MAIN FEATURES OF ELECTRON-CYCLOTRON-RESONANCE ION-SOURCE VACUUM-SYSTEMS

This article presents the main features in the design of vacuum system s for electron cyclotron resonance (ECR) ion sources. It is very inter esting to consider them as a possible source of high-charge-state ions in upgrading present heavy-particle accelerators. Scaling relationshi ps are given as a basis for understanding the vacuum configurations of ECR ion sources. The relevance of gas desorption effects to vacuum eq uilibrium and stability is also pointed out. Ion-induced pressure inst ability, a model of hydrogen diffusion, and the influence of neutral g ases on the vacuum stability of ECR ion sources are discussed.