Comprehensive research facility for negative ion source neutral beam injection at CRAFT: design and first operation
Abstract Neutral beam injection (NBI) has been proven as a reliable heating and current drive method for fusion plasma. For the high-energy NBI system (particle energy > 150 keV) of large-scale fusion devices, the negative ion source neutral beam injection (NNBI) system is inevitable, which can obtain an acceptable neutralization efficiency (> 55%). But the NNBI system is very complex and challengeable. To explore and master the key NNBI technology for future fusion reactor in China, an NNBI test facility is under development in the framework of the Comprehensive Research Facility for Fusion Technology (CRAFT). The initial goal of CRAFT NNBI facility is to achieve a 2 MW hydrogen neutral beam at the energy of 200–400 keV for lasting 100 s. In the first operation of the CRAFT NNBI facility, a negative ion source with dual RF drivers was developed and tested. By using the 50 keV accelerator, the long-pulse and high-current extractions of negative hydrogen ions have been achieved and the typical values were 55.4 keV, 7.3 A (~ 123 A/m 2 ), 105 s and 55.0 keV, 14.7 A (~ 248 A/m 2 ), 30 s, respectively. By using the 200 keV accelerator, the megawatt-class negative hydrogen beam has also been achieved (135.9 keV, 8.9 A, 8 s). The whole process of the gas neutralization of negative ion beam, electric removal of residual ions, and beam transport have been demonstrated experimentally.
Authors
- L. Yang (ORCID: https://orcid.org/0009-0009-2679-6303)
- Lizhen Liang (ORCID: https://orcid.org/0000-0002-5744-5727)
- Shengmin Pan
- Yong Wu (ORCID: https://orcid.org/0009-0003-1099-9188)
- Qianxu Wang (ORCID: https://orcid.org/0009-0003-2732-3125)
- Junjun Pan (ORCID: https://orcid.org/0000-0002-3669-4193)
- Zhigang Zhu (ORCID: https://orcid.org/0000-0002-0828-6168)
- Lu-Lu Bu (ORCID: https://orcid.org/0000-0001-7154-381X)
- Yuqian Li (ORCID: https://orcid.org/0000-0002-8363-4572)
- Ning Tang (ORCID: https://orcid.org/0000-0003-4702-9399)
- Junwei Xie (ORCID: https://orcid.org/0000-0002-2822-3359)
- Yuming Gu (ORCID: https://orcid.org/0000-0003-1540-9717)
- Xiancai Meng (ORCID: https://orcid.org/0000-0002-3380-1723)
- Shanhu Liu (ORCID: https://orcid.org/0000-0003-1382-7157)
- Yu Gu (ORCID: https://orcid.org/0000-0003-3165-3269)
- Caichao Jiang (ORCID: https://orcid.org/0000-0001-7378-8386)
- Der-Chung Yan
- Tingting Zhu (ORCID: https://orcid.org/0000-0003-2901-8901)
- Xufeng Peng (ORCID: https://orcid.org/0009-0002-0346-2123)
- Shiyong Chen (ORCID: https://orcid.org/0000-0002-2616-4367)
- Yufan Li (ORCID: https://orcid.org/0009-0000-6094-4132)
- Sheng Liu (ORCID: https://orcid.org/0000-0001-5644-7715)
- Yuanzhe Zhao (ORCID: https://orcid.org/0000-0003-1066-9253)
- Ji Wang (ORCID: https://orcid.org/0000-0002-0724-7538)
- Yuqing Chen (ORCID: https://orcid.org/0000-0001-7961-3210)
- Na Wang
- Wei Yi (ORCID: https://orcid.org/0000-0002-8880-6038)
- Zhimin Liu (ORCID: https://orcid.org/0000-0001-7953-7414)
- Yahong Xie
- Huihui Hong
- Bin Guo
- Yuwen Yang (ORCID: https://orcid.org/0000-0002-2837-1861)
- Yongjian Xu
- Chundong Hu (ORCID: https://orcid.org/0009-0007-1917-8799)
- Ling Yu
- Qinglong Cui
- Shihua Song
- Jianglong Wei (ORCID: https://orcid.org/0000-0002-2371-3842)
- Yang Lee
- Yuanlai Xie (ORCID: https://orcid.org/0009-0006-3734-6525)
- Бо Лю (ORCID: https://orcid.org/0000-0003-3045-628X)
- Wei Liu (ORCID: https://orcid.org/0000-0003-2018-7004)
- Ling Liu (ORCID: https://orcid.org/0009-0005-8358-8165)
Institutions
- Anhui Jianzhu University (CN)
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Hefei Institutes of Physical Science (CN)
- Institute of Plasma Physics (CN)
- East China University of Technology (CN)
- Shandong Jianzhu University (CN)
- University of South China (CN)
Publication Details
- Journal
- Plasma Science and Technology
- Published
- 2024-10-31
- DOI
- https://doi.org/10.1088/2058-6272/ad8da7
- Citations
- 16
- Primary Topic
- Particle accelerators and beam dynamics
- Type
- article
- Field-Weighted Citation Impact
- 20.78