Effect of plasma generation at insulator surface on transport of intense electron beam through an insulator beam guide

In our previous paper [Jpn. J. Appl. Phys. 35 (1996) L120] we presented a new feature in an intense electron beam transport system with an insulator guide. This paper presents a numerical study of the effect of plasma generation at the insulator guide surface on the transport of an intense electron beam. The plasma at the insulator surface is generated by the local electric field which is created by the beam electrons. Ion extraction from the plasma is delayed by the plasma generation time. The simulation results indicate that 1) the front of the electron beam pulse is used to generate the plasma, and 2) the electron beam transport efficiency is not totally but only slightly degraded.