Effect of high energy electrons on H- production and destruction in a high current DC negative ion source for cyclotron

M. Onai, H. Etoh, Y. Aoki, T. Shibata, S. Mattei, S. Fujita, Akiyoshi Hatayama, J. Lettry

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Recently, a filament driven multi-cusp negative ion source has been developed for proton cyclotrons in medical applications. In this study, numerical modeling of the filament arc-discharge source plasma has been done with kinetic modeling of electrons in the ion source plasmas by the multi-cusp arc-discharge code and zero dimensional rate equations for hydrogen molecules and negative ions. In this paper, main focus is placed on the effects of the arc-discharge power on the electron energy distribution function and the resultant H- production. The modelling results reasonably explains the dependence of the H- extraction current on the arc-discharge power in the experiments.

Original languageEnglish
Article number02B127
JournalReview of Scientific Instruments
Volume87
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

ASJC Scopus subject areas

  • Instrumentation

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    Onai, M., Etoh, H., Aoki, Y., Shibata, T., Mattei, S., Fujita, S., Hatayama, A., & Lettry, J. (2016). Effect of high energy electrons on H- production and destruction in a high current DC negative ion source for cyclotron. Review of Scientific Instruments, 87(2), [02B127]. https://doi.org/10.1063/1.4934846