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Impact of additional plasma heating on detached plasma formation in divertor simulation experiments using the GAMMA 10/PDX tandem mirror
https://repo.qst.go.jp/records/72856
https://repo.qst.go.jp/records/728563d0228f6-be6d-45b1-9465-83a3f787be45
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-07-05 | |||||
| タイトル | ||||||
| タイトル | Impact of additional plasma heating on detached plasma formation in divertor simulation experiments using the GAMMA 10/PDX tandem mirror | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Nakashima, Y.
× Nakashima, Y.× Islam, M.S.× Iijima, T.× Yokodo, T.× Sakamoto, M.× Ezumi, N.× Yoshikawa, M.× Asakura, Nobuyuki× Fukumoto, Masakatsu× Hatayama, A.× Hirata, M.× Ichimura, K.× Ichimur, M.× Ikezoe, R.× Imai, T.× Islam, M.M.× Kariya, T.× Katanuma, I.× Kohagura, J.× Lee, G.× Masuzaki, S.× Minami, R.× Nakano, Tomohide× Nojiri, K.× Numakura, T.× Sawada, K.× Terakado, A.× Togo, S.× Yamashita, S.× Yoshimoto, T.× Asakura, Nobuyuki× Fukumoto, Masakatsu× Nakano, Tomohide |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In this paper, the detailed results of the effect of additional plasma heating under the condition of plasma detachment produced in the large tandem mirror GAMMA 10/PDX. In this experiment, the ECH pulse of 150 kW was applied to the upstream region of detached plasmas established by injecting heavy noble gases (Ar, Kr and Xe) and the significant phenomena on detached to attached transition were measured with Langmuir probes, calorimeters, spectrometers and a high-speed camera. In the presentation, detailed behavior of the plasma parameters is described and the effect of ECH is discussed in terms of radiation loss power and ionization and recombination processes. During the plasma detachment experiments by impurity gas seeding, a short pulse (25 ms) of ECH was applied at the east plug/barriercell to examine the effects of ECH on the detached plasma. A brief summary of the outcomes is given below: ECH heating pulse significantly increases the heat flux at the west end-cell, which indicates detached to attached transition phenomena. During ECH injection period, the ion flux also increases with the increasing gas injection. The emission from the impurity ion enhances significantly during ECH injection period. The emission intensity captured with fast camera also shows a clear dependence on the gas throughput of N2 gas. Comparison of the results using light impurities (N2 and Ne) to those by a heavy impurity gas (Ar) indicates that detached plasma with N2 seeding has a certain tolerance for the additional heating. These outcomes also indicate to consider the sustainability of the detached plasma during ELM. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 23rd International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI-23) | |||||
| 発表年月日 | ||||||
| 日付 | 2018-06-18 | |||||
| 日付タイプ | Issued | |||||
