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Generation and observation of fast deuterium ions and fusion-born alpha particles in JET D-3He plasmas with the 3-ion radio-frequency heating scenario
https://repo.qst.go.jp/records/81228
https://repo.qst.go.jp/records/812283dfb97ba-1e7b-4782-9d83-bdeb14c9c31b
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-12-07 | |||||
| タイトル | ||||||
| タイトル | Generation and observation of fast deuterium ions and fusion-born alpha particles in JET D-3He plasmas with the 3-ion radio-frequency heating scenario | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Nocente, Massimo
× Nocente, Massimo× O Kazakov, Yevgen× Garcia, Jeronimo× G Kiptily, Vasily× Ongena, Jozef× Dreval, Mykola× Fitzgerald, Michael× E Sharapov, Sergei× Stancar, Ziga× Weisen, Henri× Baranov, Yuriy× Bierwage, Andreas× Craciunescu, Teddy× Dal Molin, Andrea× de la Luna, Elena× Dumont, Remi× Dumortier, Pierre× Eriksson, Jacob× Giacomelli, Luca× Giroud, Carine× Goloborodko, Victor× Gorini, Giuseppe× Khilkevitch, Evgeniy× K Kirov, Krassimir× Iliasova, Margarita× Jacquet, Philippe× Lauber, Philipp× Lerche, E× Mantsinen, MJ× Mariani, Alberto× Mazzi, Samuele× Nabais, Fernando× Filomena Ferreira Nave, Maria× Oliver, J× Panontin, Enrico× Rigamonti, Davide× Sahlberg, Arne× Salewski, Mirko× Shevelev, A× Shinohara, Koji× Paula, Sirén× Sumida, Shuhei× Tardocchi, Marco× Van Eester, Dirk× Varje, Jari× Zohar, Andrej× Contributors, JET× Bierwage, Andreas× Koji, Shinohara× Shuhei, Sumida |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Dedicated experiments to generate energetic D ions and D−3He fusion-born alpha particles were performed at the Joint European Torus (JET) with the ITER-like wall (ILW). Using the 3-ion D-(DNBI)-3He radio frequency (RF) heating scenario, deuterium ions from neutral beam injection (NBI) were accelerated in the core of mixed D−3He plasmas to higher energies with ion cyclotron resonance frequency (ICRF) waves, in turn leading to a core-localized source of alpha particles. The fast-ion distribution of RF-accelerated D-NBI ions was controlled by varying the ICRF and NBI power (P_{ICRF}≈4-6 MW, P_{NBI}≈3-20 MW), resulting in rather high D-D neutron (≈1×10^16/s) and D−3He alpha rates (≈2×10^16/s) at moderate input heating power. Theory and TRANSP analysis shows that large populations of co-passing MeV-range D ions were generated using the D−(DNBI)−3He 3-ion ICRF scenario. This important result is corroborated by several experimental observations, in particular gamma-ray measurements. The developed experimental scenario at JET provides unique conditions for probing several aspects of future burning plasmas, such as the contribution from MeV range ions to global confinement, but without introducing tritium. Dominant fast-ion core electron heating with T_i≈T_e and a rich variety of fast-ion driven Alfven eigenmodes (AEs) were observed in these D−3He plasmas. The observed AE activities do not have a detrimental effect on the thermal confinement and, in some cases, may be driven by the fusion born alpha particles. A strong continuous increase in neutron rate was observed during long-period sawteeth (>1 s), accompanied by the observation of reversed shear AEs, which implies that a non-monotonic q profile was systematically developed in these plasmas, sustained by the large fast-ion populations generated by the 3-ion ICRF scenario. | |||||
| 書誌情報 |
Nuclear Fusion 巻 60, 号 12, p. 124006, 発行日 2020-10 |
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| 出版者 | ||||||
| 出版者 | IOP Publishing | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0029-5515 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1741-4326/abb95d | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://iopscience.iop.org/article/10.1088/1741-4326/abb95d | |||||
