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Ion heating/transport characteristics of the merging startup plasma scenario in the TS-6 spherical tokamak
- Source :
- Nuclear Fusion, Vol 64, Iss 10, p 106008 (2024)
- Publication Year :
- 2024
- Publisher :
- IOP Publishing, 2024.
-
Abstract
- Here we report the ion heating/transport characteristics of the merging startup scenario in the TS-6 spherical tokamak. In addition to the previously investigated impulsive heating process during magnetic reconnection, here we also focus on a longer time scale response of the ion temperature profile both during and after merging, including the semi-steady plasma confinement phase. During magnetic reconnection, (i) the ion temperature profile forms a poloidally asymmetric profile around the X-point in the initiation phase and (ii) radially asymmetric higher deposition is obtained at the high field side. After merging, (iii) the radially asymmetric double-peak structure is affected by parallel heat conduction and is aligned with field lines, but it does not simply become a flux function on a microsecond time scaleāinboard/outboard asymmetry lasts even in the semi-steady confinement phase. (iv) Under the influence of the low-aspect-ratio configuration, there is a two to three times higher toroidal field on the high-field side on the same closed flux surface: characteristic asymmetry of inboard/outboard ion temperature has been found experimentally for the first time.
Details
- Language :
- English
- ISSN :
- 17414326 and 00295515
- Volume :
- 64
- Issue :
- 10
- Database :
- Directory of Open Access Journals
- Journal :
- Nuclear Fusion
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8c22d83f3db4f49b41a32c478464bad
- Document Type :
- article
- Full Text :
- https://doi.org/10.1088/1741-4326/ad6338