, hot hatch, volkswagen
The Volkswagen Golf GTI TCR is the swansong for the Mark 7.5 (and, really, the Mark...
Hit the Redline on Twitter
© 2017-2018 The Redline


From Talca with love, the hypnotic beats of Bagre.
Lunar Tapes has become one of the best surprises of the recent years, an independent label with good musicians and interesting tunes. That's why we praise today the amusing work of Bagre, and his catchy composition of nostalgic beats. Sometimes a video game, sometimes hip-hop, sometimes a chill and awkward afternoon, "La Fantástica Distopia del Hombre Pez", his latest record, is all that. And we like it.
So, imagine you are in a very strange period in your life. Shadows get bigger, people are less people and everything seems to be a little off. But that´s OK, you know, because Bagre is still on your playlist. Every single track on "La Fantástica" gets you to another sense of security and chillness.
And if you think that`s too much, well, you can always press PLAY and get in the smooth vibe.
You can fulfill your longing of nostalgia with the cassette version of " La Fantástica Distopia del Hombre Pez" available now or the digital format. But we strongly recommend you to get your Walkman and listen to this beats, rich in 8 bit essences and futuristic melodies.
Enjoy the season of the Bagre folks, because is only getting better.


text:
PART TWO KMET: Nightmare Song, That's all Folks, Dirty Robbers, High Noon, Street Fight, What's up Doc, Alligator Wine, Baby it's Cold Outside, Leader of the Pack, Santa's Beard, My Two Front Teeth, Shotgun Boogie, 16 Tacos, Go Go Go, Help Me, I'm no Communist, Monster Mash, Christmas Balls Dec 10, 1972
(Added Jan 20, 2020)
PART ONE KMET: Snatch and Grab it, Destination Moon, On Top of old Smokey, Song of the Sewer, Three Bells, Just a Gigolo, Guy with the Voodoo, Minnie the Moocher, Pistol Packing Mama, Santa and the Purple People Eater, I Want You for Christmas, Captain Video, Chicken Walk, Taming the Tiger Dec 10, 1972
KMET PART 2: Yingle Bells, Christmas Carol, 12 Days of Christmas, Seeing Red, Fallout Shelter, Friendship, Having a Love In, Reckless, I Get a Kick out of You, Mr. Sandman, I Thought I Saw a Puddy Tat, Michael's Market, Old Sow Song, Betty Boop, I Love Onions, Lydia the Tattooed Lady, Cocktails for Two, San Francisco, Big Bear Lake Dec 3, 1972
(Added Dec 9, 2019)
KMET PART 1: William Tell Overture, Fishing Blues, Saturday Night Fish Fry, One Meatball, Big Movie Show in the Sky, Too Pooped to Pop, Genie the Magic Record, Drinking Wine Spodeodee, I Got Loaded, Cool Water, Honky Tonk Train Blues, Beat me Daddy 8 to the Bar, Boogie Woogie Bugle Boy, Minnesota Polka, North Dakota Moon Dec 3, 1972
KMET PART TWO: I'm my own Grandpa, Rat, Tarzan, Animal, Wonderful World, Born to be with You, Johnny Appleseed, Dinghy Song, Statesboro Blues, Take it Easy Greasy, Sweet Marijuana Brown, Fine & Mellow, I Got Loaded, Singing in the Bathtub, Pink Champagne (MONO ONLY) Nov 19, 1972
KMET PART ONE: Green Door, Red Rider, I'm no Communist, Talking John Birch, Frankie & Johnny, Zorro, Abba Dabba Honeymoon, It's a Gas, Hodad of the Year, Turkey Trot, Tom Joad, Dear Oakie, Route 66, East L.A., Santa Catalina, Broadway/New York, Tree (MONO ONLY) Nov 19, 1972
