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Recent progress of magnetic reconnection research in the MAST spherical tokamak
- Source :
- Physics of Plasmas. 24:056108
- Publication Year :
- 2017
- Publisher :
- AIP Publishing, 2017.
-
Abstract
- In the last three years, magnetic reconnection research in the MAST spherical tokamak achieved major progress by the use of new 32 chord ion Doppler tomography and 130 channel YAG and 300 channel Ruby Thomson scattering diagnostics. In addition to the previously achieved high power plasma heating during merging, detailed full temperature profile measurements including the diffusion region have been achieved for the first time. 2D imaging measurements of ion and electron temperature profiles have revealed that magnetic reconnection mostly heats ions globally in the downstream region of outflow jet and electrons locally around the X-point. The toroidal field in MAST “over 0.3T” strongly inhibits cross-field thermal transport, and the characteristic peaked electron temperature profile around the X-point is sustained on a millisecond time scale. In contrast, ions are mostly heated in the downstream region of outflow acceleration and around the stagnation point formed by reconnected flux mostly by viscosity di...
- Subjects :
- Physics
Tokamak
Thomson scattering
Magnetic reconnection
Plasma
Electron
Spherical tokamak
Condensed Matter Physics
01 natural sciences
010305 fluids & plasmas
law.invention
Physics::Plasma Physics
law
0103 physical sciences
Electron temperature
Plasma diagnostics
Atomic physics
010306 general physics
Subjects
Details
- ISSN :
- 10897674 and 1070664X
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Physics of Plasmas
- Accession number :
- edsair.doi...........8c17bd6b45a8c0e63d1351a9ebfb8999