Some design considerations on using modulated intense annular electron beams for particle acceleration

摘要

The spacehyphen;charge wave and the stability of an intense annular electron beam propagating in a metallic pipe are examined. It is shown that the beam can propagate stably in the parameter regime of some proposed experiments where such a beam is used to generate an electromagnetic wake for particle acceleration. Modulation of an intense beam with a large diameter appears promising at high frequencies.