抄録
We have investigated the synergistic effect of a combination of various impurity gases and hydrogen gas on plasma detachment of high temperature plasma, equivalent to scrape-off layer plasma of tokamaks in the GAMMA 10/PDX end region, utilizing an open magnetic field configuration. A small puff of an impurity gas (N2, Ne, Ar, Kr, Xe) in combination with a puff of H2 gas is examined to evaluate their synergistic effect on the formation of detached plasma; the following results are obtained. (i) A combination of N2 and H2 puffs showed a clear decrease of electron density and ion flux; (ii) N2 and H2 puffs form a strong density gradient along the axial direction; and (iii) other noble impurity gases showed an insufficient synergistic effect. The new results indicate the possibility of achieving a reliable divertor operation scheme and the importance of a deeper understanding of the H2 and N2 assisted recombination process.
本文言語 | 英語 |
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論文番号 | 066030 |
ジャーナル | Nuclear Fusion |
巻 | 59 |
号 | 6 |
DOI | |
出版ステータス | 出版済み - 5月 9 2019 |
!!!All Science Journal Classification (ASJC) codes
- 核物理学および高エネルギー物理学
- 凝縮系物理学