Design of rotating resonant magnetic perturbation coil system in the STOR-M tokamak

Design of rotating resonant magnetic perturbation coil system in the STOR-M tokamak

•Static RMP fields were successfully produced in STOR-M by an (l=2, n=1) helical coil.•A new RMP system, consisting of sets of saddle coils powered by an AC power supply, is being designed to generate rotating RMP fields.•The total magnetic field produced by the coil system was calculated at the q=2...

Full description

Saved in:
Bibliographic Details
Published in:Fusion engineering and design Vol. 123; pp. 148 - 152
Main Authors: Elgriw, Sayf, Adegun, Joseph, Patterson, Michael, Rohollahi, Akbar, Basu, Debjyoti, Nakajima, Masaru, Colville, Kale, Gomez, Daniel, Greenwald, Chelsea, Zhang, Jiping, Hirose, Akira, Xiao, Chijin
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-11-2017
Elsevier Science Ltd
Subjects:
Coiling
Coils
Computer simulation
Electric power supplies
Magnetic fields
Magnetic islands
Magnetism
Nuclear reactors
Parameters
Resonant interactions
Resonant magnetic perturbation
Rotating plasmas
Rotation
Saddle coil
Simulation
STOR-M
Tokamak
Tokamak devices
Tokamak
STOR-M
Resonant magnetic perturbation
Saddle coil
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Static RMP fields were successfully produced in STOR-M by an (l=2, n=1) helical coil.•A new RMP system, consisting of sets of saddle coils powered by an AC power supply, is being designed to generate rotating RMP fields.•The total magnetic field produced by the coil system was calculated at the q=2 surface.•The saddle coils generate a dominant (2, 1) mode with sideband (2, 3) and (2, 5) modes.•An H-bridge circuit will be utilized to drive an AC current through the saddle coils. The interaction between resonant magnetic perturbations (RMP) and plasma is an active topic in fusion energy research. RMP involves the use of radial magnetic fields generated by external coils installed on a tokamak device. The resonant interaction between the plasma and the RMP field has many favorable effects such as suppression of instabilities and, under certain conditions, improvement of discharge parameters in tokamaks. The RMP technique has been successfully implemented in the STOR-M tokamak. A set of (m=2, n=1) helical coils carrying a current pulse was used to study the effects of RMP on magnetic islands, plasma rotation, and other edge plasma parameters. A new RMP system is being developed for the STOR-M tokamak. The system consists of a number of external saddle coils distributed in the poloidal and toroidal directions and powered by AC power supplies to generate a rotating RMP field. Numerical simulations have been carried out to calculate several parameters for the new RMP system such as the magnetic field and the dominant modes generated by the coils. The dominant mode generated by the new RMP coil system may be tuned to (2, 1) with significant contributions from (2, 3) and (2, 5) modes.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2017.03.161