Isotope effects on energy, particle transport and turbulence in electron cyclotron resonant heating plasma of the Large Helical Device
| Autor: | Clive Michael, Gen Motojima, Hisamichi Funaba, Shin Kubo, Motoshi Goto, Toru Ii Tsujimura, Yasuo Yoshimura, Tomohiro Morisaki, Felix Warmer, Tsuyoshi Akiyama, Y. Takemura, Mamoru Shoji, Katsumi Ida, Y. Ohtani, Ichihiro Yamada, M. Yokoyama, Masaki Osakabe, Hiroe Igami, Toshiki Kinoshita, Motoki Nakata, Ryo Yasuhara, Takashi Shimozuma, Hiroto Takahashi, Mikiro Yoshinuma, Suguru Masuzaki, L. N. Vacheslavov, Ryosuke Seki, Tokihiko Tokuzawa, Kenji Tanaka |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Chemical substance Turbulence Cyclotron turbulence Plasma Electron Condensed Matter Physics law.invention Large Helical Device isotope effects Energy particle law Physics::Plasma Physics Kinetic isotope effect Physics::Space Physics transport Atomic physics LHD |
| Zdroj: | K. Tanaka et al 2019 Nucl. Fusion 59 126040 Nuclear Fusion |
| ISSN: | 1741-4326 |
| Popis: | Positive isotope effects have been found in electron cyclotron resonant heating plasma of the Large Helical Device (LHD). The global energy confinement time (τE) in deuterium (D) plasma is 16% better than in hydrogen (H) plasma for the same line-averaged density and absorption power. The power balance analyses showed a clear reduction in ion energy transport, while electron energy transport does not change dramatically. The global particle confinement time (τp) is degraded in D plasma; τp in D plasma is 20% worse than in H plasma for the same line-averaged density and absorption power. The difference in the density profile was not due to the neutral or impurity sources, but rather was due to the difference in the transport. Ion scale turbulence levels show isotope effects. The core turbulence (ρ = 0.5–0.8) level is higher in D plasma than in H plasma in the low collisionality regime and is lower in D plasma than in H plasma. The density gradient and collisionality play a role in the core turbulence level. |
| Databáze: | OpenAIRE |
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