Longitudinal expansion of spacehyphen;charge dominated drifting beam bunches with a parabolic line charge density distribution

摘要

An experiment was performed for the first time to demonstrate linear longitudinal spacehyphen;charge forces on drifting electron beam bunches with a parabolic line charge density distribution. The parabolic electron beam bunch was produced by a gridded electron gun and guided into a short transport channel consisting of an induction acceleration module and three matching lenses. The timehyphen;resolved beam energy was measured at the end of the channel by both a retarding field energy analyzer and a deflecting field energy analyzer. The experimental results were compared with theory and good agreement was found.