KMET PART 2: Rock Around the Clock, Alcoholic Blues, Birds & Bees, Let's do it, It Tickles, Scratching, Running Ragged, Baby it's Cold Outside, Wipe it off, Green Christmas, Baltimore Fire, Backwater Blues, Just a Girl men Forget, Man Smart Woman Smarter, Transfusion, Christmas Balls (MONO ONLY) Nov 26, 1972
KMET PART 1: Delicious, Trouble with Harry, Too Old to Cut the Mustard, What me Worry, Little Fly Song, Hold Tight, Davy's Dinghy, Big Noise from Winetka, Dr. Ben Casey, River Blues, Chloe, Eloise, Rhythm & Blues, Civilization, Dig, Belly up to the Bar, Nice to Get up in the Morning (MONO ONLY) Nov 26, 1972
KMET CHRISTMAS PART 2: Collegiate, Fraternity Blues, College Life, No Flies on Auntie, Monster's Holiday, Why Don't You go Home for Christmas, Jezebel, Light my Fire, Animal, Hot Nuts, Sarah in a Shoeshine Shop, It's Christmastime Once Again, Night Before Christmas, Witch's Christmas, Paralyzed, It's a Gas, Christmas Balls, Twelve Days of Christmas Dec 24, 1972
KMET CHRISTMAS PART 1: Walking to Missouri, Santa Claus is Coming to Town, Futuristic Christmas Tree, I Remember Yule, Game Plan to Beat Miami, Coming Down the Chimney, Silent Night, Christmas Dragnet, Big Noise from Winetka, Pink Champagne, Marijuana Boogie, Frosty the Snowman, Leave the Dishes in the Sink, I Want You for Christmas, I Saw Mommy do the Mambo Dec 24, 1972
KMET LIVE PART 2: Michael's Market, Watching all the Girls go By, Dragnet, Calling all Cars, I'm a Man, Wings, Turn me Loose, Just a Gigolo, Wayward Wind, Leader of the Laundromat, Surfin Bird, Hawaiian War Chant, Better Boop, Highway 61, Mojo Hand, Cocaine Habit, Over the Rainbow (MONO ONLY) Nov 5, 1972
KMET LIVE PART 1: Poisoning Pigeons in the Park, Hello Stranger, Freckle Song, They all Laughed, Kukla Fran & Ollie, Who's Gonna Win the Election, Senator Fishface, Shadow Knows, Say Man Back Again, Hurry on Down, Garbage Man, Los Angeles, Sidewalk Blues, William Tell Overture (MONO ONLY) Nov 5, 1972
KMET part 2: Uncle Josh in a Hotel, Lounging at the Waldorf, Hernando's Hideaway, St. James Infirmary, Scratching, Wait a Minute, East St. Louis Toodleoo, Baseball Boogie, Casey at the Bat, Who's on First, Alcoholic Blues, How Dry I am, Red Mountain Blues, Prowling Ground Hog, Junco Partner, Monster Mash (MONO ONLY) Oct 15, 1972
KMET part 1: Everybody Wants my Fanny, Rocking this Joint Tonight, Gotta Boogie, Mr. Hoover & Mr. Smith, Senator Fish Face, Abe Snake for President, Pale Blues, Boobs a Lot, Tuley Fog, Hooty Sapperticker, Oriental Blues, Jelly Roll's First Cousin, Bop-a-lena, Mule Skinner Blues, Bucket T, Transfusion (MONO ONLY) Oct 15, 1972
KMET PART 2: Tell me a Story, I Got Loaded, Hi-Fi Blues, Railroad Blues, Please Don't Squeeze the Banana, Keep it Clean #2, Abigail Beacher, Charlie Brown got Expelled, Campus Rules, Turkish Delight, Senator Fishface, Washington Uptight, Chaos, Bullfrog Hop, Go Go Pogo, Virginia Plain, If I Only Had a Brain, Dream (MONO ONLY) Oct 8, 1972
KMET PART 1: Mannish Boy, Half Breed, P.T.-109, Viper's Dream, Gospel Boogie, Romania, Yesterday of our Love, Eggplant Ate Chicago, X-15, I'm Thinking Tonight of my Blue Eyes, Big Hurt, Sister Honky Tonk, She Tried it Last Night, Tonight You Belong to Me, Night Time is the Right Time, Oh Johnny Oh, No Sweet Man Worth the Salt of my Tears (MONO ONLY) Oct 8, 1972
