Study of argon impurity transport by X-ray imaging crystal spectrometer on J-TEXT

POSTER

Abstract

A tangential X-ray imaging crystal spectrometer (XICS) has been designed to receive emissions of Ar XVII from −13 cm to +13 cm region with a spatial resolution of 1.8 cm in the vertical direction on J-TEXT. The temporal evolution of argon impurity density profiles after an argon gas puff could be observed with a time resolution of up to 2 ms. The emissions of Ar XVII can be modulated by the resonant magnetic perturbations (RMPs) which indicates that the transport of argon is affected by the RMPs significantly. The 2/1 RMPs can lead to field penetration with enough RMPs amplitude. The XICS provides a tool for the study of the transport of argon impurities during the penetration of RMPs. During the field penetration phase, the emissions of Ar XVII decreased. The phenomena show that the transport of argon impurity in the core region has been enhanced during the field penetration phase. STRAHL can give the ratio between D and v profiles for the argon. The result shows that the argon is moving towards the core by the convection.

*the National Natural Science Foundation of China (Nos. 11775089, 71762031); the National Magnetic Confinement Fusion Science Program (Nos. 2015GB111002, 2014GB118000).

Presenters

  • Wei Yan

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science and Technology

Authors

  • Wei Yan

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science and Technology

  • Zhongyong Chen

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science & Technology
    • Huazhong University of Science and Technology
    • Huazhong University of Science and Technology, Huazhong University of Science and Technology

  • Xiaolong Zhang

    • Shenzhen University

  • Zhifeng Cheng

    • Huazhong University of Science and Technology

  • Rui hai Tong

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science & Technology
    • Huazhong University of Science and Technology

  • Yunong Wei

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science & Technology
    • Huazhong University of Science and Technology

  • Zhifang Lin

    • International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and
    • Huazhong University of Science & Technology
    • Huazhong University of Science and Technology