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11 / 2021-04-02 13:18:57
Observation of Quasi-Coherent Modes Behavior by Far-forward Collective Scattering in J-TEXT Density Limit Plasmas
quasi-coherent modes,density limit disruption,far-forward collective scattering measurement
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Abstract Pending
YuHan Wang / Huazhong University of Science and Technology, Wuhan
Li Gao / Huazhong University of Science and Technology, Wuhan
Peng Shi / United Kingdom Atomic Energy Authority； Culham Centre for Fusion Energy； Culham Science Centre；Abingdon； Oxon； 0X14 3DB； United Kingdom
Hui Li / 核工业西南物理研究院
ChengShuo Shen / Huazhong University of Science and Technology, Wuhan
QingLong Yang / Huazhong University of Science and Technology, Wuhan
Zhuo Huang / Huazhong University of Science and Technology
The quasi-coherent modes (QCMs) was observed by the multi-channel three-wave polarimeter-interferometer system (POLARIS) based on the spectra analysis of density fluctuation in J-TEXT. [1] The frequency range of QCMs is 30kHz to 100kHz and located at the minor radius r about 0.45a-0.6a in the interior of plasma only in disruptive shots. The QCMs are found related to the transition of the temperature gradient mode (ITG), which are implied by the Extended Fluid Code simulation. The plasma density profile broadens and the peaking factor of current profile increases to saturation with the appearance of QCMs. The occurrence of QCMs can be proposed as a precursor of subsequent disruption.

 
Important Date

  • Conference Date

    Jul 12

    2021

    to

    Jul 15

    2021

  • Jun 20 2021

    Abstract Submission Deadline

  • Jun 25 2021

    Abstract Notification of Acceptance

  • Jul 14 2021

    Contribution Submission Deadline

  • Jul 31 2021

    Registration deadline

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Huazhong University of Science and Technology
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