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Yang Y, Wei J, Xie J, Gu Y, Xie Y, Hu C. Suppression of stray electrons in the negative ion accelerator of CRAFT NNBI test facility. NUCLEAR ENGINEERING AND TECHNOLOGY 2022. [DOI: 10.1016/j.net.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Tsunematsu T, Seki M, Tsuji H, Okuno K, Kato T, Shibanuma K, Hanada M, Watanabe K, Sakamoto K, Imai T, Ezato K, Akiba M. ITER Activities in Japan. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst02-a214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Toshihide Tsunematsu
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Masahiro Seki
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Hiroshi Tsuji
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Kiyoshi Okuno
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Takashi Kato
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Kiyoshi Shibanuma
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Masaya Hanada
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Kazuhiro Watanabe
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Keishi Sakamoto
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Tsuyoshi Imai
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Koichiro Ezato
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
| | - Masato Akiba
- Japan Atomic Energy Research Institute, Naka Fusion Research Establishment 801-1, Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken 311-0193, Japan
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Rouleau G, Geros E, Stelzer J, Chacon-Golcher E, Keller R, Tarvainen O, Borden M. Tungsten filament material and cesium dynamic equilibrium effects on a surface converter ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02A514. [PMID: 18315135 DOI: 10.1063/1.2819327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present results on two different aspects that affect surface converter H(-) ion source performance: tungsten filament material and converter/wall temperature control. On the tungsten material aspect, evidence that filament grain size affects the source performance as well as filament failure modes is shown. Materials with impurity contents that hinder grain growth during conditioning or operation are to be avoided in order to increase the filament lifetime. Regarding the temperature control of the converter and plasma chamber walls, we present results of increased current output of up to 2.5 mA (15%). This is explained by generating increased cesium vapor pressure leading to enhanced sputtering of H(-) ions.
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Affiliation(s)
- G Rouleau
- Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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