Plasma parameters related to arc initiation on the tokamak first wall
- 1 June 1982
- journal article
- letter
- Published by IOP Publishing in Nuclear Fusion
- Vol. 22 (6), 823-826
- https://doi.org/10.1088/0029-5515/22/6/010
Abstract
The mechanism responsible for the initiation of unipolar arcs on the tokamak first wall is studied by measuring plasma parameters in the scrape-off layer. It is shown that a large electric field in the sheath region produced by runaway electrons is the dominant cause of the arc initiation. The difference in arc frequency in the toroidal direction on the limiter surface is explained by an asymmetry of the ion flux due to ion drift motion.Keywords
This publication has 16 references indexed in Scilit:
- Mechanism of unipolar arcs in tokamaksNuclear Fusion, 1980
- Analysis of the stainless steel limiter and of shields of the wasaprobe after operation in T-10Journal of Nuclear Materials, 1980
- Initial testing of TiB2 and TiC coated limiters in ISX-BJournal of Nuclear Materials, 1980
- Unipolar arcs in JFT-2 tokamakJournal of Nuclear Materials, 1980
- Arcing studies in the dite tokamak using a time-resolved arc detectorJournal of Nuclear Materials, 1980
- Observations of arcing in the ISX tokamakJournal of Nuclear Materials, 1979
- Time-resolved measurements of arcing in the DITE tokamakNuclear Fusion, 1979
- Probe measurements in the scrape-off layer of a TokamakPlasma Physics, 1978
- Ion sputtering, evaporation and arcing in DIVANuclear Fusion, 1978
- The role of arcing in producing metal impurities in tokamaksNuclear Fusion, 1978