KMET LIVE 1972 PART TWO: Ten Commandments of Love, Teen Commandments, Thing, Fang, Mummy, Kansas City Kitty, Let me Bang your Box, Bragging, Machine Age, Comments for our Time, Countdown, Flying Saucer, Party Doll, White Port Lemon Juice, Cement Mixer, Masochism Tango (MONO ONLY) Oct 1, 1972
KMET LIVE 1972 PART ONE: Purple People Eater, Cumberland Mountain, Lion Sleeps Tonight, El Pizza, Jester, Stomping at the Savoy, Numbers Boogie, Black Slacks, Nicotine Scene, Abominable Snowman, You Turn me on, Pimples and Braces, Pretty Boy Floyd, Gallows Song (MONO ONLY) Oct 1, 1972
PART TWO: Sky Blue Shirt and Rainbow Tie, They're Coming to Take me Away, Monteca, I Can't Rock 'n' Roll, Admiral's Daughter, Teach me Tiger, Experiment, I Love your Pizza, Harvey's got a Girlfriend, Bad Boy, Louie Louie, Frosty the Snowman, Dolphin Club, White Port Lemon Juice, Delicious (MONO ONLY) Nov 12, 1972
PART ONE: George, Joe the Dog Faced Boy, Ain't I'm a Dog, 8th Wonder of the World, 4F Ferdinand, Molasses, Was I Drunk?, Mama Don't Allow, Pot Party, Mary Jane, Swinging on a Star, Diesel Smoke and Dangerous Curves, Top 40 News Weather & Sports, I Wanna be Evil, Treat me Rough, Masochism Tango (MONO ONLY) Nov 12, 1972
PART TWO: Teddy Bears Picnic, Pepino the Italian Mouse, Bonapart's Retreat, South Won the War, I Wonder What Amos & Andy Will do Tomorrow, Song of the Condemned, No Smokes Blues, Viper's Dream, Dinner with Drac, Teenage Brain Surgeon, Crazy Blues, Mr. Gallagher & Mr. Shean Oct 22, 1972
PART ONE: National Passtime, Pretty Girls Everywhere, Azusa, Mad Dogs And Englishmen, I Don't Know, Hang it on the Wall, Betty Boop, I Want a Bowlegged Woman, Bongo Rock, Monotonous, Walking my Cat Named Dog, She Had to Lose it at the Astor, Tight Capris, As Time Goes By, Shoot the Piano Player Oct 22, 1972
Brown Gal, Bad Boy, Long John Blues, Weirdo, Bye Bye Blackbird, Dodger Song, Split Level Head, Hoppy's Good Luck Coin, Shack Daddy, Cadillac Jack, It Should've Been Me, BONUS 1972-07-23: Smokey Joe's Cafe, All-American Boy, In a Mist, Ain't We Crazy, Nola, Mairzy Doats, TOP FIVE (MISSING #1) Mar 12, 1972
[ Play List ] [ Play List ]
PART TWO: 40 Miles of Bad Road, Big Bear Boogie, Poisoning Pigeons in the Park, Whooping Blues, Get Happy, She's Got a 60 Cycle Brain, Chicken, Start Your Engines, Nina Cocka Nina, Puddin & Tain, Cocka Mau Mau, Walter Wart, Johnny get Angry, You Ma Said You Cried in your Sleep Last Night, My Blue Heaven Sep 24, 1972
PART ONE: Chloe, Who's Gonna Win the Election, Mixed up Confusion, No Smokes Blues, Motor Head Baby, Shack Daddy, Etiquette Song, Dust Blows Forward and Back, Skinny Minnie, Fancy Nancy, Silly Dilly, G-Man Hoover, I Can Never Eat at Home Anymore, Kids, Shake Your can, East Side Story, How Much is that Doggie in the Window Sep 24, 1972
PART TWO: Dragnet, The Trial, Hanging Blues, Feetball, Football Freddy, Shake it and Take it, I Go Ape, Endless Sleep, Boogie Woogie Washer Woman, Girl Around the Corner, Free Single & Disengaged, Monolog for Pretty, When Veronica Plays the Harmonica Sep 17, 1972
(Added Jun 8, 2014)
PART ONE: Real Wild Child, Tiger Rag, Good Rocking Tonight, Sister Jenny, Rolling Stone, Cool Cool Water, St. James Infirmary, Ten Little Bottles, I'm a Country Boy, Flying Saucers Rock & Roll, Robinson Crusoe on Mars, Riding on the Elevator Railroad, Policeman's Song, St. George and the Dragonet Sep 17, 1972
