Aberration of a negative ion beam caused by space charge effect

K. Miyamoto, S. Wada, A. Hatayama

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Aberrations are inevitable when the charged particle beams are extracted, accelerated, transmitted, and focused with electrostatic and magnetic fields. In this study, we investigate the aberration of a negative ion accelerator for a neutral beam injector theoretically, especially the spherical aberration caused by the negative ion beam expansion due to the space charge effect. The negative ion current density profiles with the spherical aberration are compared with those without the spherical aberration. It is found that the negative ion current density profiles in a log scale are tailed due to the spherical aberration.

Original languageEnglish
Article number02A724
JournalReview of Scientific Instruments
Volume81
Issue number2
DOIs
Publication statusPublished - 2010

ASJC Scopus subject areas

  • Instrumentation

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