electron in a plane at right angles to the bending plane of the bending magnets i e if we consider the oscillating movement of the electrons in a transverse direction the recoil force can be divided into two components in the manner apparent from fig5 the component r11 is compensated in the cavity 15 in which the energy loss of the particle is compensated the components r u22a5 is always counterdirected to the particle movement and thus attenuates the oscillation energy of the electron in the transverse direction the attenuation time is typically in the order of magnitude ms the attenuation makes itself known by a contraction of the beam in the transverse direction i e in the axial direction at right angles to the bending plane of the bending magnets if the action of the recoil on a particle in the bending plane of the bending magnets is considered i e in the longitudinal direction the picture is somewhat more complicated in the horizontal plane the equilibrium orbit of the particles is a function of the electron energy the particles with greater energy have an equilibrium orbit which mostly lies outside the nominal equilibrium orbit 19 counted in relation to the septum for example if an electron releases a photon.