KMET PART TWO: Vicksburg Blues, Ballad of Marilyn Monroe, Don't Do it Some More, World War II tribute, Smoke on the Water, Praise the Lord and Pass the Ammunition, Stalin Wasn't Stallin', Coming in on a Wing and a Prayer, Titanic, Toy Bell, Nina Cocka Nina, Rack 'em Back, Fishing Blues Sep 10, 1972
KMET PART ONE: Shiver and Shake, Willie the Chimney Sweeper, Bermuda Shorts, Locust Hill Rag, Work with me Annie, Annie's Aunt Fanny, Snatch and Grab it, St. Louis Blues, City Song, Night at Coffee Dan's, Pinetop's Boogie Woogie Sep 10, 1972
OCTOBER 1972 KMET (part two): Dad Gum Your Hide Boy, The Navy Gets the Gravy, Frankenstein Stomp, Jukebox Saturday Night, Zelda Klotz, Mopity Mope, Two to Tango, It was Awful, Taboo, Nature Boy, Serutan Yob, At My Front Door, Monster Mash, The Love Bug Will Bite You, Real Batman, Mummy, Mama Get the Hammer (MONO ONLY) Oct 29, 1972
OCTOBER 1972 KMET (part one): Close the Door, Open the Door Richard, Henry Kissinger, Countdown, I'm no Communist, Watching for the Boogie Man, Hellhound on my Trail, Aba Daba Honeymoon, Football, Looking like Something that Ain't, Mexican Joe, Tell Laura I Love Her, Come On, The Congo, Daddy Cool, Mona, Changes, I Didn't Know the Gun was Loaded (MONO ONLY) Oct 29, 1972
KMET SEPT 1972 (part 2): Christopher Columbus, Take a Whiff on Me, I Dig Rock & Roll Music, You Can't Get Away from It, Everybody Loves You, Cecilia, My Bebop Daddy, Why Don't You do me Right?, William Jennings Bryan speech, Seattle Hunch, Route 66, Down Home Special, top five Sep 3, 1972
KMET SEPT 1972 (part 1): Rock Island Line, Telstar, I Hate Music, Inka Dinka Do, Birthday Cake Polka, I'm not a Juvenile Delinquent, Tequila, El Paso, 16 Tacos, Elevator Woman, 4000 Years Ago, Donald Duck, Stein Song, Back to School One More Time, Betty Boop, I Wanna be Loved by You Sep 3, 1972
Jordan For President, Rock 'n' Roll President, Grandpa's Spells, Lounging at the Waldorf, Get Your Juices at the Deuces, Lover's Prayer, We All Scream for Ice Scream, Going to New York, Sepulveda, Los Angeles, Spike Jones Downbeat radio show, Trouble no More, Real Batman, Garbage Man (MONO ONLY) Aug 27, 1972
AUGUST/JULY 1972 KMET EXCERPTS: BLACK MUSIC OF THE '40's (August 6): The Honey Dripper, Who Threw the Whiskey in the Well, Straighten Up and Fly Right, Snatch and Grab It, EARLIEST KNOWN TOP FIVE COUNTDOWN (August 13): Chaos, The Thing, Everybody Wants my Fanny, Dr. Hackenbush, NO ANNOUNCEMENTS (July 30): Rum and Coca-Cola, Bozo and his Rocket Ship, Rumble, O Sole Mio, Surfing with Ned and Nelda (NOTE: This portion of the July 30 episode includes everything marked on the playlist as "not on aircheck" except "Bald Head" and the below July 30 portion includes the items NOT marked that way.) Aug 6, 1972
[ Play List ] [ Play List ] [ Play List ]
(Added Aug 5, 2012)
SURFIN SAFARI: Hawaiian War Chant, Let's Go Trippin', Misirlou, Surfin USA, Catch a Wave, Ride the Wild Surf, Surfer Stomp, Pipeline, Wipe Out, Golden Gate, Stagger Lee, Street Fight Jul 30, 1972
(Added Jul 1, 2012)
Don't Knock the Rock, Take a Gal like You, Hambone, Big Movie Show in the Sky, Mr. Hoover and Mr. Smith, Heavy Music, Somebody to Love, Fragile Child, I'm so Glad, Sweet like So, Playing with the Strings, Knees up Mother Brown, I'm Surfing, From me to You, Nina Cocka Nina Jun 4, 1972
