“…Among others, we can mention multipactor effects in space-borne RF devices [1], [2], multipactor in RF-vacuum windows [3], [4], multiplication processes in photomultipliers and multichannel plates [5], electron microscopy techniques [6], [7], charging effects on spacecraft surfaces [8], [9] and dust grain charging in space plasmas [10]. A detailed description of electron emission under electron bombardment should cover the energy and angular dependence of the different contributions to the electron emission yield (secondaries, elastically and inelastically backscattered electrons) and their spectral and angular distributions.…”