First results of negative ion extraction with Cs for CRAFT prototype negative beam source

Yahong XIE (谢亚红); Chundong HU (胡纯栋); Jianglong WEI (韦江龙); Yongjian XU (许永建); Caichao JIANG (蒋才超); Yuming GU (顾玉明); Yuanzhe ZHAO (赵远哲); Lizhen LIANG (梁立振); Yuanlai XIE (谢远来)

doi:10.1088/2058-6272/abc46b

Plasma Science and Technology > 2021 > 23(1): 12001-012001. > DOI: 10.1088/2058-6272/abc46b

Yahong XIE (谢亚红), Chundong HU (胡纯栋), Jianglong WEI (韦江龙), Yongjian XU (许永建), Caichao JIANG (蒋才超), Yuming GU (顾玉明), Yuanzhe ZHAO (赵远哲), Lizhen LIANG (梁立振), Yuanlai XIE (谢远来). First results of negative ion extraction with Cs for CRAFT prototype negative beam source[J]. Plasma Science and Technology, 2021, 23(1): 12001-012001. DOI: 10.1088/2058-6272/abc46b

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First results of negative ion extraction with Cs for CRAFT prototype negative beam source

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China

Funds: This work was supported by the Comprehensive Research Facility for Fusion Technology Program of China (No. 2018- 000052-73-01-001228).

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Received Date: August 19, 2020
Revised Date: October 20, 2020
Accepted Date: October 22, 2020

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Abstract

Abstract

In order to understand the physics and pre-study the engineering issues for radio frequency (RF) negative beam source, a prototype source with a single driver and three-electrode accelerator was developed. Recently, the beam source was tested on the RF source test facility with RF plasma generation, negative ion production and extraction. A magnetic filter system and a Cs injection system were employed to enhance the negative ion production. As a result, a long pulse of 105 s negative ion beam with current density of 153 A m⁻² was repeatedly extracted successfully. The source pressure is 0.6 Pa and the ratio of co-extracted electron and negative ion current is around 0.3. The details of design and experimental results of beam source were shown in this letter.
- neutral beam injector,
- RF ion source,
- negative ion source,
- long pulse,
- Cs feeding

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References (21)

References

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[1]	Chundong HU (胡纯栋), Yahong XIE (谢亚红), Yongjian XU (许永建), Caichao JIANG (蒋才超), Jianglong WEI (韦江龙), Yuming GU (顾玉明), Qinglong CUI (崔庆龙), Lizhen LIANG (梁立振), Shiyong CHEN (陈世勇), Yuanlai XIE (谢远来). Achievement of 1000 s plasma generation of RF source for neutral beam injector[J]. Plasma Science and Technology, 2019, 21(2): 22001-022001. DOI: 10.1088/2058-6272/aaf1e0
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First results of negative ion extraction with Cs for CRAFT prototype negative beam source