INDY 500: Gentlemen Star Your Engines, Dance of the Hours, Tell Laura I Love Her, Any Ice Today Lady?, Timetable Blues, walter Wart, Blue Yodel #8 Mule Skinner Blues, Jukebox Joe, Dig, You're so Fine, Candy Man, Ain't I'm a Dog, Rich Woman May 28, 1972
Speedo, Buick 59, Rocket 69, Pot Party, Take a Whiff on Me, Pygmy Love, Can't do 60 no More, 18th Century Drawing Room, Sad Girl, Little Girl, Teenage Fair, Tobacco Auctioneer, In the Mood, Dr. Jazz, Good Night Irene May 21, 1972
(Added Apr 1, 2012)
KMET MAY 1972: Call of the Freaks, Song of the Sewer, Hot Rod Race, Hot Rod Lincoln, Sunday Driver, The Lady is a Tramp, The Boys in the Back Room, My Old Flame, Suzy Darling, Suzy Baby, Suzy Q, We Are the King's Navy, WPLJ, Jack the Ripper, Hollywood Red Riding Hood May 7, 1972
(Added Mar 4, 2012)
Let's Have A Party, Close The Door, Go Wild Little Sadie, My Babe, automobile set, Fool Fool Fool, Gospel Boogie, C C Rider, Time Machine, Man from Harlem, Straighten up and Fly Right, I'll Never Smile Again, Stripper Apr 30, 1972
(Added Feb 5, 2012)
Jumping Jive, Nicotine Scene, That's the Way We Love, Op, Cops & Robbers, Calling All Cars, 26 Miles, Shake 'em on Down, Baby Please Don't Go, Marijuana Salad #2, Pepino the Italian Mouse Apr 23, 1972
(Added Jan 1, 2012)
Black Slacks, Talking Dust Bowl, Dear Okie, Skokian, Big Bad Cadillac, 32-20 Blues, Sugar Bee, Suzy Cream Cheese, How Come my Dog Don't Bark When You Come Around?, Rocking Chair Daddy, Zelda Klotz Apr 16, 1972
Here Comes the Man with the Jive, Ducktail, When Lulu's Gone, What Killed the Dog, Barnacle Bill, Gerald McBoing Boing, Stacker Lee, The Mummy, Don't Knock the Rock, Matzoh Balls, Bucket T, Bad Motorcycle Apr 9, 1972
LIVE ON KMET: Waterloo, Moon Dawg, Flying Saucer 3rd, Jitterbugs on Parade, Duck's Yas Yas Yas, new cocaine salad, Dirty Motorcycle, The Wild One, Poppity Pop, Fever, Sleep Walk Mar 26, 1972
KMET MARCH 1972: Stepping Out, Make Yourself Comfortable, Ooh Dr. Kinsey, I Wish I Was a Car, Down by the Station, F.D.R. in Trinidad, Crazy Man Crazy, Cocka Mau Mau, Labio Dental Fricative, Chaos Mar 19, 1972
KMET FEB 1972: Nicotine Scene, Tricks Ain't Walking no More, Ling Ting Tong, Flower Children, Sally Goodin, The Cockfight, Red Rooster, Los Angeles, Blueberry Hill, Bad Boy Feb 13, 1972
FIRST SUNDAY NIGHT ON KMET: Lordy Hoody, Charged up Turned up Rock 'n' Roll Singer, Buick 59, Ambrose Part 5, Thanks for the Memory, Hot Rod Race, Hot Rod Lincoln, Milk Cow Blues, Dark Was the Night Feb 6, 1972
Live on KMET - This is the first ever Dr. Demento year-end countdown! (part 2 of above show, starting with #23) Dec 31, 1972
Live on KMET - This is the first ever Dr. Demento year-end countdown! It's a mixture of all-time classics and forgotten gems, plus a heavy dose of choice extras sprinkled in. At this time, Dr. Demento was a more laid back host, so this is not the high-energy show you're used to today. This show has been edited together from five different tapes, and as such the quality varies throughout. Special thanks to Dave & Tony Woodward for donating their tape of this show to the Dr. Demento archives. Some commercials have been included for nostalgia. MONO ONLY. Dec 31, 1972


text:
2020 NHL Playoffs Today – How Game 3 of Tampa Bay Lightning-Dallas Stars will be won
