Simulations of density limit in the J-TEXT tokamak with NIMROD
ID:22 View Protection:PUBLIC Updated Time:2021-07-13 08:15:27 Hits:88 Poster Presentation

Start Time:2021-07-12 10:20 (Asia/Shanghai)

Duration:20min

Session:[E] E-poster [E] E-poster

Abstract
Abstract: MARFE(Multifaceted asymmetric radiation from the edge), the precursor of  density limit in some observations, has been studied in the 2-D fluid model and observed in multiple tokamak experiments, as well as in the J-TEXT high density discharges with ECRH. To further understand the mechanism of MARFE, some typical density limit shots from J-TEXT are performed with the extended-MHD code called NIMROD (Sovinec et al 2004 J. Comput. Phys. 195 355). First, thermal instability of MARFE is studied. Secondly, through analyzing the time evolution of MARFE, the plasma behaviors and mechanism of density limit disruption are investigated. Finally, the influence of configuration optimization on the density limit in J-TEXT high density discharges is discussed.
 
Keywords
MARFE;MHD instability;density limit;-1/1 non-Resonant MP
Speaker
Jianjun Yuan
Huazhong University of Science and Technology

Zhonghe Jiang
Professor School of Electrical and Electronic Engineering, Huazhong University of Science and Technology

Comment submit
Verification code Change another
All comments
Contact:
Prof. Lu Wang

Email: luwang@hust.edu.cn

Prof. Zhongyong Chen

Email: zychen@hust.edu.cn

Jingwei Fu

Email: fujingwei@hust.edu.cn

Meiling Liang

Email: mlliang@hust.edu.cn

Wei Zheng

Email: zhengwei@hust.edu.cn