Phase Contrast Imaging on the HL-2A Tokamak

POSTER

Abstract

In this article we present the design of a phase contrast imaging (PCI) system on the HL-2A tokamak. This diagnostic is developed to infer line integrated plasma density fluctuations by measuring the phase shift of an expanded CO$_{\mathrm{2}}$ laser beam passing through magnetically confined high temperature plasmas. This system is designed to diagnose plasma density fluctuations with the maximum wavenumber of 66 cm$^{\mathrm{-1}}$. The designed wavenumber resolution is 2.09cm$^{\mathrm{-1}}$, and the time resolution is higher than 0.2 $\mu $s. The broad $k\rho_{s} $ ranging from 0.34 to 13.37 makes it suitable for turbulence measurement. An upgraded PCI system is also discussed, which is designed for the HL-2M tokamak.

*Supported by the National Magnetic Confinement Fusion Energy Research Project (Grant No. 2015GB120002), the National Natural Science Foundation of China (Grant No. 11375053, 11105144, 10905057, 11535013).

Authors

  • Yi Yu

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Shaobo Gong

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Min Xu

    • Southwestern Institute of Physics

  • Wei Jiang

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Wulv Zhong

    • Southwestern Institute of Physics

  • Zhongbin Shi

    • Southwestern Institute of Physics

  • Huajie Wang

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Yifan Wu

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Boda Yuan

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Tao Lan

    • University of Science and Technology of China
    • Department of Modern Physics, University of Science and Technology of China

  • Minyou Ye

    • School of Nuclear Science and Technology, University of Science and Technology of China

  • Xuru Duan

    • Southwestern Institute of Physics