Exploring deuterium beam operation and the behavior of the co-extracted electron current in a negative-ion-based neutral beam injector
作者: K. IkedaK. TsumoriH. NakanoM. KisakiK. NagaokaS. KamioY. FujiwaraY. HabaM. Osakabe
作者单位: 1National Institute for Fusion Science (NIFS), National Institutes of Natural Sciences, Toki, 509-5292, Japan
2SOKENDAI (Graduate School for Advanced Studies), Toki 509-5292, Japan
3Graduate School of Science, Nagoya University, Nagoya 464-8603, Japan
刊名: Nuclear Fusion, 2019, Vol.59 (7)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/ab0fca
原始语种摘要: The achievements of the deuterium beam operation of a negative-ion-based neutral beam injector (N-NBI) in the large helical device (LHD) are reported. In beam operation in LHD-NBIs, both hydrogen (H) and deuterium (D) neutral beams were generated by changing the operation gas using the same accelerator. The maximum accelerated deuterium negative-ion current () reaches 46.2 A from two beam sources with the averaged current density being 190 A m−2 for 2 s, and the extracted electron to accelerated ion current ratio () increases to 0.39 using 5.6 V high bias voltage in the first deuterium operation in 2017. An increase of electron density in the vicinity of the plasma grid (PG) surface, which is considered the main reason for the increase of co-extracted electrons in a beam, is confirmed by...
全文获取路径: IOP 

  • operation 运算
  • deuterium 重氢
  • injector 注射器
  • current 
  • neutral 中性的
  • negative 负象
  • electron 电子
  • density 密度
  • vicinity 邻近
  • increase 增加