The Tampa Bay Lightning are teasing us with a potential Steven Stamkos return; could Wednesday's Game 3 be the night? In the meantime, Tampa Bay has continued its postseason-long trend of rebounding after losses (the team is now 6-0 after a loss) to tie the Stanley Cup Final, 1-1.
Meanwhile, the Dallas Stars look to reclaim the lead. To do that, they'll need to stay out of the penalty box.
Check out ESPN NHL Playoffs Today every day of the postseason until the Stanley Cup is handed out.
More: What each eliminated team should prioritize this offseason to get better.
Today's game
Game 3: Tampa Bay Lightning vs. Dallas Stars (tied 1-1) | 8 p.m.
The Stars took six penalties in Game 2, including three in the first 13 minutes, which is not ideal considering the Lightning finally got their mojo back on the power play. "It was an even game until we started taking penalties," Dallas coach Rick Bowness said on Tuesday. "It's faceoffs, turnovers and penalties — things you can't afford to do against an elite team like that."
The Stars also provided a quick injury update: Blake Comeau (who left Game 2) is still being evaluated as of Tuesday, while Ben Bishop, Stephen Johns and Radek Faksa remain unfit to play.
Stay up to date with scores, schedule, team updates and much more.
• NHL Postseason Central
• Stream full replays of every game
• More NHL content
The Lightning made lineup adjustments for Game 2, scratching both Zach Bogosian and Luke Schenn to return to a 12-forward, six-defenseman lineup — with Jan Rutta getting his first game action in six weeks, and playing in his second game since Feb. 5. "It took me a couple shifts to get into rhythm, but I think as the game went on, my game got better," Rutta said.
Lightning coach Jon Cooper generally doesn't disclose lineup decisions, so we'll know if he's sticking with the same group by warm-ups. For Bogosian and Schenn, Cooper said one scratch was a "coach's decision" while the other was "unfit to play," though he declined to elaborate on which player held what designation.
Question of the day: How much is bubble fatigue wearing on these two teams?
In reporting our bubble confidential story that was published on Tuesday, I was surprised at how candid the players were about how isolation since late July has affected their mental health.
"We love playing this sport, and I don't think there is one guy who wasn't appreciative for the chance to win the Cup this summer," one Western Conference player said. "But also, I don't think a lot of fans realize what an emotional toll the bubble took on some guys — the isolation, the grind, being away from our families and loved ones during a really stressful time to begin with. To be honest, after the first few days, I noticed a lot of guys were more down than they usually are. Some guys were legitimately sad. It's not easy living like that for two months."
The Stars and Lightning have now been playing longer than any other teams, and the Edmonton bubble specifically doesn't have the most ideal setup. Both teams are staying at the JW Marriott, which is connected to the arena via a tunnel. That means players can go days without having to set foot outside.
And since the families issue never got sorted out — there are roughly a dozen family members total, all Canadian and living in Canada, who are here for the Final — that brings an extra layer of strain.
