A 100 keV operation of a large vacuum‐immersed H ion source

Y. Oka, O. Kaneko, Y. Takeiri, K. Tsumori, A. Ando, E. Asano, R. Akiyama, T. Kawamoto, T. Kuroda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A large vacuum‐immersed H ion source has been operated on the negative‐ion‐based neutral beam teststand. The achieved level of the beam and the pulse duration in beam conditioning were limited by a high‐voltage breakdown in the vacuum vessel. A baffle plate at grounded potential for shielding completely from the charged particles was successful. A beam with an energy of up to 102 keV and the H ion current of 0.55 A were achieved for 0.29 s without the breakdown. The ion current of ∼1.5 A was accelerated in cesium‐seeded operation. The corresponding ion current density was ∼7 mA/cm2. A magnetic filter (as Type I LV magnetic filter) on the plasma electrode was applied. The electron beam component which was extracted from the plasma source together with H ions was found to be very reduced.

Original languageEnglish
Pages (from-to)1029-1031
Number of pages3
JournalReview of Scientific Instruments
Volume67
Issue number3
DOIs
Publication statusPublished - 1996 Mar
Externally publishedYes

Keywords

  • AMP BEAM CURRENTS
  • ELECTROSTATIC ACCELERATORS
  • HYDROGEN IONS 1 MINUS
  • ION SOURCES
  • KEV RANGE 100−1000
  • NEUTRAL ATOM BEAM INJECTION
  • PLASMA
  • VACUUM SYSTEMS

ASJC Scopus subject areas

  • Instrumentation

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    Oka, Y., Kaneko, O., Takeiri, Y., Tsumori, K., Ando, A., Asano, E., Akiyama, R., Kawamoto, T., & Kuroda, T. (1996). A 100 keV operation of a large vacuum‐immersed H ion source. Review of Scientific Instruments, 67(3), 1029-1031. https://doi.org/10.1063/1.1146747