Back to Search
Start Over
Stabilization of resistive wall mode and improved plasma performance in a low‐aspect‐ratio reversed field pinch by a single mode control power supply system.
- Source :
-
Electrical Engineering in Japan . Jun2022, Vol. 215 Issue 2, p1-8. 8p. - Publication Year :
- 2022
-
Abstract
- Stabilization of resistive wall modes (RWMs) is one of the important issues in magnetic fusion research. In the reversed field pinch (RFP), the number of unstable RWMs becomes smaller by lowering the aspect ratio (A), the ratio of the minor to major radius of the device. In REversed field pinch of Low‐Aspect ratio eXperiment (RELAX), whose aspect ratio is 2, unstable m/n = 1/2 RWM was stabilized by a single mode control power supply system with improvements of discharge performance. In this paper we report new results with modified power supply system in which magnetic boundary condition near the poloidal gaps is controlled. The modified power supply system is designed to stabilize the most unstable m/n = 1/2 mode by use of the saddle coil array covering the whole torus with eight (8) power supplies. The results show that the discharge duration is improved from ~ 3.0 ms to ~ 4.0 ms, limited by the capability of the iron core in RELAX device. Stabilization of the dominant RWM with the resultant improved plasma performance by a single mode control power supply system shows one of the advantages of a low‐aspect‐ratio RFP concepts. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POWER resources
*PLASMA instabilities
*CORE competencies
*TORUS
Subjects
Details
- Language :
- English
- ISSN :
- 04247760
- Volume :
- 215
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Electrical Engineering in Japan
- Publication Type :
- Academic Journal
- Accession number :
- 157265624
- Full Text :
- https://doi.org/10.1002/eej.23377