Mitigation of ELMs by Electrostatic Field in Tokamaks  

作　　者：Zhongtian Wang Xiaochang Chen Yifan Yan Huidong Li Qian Liu Maolin Mou Na Wu Zhanhui Wang Rui Ke Lin Nie Ming Xu 

机构地区：[1]School of Sciences, Nanchang University, Nanchang, China [2]Southwestern Institute of Physics, Chengdu, China [3]School of Science, Xihua University, Chengdu, China [4]Department of Engineering Physics, Tsinghua University, Beijing, China [5]College of Physical Science and Technology, Sichuan University, Chengdu, China

出　　处：《Journal of High Energy Physics, Gravitation and Cosmology》2019年第1期149-155,共7页高能物理（英文）

摘　　要：Mitigation of ELMs by electrostatic field is studied. The perpendicular heating in cyclotron waves tends to pile up the resonant particles toward the low magnetic field side in which a electrostatic field may result [J. Y. Hsu, V. S. Chan, R. W. Harvey, R. Prater, and S. K. Wong, Phys. Rev. Lett. 53, 564 (1984)]. The electrostatic field can make circulating particles trapped or make trapped particles circulating depending on the field direction. The trapped- particle population and bootstrap current change accordantly. Modulating bootstrap current, mitigation of type-1 ELM by the electrostatic field is possible. The electrostatic potential needed for the mitigation is quantitatively estimated. Experiments by either ECRH or biasing are being prepared to verify the theory.Mitigation of ELMs by electrostatic field is studied. The perpendicular heating in cyclotron waves tends to pile up the resonant particles toward the low magnetic field side in which a electrostatic field may result [J. Y. Hsu, V. S. Chan, R. W. Harvey, R. Prater, and S. K. Wong, Phys. Rev. Lett. 53, 564 (1984)]. The electrostatic field can make circulating particles trapped or make trapped particles circulating depending on the field direction. The trapped- particle population and bootstrap current change accordantly. Modulating bootstrap current, mitigation of type-1 ELM by the electrostatic field is possible. The electrostatic potential needed for the mitigation is quantitatively estimated. Experiments by either ECRH or biasing are being prepared to verify the theory.

关 键 词：Electrostatic TRAPPING BOOTSTRAP Current MITIGATION Peeling-Ballooning Mode 

分 类 号：R73[医药卫生—肿瘤]