Abstract
Abstract
A new type of resonant magnetic perturbation (RMP), generated by helical coils, is proposed for controlling the edge localized mode (ELM) in H-mode tokamak plasmas. The helical coil optimization utilizes the MARS-F code (Liu et al 2000 Phys. Plasmas
7 3681) computed linear resistive fluid response of the plasma to the applied RMP field. The optimal helical coils are found to be located near the outboard mid-plane of the torus, with relatively simple shape but tilted towards the equilibrium magnetic field line pitch. Compared to the window-frame ELM control coils, the optimal helical coils require 2–4 times less current, in order to achieve the same ELM control performance specified by various figures of merit adopted in this work. The results from the present study show a promising path forward in achieving ELM control with RMP fields in tokamak plasmas.
Funder
the U.S. DoE Office of Science
the project of Chongqing Technology and Business University
the Science and Technology Research Program of Chongqing Municipal Education Commission
National Natural Science Foundation of China
Chongqing Basic Research and Frontier Exploration Project in 2019
National Magnetic Confinement Fusion Science Program of China