摘要: Neutral Particle Analyzer (NPA) is one of the crucial diagnostic devices on Tokamak facilities. Stripping unit is one of the main parts of the NPA. A windowless gas stripping room with two differential pipes is adopted in a parallel direction of electric and magnetic fields (E//B) NPA. The pressure distributions in the stripping chamber are simulated by Ansys Fluent together with MolFlow+. Based on the pressure distributions extracted from the simulation, the stripping efficiency of the E//B NPA is studied with GEANT4. The hadron reaction physics is modified to track the charge state of each particle in a cross section base method in GEANT4. The transmission rates ($R$) and the stripping efficiencies $f_{+1}$ are examined for the particle energy ranging from 20 to 200 keV at the input pressure ($P_0$) ranging from 20 to 400 Pa. According to the combined global efficiency, $R \times f_{+1}$, $P_0$ = 240 Pa is obtained as the optimum pressure for the maximum global efficiency in the incident energy range investigated.
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来自:
林炜平
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分类:
物理学
>>
核物理学
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投稿状态:
未投稿
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引用:
ChinaXiv:202307.00132
(或此版本
ChinaXiv:202307.00132V1)
DOI:10.12074/202307.00132V1
CSTR:32003.36.ChinaXiv.202307.00132.V1
- 推荐引用方式:
Yuan Luo,Wei-Ping Lin,Pei-Pei Ren,Guo-Feng Qu,Jing-Jun Zhu,Xing-Quan Liu,Xiao-Bing Lu,Zhu An,Roy Wada,Lin-Ge Zang,Yu-Fan Qu,Zhong-Bing Sh.(2023).A simulation study of a windowless gas stripping room in an E//B neutral particle analyzer.中国科学院科技论文预发布平台.doi:10.12074/202307.00132V1
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