MONTE-CARLO SIMULATION OF ION-INDUCED KINETIC ELECTRON-EMISSION FROM A METAL-SURFACE

Proton-induced kinetic electron emission from beryllium is studied usi ng a Monte Carlo simulation. The emphasis is put on the effects of rou ghness and work function of the surface on the energy and angular dist ributions of emitted electrons as well as the electron yield. For smal l aspect ratio H/W of the bowl-structured surface, emission of low-ene rgy cascade electrons from an inclined plane causes an increase in the electron yield, whereas, for large H/W, re-entrance of emitted electr ons causes a decrease in the yield and the number of electrons emitted with oblique angles; where H and W are the depth and width of the str ucture. The dominant emission of low-energy cascade electrons causes a significant increase in the electron yield with low work function, wh ereas, with high work function, the high-energy component, as well as the low-energy one, is decreased.