Comprehensive research facility for negative ion source neutral beam injection at CRAFT:design and first  

作　　者：Jianglong WEI Yahong XIE Yuanlai XIE Caichao JIANG Yuanzhe ZHAO Yongjian XU Yuming GU Wei YI Wei LIU Lyuyang BU Dezhi YAN Zhimin LIU Sheng LIU Junjun PAN Shiyong CHEN Ling YU Qinglong CUI Shihua SONG Yuqing CHEN Ji WANG Ling LIU Shengmin PAN Bin GUO Zhigang ZHU Na WANG Junwei XIE Yuwen YANG Tengsai ZHU Lixin YANG Yufan LI Ning TANG Qianxu WANG Huihui HONG Bo LIU Yuqian LI Yang LI Yu GU Xufeng PENG Shanhu LIU Yong WU Xiancai MENG Chundong HU Lizhen LIANG 韦江龙;谢亚红;谢远来;蒋才超;赵远哲;许永建;顾玉明;邑伟;刘伟;卜铝阳;严德志;刘智民;刘胜;潘军军;陈世勇;于玲;崔庆龙;宋士花;陈玉庆;王骥;刘玲;潘圣民;郭斌;朱志刚;王娜;谢俊炜;杨宇雯;朱腾赛;杨立鑫;李玉凡;唐宁;汪谦旭;洪慧慧;刘波;李宇乾;李洋;谷语;彭旭峰;柳山虎;吴勇;孟献才;胡纯栋;梁立振

机构地区：[1]Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [2]Science Island Branch of Graduate School,University of Science and Technology of China,Hefei 230026,People’s Republic of China [3]School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,People’s Republic of China [4]School of Electrical Engineering,University of South China,Hengyang 421001,People’s Republic of China [5]School of Science,Shandong Jianzhu University,Jinan 250101,People’s Republic of China [6]School of Electronic and Information Engineering,Anhui Jianzhu University,Hefei 230022,People’s Republic of China [7]Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,People’s Republic of China

出　　处：《Plasma Science and Technology》2025年第4期1-11,共11页等离子体科学和技术(英文版)

基　　金：supported by the Comprehensive Research Facility for Fusion Technology Program of China(No.2018-000052-73-01-001228)。

摘　　要：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 ke V)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 ke V 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 highcurrent 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.

关 键 词：beam acceleration magnetic confinement fusion negative ion source neutral beam injection(Some figures may appear in colour only in the online journal) 

分 类 号：TL62[核科学技术—核技术及应用]