Evaluation of diffraction effects of phase contrast imaging on HL-2A and HL-2M tokamak
作者: S.B. GongY. YuM. XuA.P. SunW.L. ZhongZ.B. ShiL. NieZ.H. WangY.F. WuB.D. YuanH. LiuZ. LiuR. KeT. LongM.Y. YeX.R. Duan
作者单位: 1School of Physics, University of Science and Technology of China, Jinzhai Road 96#, 230026, Hefei, China
2Southwestern Institute of Physics, P.O. Box 432, 610041, Chengdu, China
刊名: Journal of Instrumentation, 2018, Vol.13 (10)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1748-0221/13/10/P10016
原始语种摘要: Diffraction effects of diagnostic windows and a phase plate are evaluated in sets of phase contrast imaging (PCI) systems on HL-2A tokamak. Results show that wave field of an incident laser with shorter wavelength is less effected by diffraction. The diameter of viewing windows for PCI is asked to be larger than 50 mm to eliminate diffraction effect, implying the defection of the traditional PCI diagnostic with 10.6 Μm CO2 laser based on the viewing port with an inner diameter of 35 mm. This investigation promises a remarkable anti-diffraction performance for PCI diagnostics on the constructing HL-2M tokamak, which reserves a pair of diagnostic windows with an inner diameter of 80 mm. Evaluation of response to the phase plate indicates that the signal response and the laser beam width are...
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  • tokamak 托卡马克
  • diffraction 衍射
  • imaging 图像形成
  • viewing 观察
  • diagnostics 诊断学
  • width 幅度
  • diameter 直径
  • phase 相位
  • laser 激光
  • investigation 研究