Speaker
Jiaming Jiang
(Fusion Center for Scientist)
Description
HL-2M RMP (Resonance Magnetic Perturbation) Coils is designed to provide a resonant perturbation magnetic field for high beta plasma operation scenarios stability control, such as Edge Localized Modes (ELMs) suppression control, Resistance Wall Model (RWM) fast control and Error magnetic field correction control, etc.
Especially, ELMs result in impulsive burst of energy deposition on to the “Plasma Facing Components” (PFCs), causing a reduction in their lifetime. Various experiments have shown the application of “Resonant Magnetic perturbation” (RMPs) produced by in-vessel non-axisymmetric coils can be used to suppress ELMs.
HL-2M RMP coils consist of eight toroidal sectors of two(Upper and Lower) 4-turn round coils, total of 16 coils are supported above inner wall of vacuum vessel and positioned behind the First wall, without any welding contacts between them. its location has at least 70mm distance to the plasma edge. 25mm outer diameter of mineral insulated cable has been formed as coil conductor and each conductor is about 16m length. the RMP coils are rated 190V and 2.75kA per turn, DC to 100Hz.
The electromagnetic analysis results indicate RMP coil could resist plasma disruption on plasma edge, via an its invisible magnetic field; the maximum poloidal magnetic indensity is about 0.019T on plasma edge, the different RMP coil current produce the different poloidal magnetic indesity on plasma edge. The different electrical current or phase on difference sector RMP coils could produce toroidal magnetic vector, it perhaps could contribute to the plasma rotation scenarios.
Plasma initial current 3MA decline to 0 by lineal analysis for disruption Senario,while plasma moving from its initial position (R=1.78m) to the edge(R=2.4m), maximum eddy current on RMP coils is estimated and electromagnetic force is about 15kN/m. the maximum stress on RMP coils is about 35MPa, smaller than allowable value.
KEY WORDS:HL-2M RMP Coils, Electromagnetic Analysis, Disruption Senario
Co-authors
Jiaming Jiang
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
Qian Chen
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
Tengfei Sun
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
Xiaoquan Ji
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
Yi Liu
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
Yuncong Huang
(Fusion Center for Scientist, Southwestern Institute of Physics, Chengdu, China)
