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; A. Hatayama; Y. Okumura

doi:10.1063/1.4934613

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, A. Hatayama, Y. Okumura

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Article › peer-review

9 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 language	English
Article number	02B135
Journal	Review of Scientific Instruments
Volume	87
Issue number	2
DOIs	https://doi.org/10.1063/1.4934613
Publication status	Published - 2016 Feb 1

ASJC Scopus subject areas

Instrumentation

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10.1063/1.4934613

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title = "High current DC negative ion source for cyclotron",

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.",

author = "H. Etoh and M. Onai and Y. Aoki and H. Mitsubori and Y. Arakawa and J. Sakuraba and T. Kato and T. Mitsumoto and T. Hiasa and S. Yajima and T. Shibata and A. Hatayama and Y. Okumura",

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doi = "10.1063/1.4934613",

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T1 - High current DC negative ion source for cyclotron

AU - Etoh, H.

AU - Onai, M.

AU - Aoki, Y.

AU - Mitsubori, H.

AU - Arakawa, Y.

AU - Sakuraba, J.

AU - Kato, T.

AU - Mitsumoto, T.

AU - Hiasa, T.

AU - Yajima, S.

AU - Shibata, T.

AU - Hatayama, A.

AU - Okumura, Y.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - 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.

AB - 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.

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VL - 87

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ER -

High current DC negative ion source for cyclotron

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