On Tuesday, Cooper discussed how the past two months have taken a toll on him personally.
"I missed an anniversary, birthday, another one's coming up, first day of school, hockey tournaments, my daughter making the swimming team, my other daughter going to her first dance class," Cooper said. "Where do you want the list to go?"
Of course, players and coaches will say the sacrifice was worth it for the chance to hoist the Stanley Cup. But this is just a quick reminder to show compassion; although they are professional athletes making millions of dollars, they are human too. And the isolation, stress and uncertainty of 2020 hasn't been easy on anyone.
As Bowness said Tuesday: "I haven't walked on grass in eight weeks. … We're all tense. We're all wired up. You need to take that little break of dinner with your wife and go for a walk outside. … This is tough living, but there's no place we'd rather be."
"That just tells you not enough people are watching us play. The kid's a dynamic player." — Dallas coach Rick Bowness on Miro Heiskanen getting snubbed in the Norris Trophy voting. Heiskanen, however, is a Conn Smythe candidate this postseason. The defenseman leads Dallas with 23 points.
Three players to watch in Game 3
Joe Pavelski, F, Dallas Stars
With a goal in Game 2, Pavelski became the fourth player in Stanley Cup playoffs history to record 10 goals in a single postseason at age 36 or older. He joins a pretty exclusive club of Hall of Famers: Maurice "Rocket" Richard, Brett Hull and Wayne Gretzky.
Nikita Kucherov, F, Tampa Bay Lightning
Speaking of Conn Smythe, Kucherov is squarely in the race if the Lightning win the Final. The summer's leading scorer has already set the franchise record for most points in a single postseason (28), and in Game 2, the Lightning had a ridiculous 1.26-to-0.02 expected goals ratio with Kucherov on the ice, according to Natural Stat Trick.
John Klingberg, D, Dallas Stars
While Heiskanen has garnered most of the media attention this summer, Klingberg is also having a great postseason. The defenseman has three assists in the first two games of the finals, while averaging 22:38 in ice time.
Social post of the day
To hoist the #StanleyCup…
THERE IS A PRICE TO PAY. pic.twitter.com/sTXglOu9kT
— NHL (@NHL) September 22, 2020
The NHL released a new ad campaign promoting the Stanley Cup Final. The one-minute, 10-second video made its rounds on social media on Tuesday — and was immediately critiqued, as many pointed out that the video glorified injuries. The video, coincidentally, came out the same day that TSN premiered a documentary about painkiller addiction and its prevalence among some NHL players.
Madison Koekkoek — who does social media work for Hockey Canada, and whose brother is Blackhawks defenseman Slater Koekkoek — made a particularly poignant statement:
Watching videos of people's sons, husbands, brothers, Dads suffering in pain doesn't fire me up one tiny bit. Cringe.
The price to pay is hard work and determination, far more inspiring than injury.
— Madison Koekkoek (@madisonkoekkoek) September 22, 2020
← 'DWTS' first elimination and who got saved
Americans are ambivalent towards Israel-Gulf normalisation | Middle East →
Lenovo IdeaPad 1 11'' Laptop (AMD Processor, 4GB R...
HP 15s-eq1520sa 15.6" Laptop - AMD Athlon 3020e Up...
Jumper EZbook X3 Laptop Windows 10 Thin and Light ...
New Apple MacBook Pro with Apple M1 Chip (13-inch,...
£1,449.97 (as of January 11, 2021 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
New Apple MacBook Air with Apple M1 Chip (13-inch,...


Published: 21 January 2019 - 10:53 a.m.
WorldCast Systems has launched a new generation of RDS encoders with the Audemat RDS Encoder which starts shipping next month. WorldCast Systems, a pioneer in RDS Encoding said that after supplying radio stations and broadcasters with the Audemat FMB80 RDS encoder for over 25 years, the new encoders are in line with the company's standards of system versatility, ease of use, and spectral purity.
The Audemat RDS Encoder is a new, more advanced version of the FMB80 with a significant update being the addition of MPX/Composite over AES capabilities. This is the market's first RDS encoder enabling the addition of RDS information directly into a fully digital chain said WorldCast.
