Ion accumulation and space charge neutralization in intensive electron beams for ion sources and electron cooling

Abstract

Electron Beam Ion Sources (EBIS), Electron Beam Ion Traps (EBIT) and electron beams for electron cooling applications have beam parameters in the same ranges of magnitudes. EBIS and EBIT produce and accumulate ions in a beam due to electron impact ionization. The cooling electron beam accumulates positive ions from the residual gas in the accelerator chamber during the cooling cycle. Space charge neutralization of cooling beam is also used to reduce the electron energy spread and enhance the cooling ability. Advanced results of experimental investigations and theoretical models of EBIS electron beams are applied to analyze the problem of beam neutralization in electron cooling techniques.