Author(s)

Zhongtian Wang^1*, Xiaochang Chen^1*, Yifan Yan², Huidong Li³, Qian Liu⁴, Maolin Mou⁵, Na Wu⁵, Zhanhui Wang², Rui Ke², Lin Nie², Ming Xu²

¹School of Sciences, Nanchang University, Nanchang, China.
²Southwestern Institute of Physics, Chengdu, China.
³School of Science, Xihua University, Chengdu, China.
⁴Department of Engineering Physics, Tsinghua University, Beijing, China.
⁵College of Physical Science and Technology, Sichuan University, Chengdu, China.

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.

Electrostatic Trapping, Bootstrap Current, Mitigation, Peeling-Ballooning Mode

Wang, Z. , Chen, X. , Yan, Y. , Li, H. , Liu, Q. , Mou, M. , Wu, N. , Wang, Z. , Ke, R. , Nie, L. and Xu, M. (2019) Mitigation of ELMs by Electrostatic Field in Tokamaks. Journal of High Energy Physics, Gravitation and Cosmology, 5, 149-155. doi: 10.4236/jhepgc.2019.51007.