This ensures optimal spectral purity and quality and also enables broadcasters to easily move into a fully digital environment. Radio Data System (RDS) is a communications protocol standard for embedding digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitted, including time, station identification and program information.
In addition, Audemat RDS Encoder customers will benefit from a built-in FM Tuner for on-air monitoring of RDS information. Thus, radio stations and broadcasters can now monitor basic RDS information from a single product unit.
Advanced communications along with full control over the Audemat RDS Encoder is possible thanks to a responsive web interface allowing hands-on configuration, and SNMP management which provides users with real-time monitoring and management of Audemat RDS Encoder's operations.
Users can also control their encoder through TCP/IP and easy plug-in into any local Ethernet network. The encoders are equipped with ScriptEasy, a graphical application which can be used to configure IO's and program specific actions remotely.


text:
Home Transfers Arsenal wanted to sign me under Unai Emery - Wilfred Zaha
Arsenal wanted to sign me under Unai Emery - Wilfred Zaha
Odunayo 11:15 am Transfers,
Arsenal were in the transfer market for a winger back in 2018 and it was reported that Unai Emery identified Crystal Palace star as the main target for the team.
But it looked like the former Arsenal boss was keen on bringing Wilfred Zaha to the Emirates stadium.
At the end of the window, Arsenal changed their plan to move for Nicolas Pepe who is 24 years old.
Pepe who scored 22 goals in 38 Ligue 1 matches in the 2018-19 season made the move to the Premier League for a club record fee of 72m pounds.
Meanwhile, Crystal Palace star, Wilfred Zaha has opened up on the reason the deal didn't go through. The Ivorian revealed that he had a conversation with the former coach, Emery.
"I had a conversation with the manager. [Unai] Emery was just like, 'We don't really need to go through much'," the 28-year-old told the Greatest Game Podcast.
"He said he'd seen me play, he knows I can change games at any time and stuff like that. He was like, 'Yeah we'd love to have you' and I was just like, 'Yeah I'd love to come'.
Recall that Arsenal sacked Unai Emery in 2019 due to poor run of games which saw Mikel Arteta replace him.
Unai Emery has gone ahead to Spain to become manager of Villarreal.
Zaha added that he held a conversation with Emery and he thought the manager was convinced with his work rate for Palace.
Zaha added: "The conversation was rather straightforward because I played against him when he was manager of Arsenal. He saw what I could do, saw my work-rate, and what I could add to the team.
"Obviously, it was up to the club who they chose and they chose Pepe over me."
Tags # Transfers
By Odunayo on - 11:15 am
Tags Transfers


The New Avatar from Spice Mobiles has finally been revealed, presenting the Spice Mi-535 also called the Spice stellar Pinnacle pro. This handset is an upgraded version of its predecessor the pinnacle phablet.
Spice Mobile Facebook page created a lot of buzz recently when they posed an image with the text new avatar coming soon and now we know – it is the Spice Mi-535. The handset is priced at Rs. 14,990 and is powered by a quad core processor.
The Spice Pinnacle pro sports a 5.3 inch screen unfortunately with the qHD resolution, I am sure many were expecting a higher resolution. The RAM is of a modest 1GB with 16GB storage. Plus the microSD card slot that can add additional 32GB space.
There are dual camera a rear facing of 8 megapixel resolution and a front facing 5 megapixel camera. The Spice Pinnacle pro's front camera comes with a wide angle lens. The Mi-535 is powered by 1.2GHz quad core processor running on the Android Jelly Bean version 4.2 OS. Other features included are 3G, Wi-Fi, GPS, Bluetooth, Gesture screen lock, new feature – intelligent answer and flip to mute.
No word about when the handset will be available in the Indian market but the price will be around 14, 990.
5.3 inch capacitive touch screen with 960×540 pixels resolution.
1GB RAM, 16GB internal storage and micro SD support.
8MP rear AF camera with LED flash + front wide angle 5MP camera.
3G, Bluetooth, GPS, Wi-Fi, micro USB and 3.5mm jack.