  We present spectroscopic measurements and detailed theoretical analysis of
inner-shell LMn and LNn (n $\geq$ 4) dielectronic resonances in highly-charged
M-shell ions of tungsten. The x-ray emission from W$^{49+}$ through W$^{64+}$
was recorded at the electron beam ion trap (EBIT) facility at the National
Institute of Standards and Technology (NIST) with a high-purity Ge detector for
electron beam energies between 6.8 keV and 10.8 keV. The measured spectra
clearly show the presence of strong resonance features as well as direct
excitation spectral lines. The analysis of the recorded spectra with
large-scale collisional-radiative (CR) modeling of the EBIT plasma allowed us
to unambiguously identify numerous dielectronic resonances associated with
excitations of the inner-shell 2s$_{1/2}$, 2p$_{1/2}$, and 2p$_{3/2}$
electrons.

Atomic Physics