Development of a strongly focusing high-intensity He+ ion source for a confined alpha particle measurement at ITER

M. Kisaki, K. Shinto, T. Kobuchi, A. Okamoto, S. Kitajima, M. Sasao, K. Tsumori, M. Nishiura, O. Kaneko, Y. Matsuda, M. Wada, H. Sakakita, S. Kiyama, Y. Hirano

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Abstract

A strongly focusing high-intensity He+ ion source has been designed and constructed as a beam source for a high-energy He0 beam probe system for diagnosis of fusion produced alpha particles in the thermonuclear fusion plasmas. The He+ beam was extracted from the ion source at an acceleration voltage of 18-35 kV. Temperature distributions of the beam target were observed with an IR camera. The 1e -holding beam profile half-width was about 15 mm at optimum perveance (Perv) of 0.03 (Ibeam =2.4 A). A beam current about 3 A was achieved at an acceleration voltage of 26.7 kV with an arc power of 10 kW (Perv=0.023).

Original languageEnglish
Article number02C113
JournalReview of Scientific Instruments
Volume79
Issue number2
DOIs
Publication statusPublished - 2008 Mar 11

ASJC Scopus subject areas

  • Instrumentation

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    Kisaki, M., Shinto, K., Kobuchi, T., Okamoto, A., Kitajima, S., Sasao, M., Tsumori, K., Nishiura, M., Kaneko, O., Matsuda, Y., Wada, M., Sakakita, H., Kiyama, S., & Hirano, Y. (2008). Development of a strongly focusing high-intensity He+ ion source for a confined alpha particle measurement at ITER. Review of Scientific Instruments, 79(2), [02C113]. https://doi.org/10.1063/1.2801543