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Divertor Detachment with Multi-Species Impurity Seeding in LHD
- Source :
- Plasma and Fusion Research. 15:1402051
- Publication Year :
- 2020
- Publisher :
- The Japan Society of Plasma Science and Nuclear Fusion Research, 2020.
-
Abstract
- Divertor detachment using higher-Z (Kr) and/or lower-Z (Ne) is investigated. Using Kr+Ne superimposed seeding, plasma radiation could be enhanced at the upstream region in the edge plasma with suppression of impurity accumulation toward the core plasma. Here, the pre-seeded Kr emission was drastically enhanced after the subsequent Ne seeding. Moreover, the detachment using Kr+Ne seeding could be stably sustained while the detachment using single species seeding is short-lived. Reduction of edge electron temperature due to Ne seeding can promote the Kr emission at the upstream region. It indicates the availability of multi-species impurity seeding with different cooling rate.
Details
- Language :
- English
- ISSN :
- 18806821
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Plasma and Fusion Research
- Accession number :
- edsair.doi.dedup.....217a40a4ccc81c2939f9a96ab1aa73be
- Full Text :
- https://doi.org/10.1585/pfr.15.1402051