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.
| 元の言語 | 英語 |
|---|---|
| 記事番号 | 066030 |
| ジャーナル | Nuclear Fusion |
| 巻 | 59 |
| 発行部数 | 6 |
| DOI | |
| 出版物ステータス | 出版済み - 5 9 2019 |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Condensed Matter Physics
これを引用
Synergistic effect of nitrogen and hydrogen seeding gases on plasma detachment in the GAMMA 10/PDX tandem mirror. / Ezumi, N.; Iijima, T.; Sakamoto, M.; Nakashima, Y.; Hirata, M.; Ichimura, M.; Ikezoe, R.; Imai, T.; Kariya, T.; Katanuma, I.; Kohagura, J.; Minami, R.; Numakura, T.; Yoshikawa, M.; Togo, S.; Islam, M. S.; Islam, M. M.; Nojiri, K.; Terakado, A.; Jang, S.; Kinoshita, Y.; Mikami, T.; Yamashita, S.; Yoshimoto, T.; Hara, T.; Hatayama, A.; Ichimura, K.; Kado, S.; Masuzaki, S.; Nakano, T.; Ohno, N.; Sawada, S.; Tanaka, H.; Tonegawa, A.; Perillo, R.
：: Nuclear Fusion, 巻 59, 番号 6, 066030, 09.05.2019.研究成果: ジャーナルへの寄稿 › 記事
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TY - JOUR
T1 - Synergistic effect of nitrogen and hydrogen seeding gases on plasma detachment in the GAMMA 10/PDX tandem mirror
AU - Ezumi, N.
AU - Iijima, T.
AU - Sakamoto, M.
AU - Nakashima, Y.
AU - Hirata, M.
AU - Ichimura, M.
AU - Ikezoe, R.
AU - Imai, T.
AU - Kariya, T.
AU - Katanuma, I.
AU - Kohagura, J.
AU - Minami, R.
AU - Numakura, T.
AU - Yoshikawa, M.
AU - Togo, S.
AU - Islam, M. S.
AU - Islam, M. M.
AU - Nojiri, K.
AU - Terakado, A.
AU - Jang, S.
AU - Kinoshita, Y.
AU - Mikami, T.
AU - Yamashita, S.
AU - Yoshimoto, T.
AU - Hara, T.
AU - Hatayama, A.
AU - Ichimura, K.
AU - Kado, S.
AU - Masuzaki, S.
AU - Nakano, T.
AU - Ohno, N.
AU - Sawada, S.
AU - Tanaka, H.
AU - Tonegawa, A.
AU - Perillo, R.
PY - 2019/5/9
Y1 - 2019/5/9
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85067543975&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067543975&partnerID=8YFLogxK
U2 - 10.1088/1741-4326/ab1a4a
DO - 10.1088/1741-4326/ab1a4a
M3 - Article
AN - SCOPUS:85067543975
VL - 59
JO - Nuclear Fusion
JF - Nuclear Fusion
SN - 0029-5515
IS - 6
M1 - 066030
ER -