Shadowing effects on multi-step Langmuir probe array on HL-2A tokamak
作者: R. KeM. XuL. NieZ. GaoY. WuB. YuanJ. ChenX. SongL. YanX. Duan
作者单位: 1Department of Engineering Physics, Tsinghua University, Beijing 100084, China
2Southwestern Institute of Physics, Chengdu 610041, China
3University of Science & Technology of China, Hefei 230027, China
刊名: Journal of Instrumentation, 2018, Vol.13 (05)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1748-0221/13/05/P05027
原始语种摘要: Multi-step Langmuir probe arrays have been designed and installed on the HL-2A tokamak [1]–[2] to study the turbulent transport in the edge plasma, especially for the measurement of poloidal momentum flux, Reynolds stress Rs . However, except the probe tips on the top step, all other tips on lower steps are shadowed by graphite skeleton. It is necessary to estimate the shadowing effects on equilibrium and fluctuation measurement. In this paper, comparison of shadowed tips to unshadowed ones is presented. The results show that shadowing can strongly reduce the ion and electron effective collection area. However, its effect is negligible for the turbulence intensity and coherence measurement, confirming that the multi-step LP array is proper for the turbulent transport measurement.
全文获取路径: IOP  (合作)

  • shadowed 附有阴影
  • tokamak 托卡马克
  • probe 探针
  • measurement 测量
  • effects 海员自身物品
  • proper 合适的
  • shadowing 荫蔽
  • except 除以外
  • transport 输运
  • estimate 估计