High current DC negative ion source for cyclotron

H. Etoh, M. Onai, Y. Aoki, H. Mitsubori, Y. Arakawa, J. Sakuraba, T. Kato, T. Mitsumoto, T. Hiasa, S. Yajima, T. Shibata, Akiyoshi Hatayama, Y. Okumura

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A filament driven multi-cusp negative ion source has been developed for proton cyclotrons in medical applications. In Cs-free operation, continuous H- beam of 10 mA and D- beam of 3.3 mA were obtained stably at an arc-discharge power of 3 kW and 2.4 kW, respectively. In Cs-seeded operation, H- beam current reached 22 mA at a lower arc power of 2.6 kW with less co-extracted electron current. The optimum gas flow rate, which gives the highest H- current, was 15 sccm in the Cs-free operation, while it decreased to 4 sccm in the Cs-seeded operation. The relationship between H- production and the design/operating parameters has been also investigated by a numerical study with KEIO-MARC code, which gives a reasonable explanation to the experimental results of the H- current dependence on the arc power.

Original languageEnglish
Article number02B135
JournalReview of Scientific Instruments
Volume87
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

Fingerprint

Cyclotrons
Medical applications
Ion sources
negative ions
ion sources
cyclotrons
Flow of gases
high current
Protons
Negative ions
direct current
Flow rate
Electrons
arcs
arc discharges
beam currents
cusps
gas flow
filaments
flow velocity

ASJC Scopus subject areas

  • Instrumentation

Cite this

Etoh, H., Onai, M., Aoki, Y., Mitsubori, H., Arakawa, Y., Sakuraba, J., ... Okumura, Y. (2016). High current DC negative ion source for cyclotron. Review of Scientific Instruments, 87(2), [02B135]. https://doi.org/10.1063/1.4934613

High current DC negative ion source for cyclotron. / Etoh, H.; Onai, M.; Aoki, Y.; Mitsubori, H.; Arakawa, Y.; Sakuraba, J.; Kato, T.; Mitsumoto, T.; Hiasa, T.; Yajima, S.; Shibata, T.; Hatayama, Akiyoshi; Okumura, Y.

In: Review of Scientific Instruments, Vol. 87, No. 2, 02B135, 01.02.2016.

Research output: Contribution to journalArticle

Etoh, H, Onai, M, Aoki, Y, Mitsubori, H, Arakawa, Y, Sakuraba, J, Kato, T, Mitsumoto, T, Hiasa, T, Yajima, S, Shibata, T, Hatayama, A & Okumura, Y 2016, 'High current DC negative ion source for cyclotron', Review of Scientific Instruments, vol. 87, no. 2, 02B135. https://doi.org/10.1063/1.4934613
Etoh H, Onai M, Aoki Y, Mitsubori H, Arakawa Y, Sakuraba J et al. High current DC negative ion source for cyclotron. Review of Scientific Instruments. 2016 Feb 1;87(2). 02B135. https://doi.org/10.1063/1.4934613
Etoh, H. ; Onai, M. ; Aoki, Y. ; Mitsubori, H. ; Arakawa, Y. ; Sakuraba, J. ; Kato, T. ; Mitsumoto, T. ; Hiasa, T. ; Yajima, S. ; Shibata, T. ; Hatayama, Akiyoshi ; Okumura, Y. / High current DC negative ion source for cyclotron. In: Review of Scientific Instruments. 2016 ; Vol. 87, No. 2.
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