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Turbulence Transition in Magnetically Confined Hydrogen and Deuterium Plasmas.
Kinoshita, T; Tanaka, K; Ishizawa, A; Sakai, H; Nunami, M; Ohtani, Y; Yamada, H; Sato, M; Nakata, M; Tokuzawa, T; Yasuhara, R; Takemura, Y; Yamada, I; Funaba, H; Ida, K; Yoshinuma, M; Tsujimura, T; Seki, R; Ichiguchi, K; Michael, C A.
Afiliação
  • Kinoshita T; Research Institute for Applied Mechanics, <a href="https://ror.org/00p4k0j84">Kyushu University</a>, Kasuga, Fukuoka 816-8580, Japan.
  • Tanaka K; Interdisciplinary Graduate School of Engineering Sciences, <a href="https://ror.org/00p4k0j84">Kyushu University</a>, Kasuga, Fukuoka 816-8580, Japan.
  • Ishizawa A; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Sakai H; Graduate School of Energy Science, <a href="https://ror.org/02kpeqv85">Kyoto University</a>, Uji, Kyoto, 611-0011, Japan.
  • Nunami M; Interdisciplinary Graduate School of Engineering Sciences, <a href="https://ror.org/00p4k0j84">Kyushu University</a>, Kasuga, Fukuoka 816-8580, Japan.
  • Ohtani Y; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Yamada H; Graduate School of Science, <a href="https://ror.org/04chrp450">Nagoya University</a>, Nagoya, Aichi, 464-8601, Japan.
  • Sato M; <a href="https://ror.org/020rbyg91">National Institutes for Quantum and Radiological Science and Technology</a>, Naka, Ibaraki, 311-0193, Japan.
  • Nakata M; Graduate School of Frontier Sciences, <a href="https://ror.org/057zh3y96">The University of Tokyo</a>, Kashiwa, Chiba 277-8568, Japan.
  • Tokuzawa T; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Yasuhara R; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Takemura Y; <a href="https://ror.org/0516ah480">The Graduate University for Advanced Studies</a>, SOKENDAI, Toki, Gifu, 509-5292, Japan.
  • Yamada I; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Funaba H; <a href="https://ror.org/0516ah480">The Graduate University for Advanced Studies</a>, SOKENDAI, Toki, Gifu, 509-5292, Japan.
  • Ida K; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Yoshinuma M; <a href="https://ror.org/0516ah480">The Graduate University for Advanced Studies</a>, SOKENDAI, Toki, Gifu, 509-5292, Japan.
  • Tsujimura T; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Seki R; <a href="https://ror.org/0516ah480">The Graduate University for Advanced Studies</a>, SOKENDAI, Toki, Gifu, 509-5292, Japan.
  • Ichiguchi K; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
  • Michael CA; <a href="https://ror.org/01t3wyv61">National Institute for Fusion Science</a>, National Institutes on Natural Sciences, Toki, Gifu, 509-5292, Japan.
Phys Rev Lett ; 132(23): 235101, 2024 Jun 07.
Article em En | MEDLINE | ID: mdl-38905665
ABSTRACT
In this study, we discovered a turbulence transition in a large helical device. The turbulence level and turbulence-driven energy transport decrease to a specific transition density and increase above it. The ruling turbulences below and above the transition density were ion-temperature gradient (ITG) and resistive-interchange (RI) turbulences, consistent with the predictions of gyrokinetic theory and two-fluid MHD model, respectively. Isotope experiments on hydrogen (H) and deuterium (D) clarified the role of transitions. In the ITG regime, turbulence levels and energy transport were comparable in the H and D plasmas. In contrast, in the RI regime, they were clearly suppressed in the D plasma. The results provide crucial knowledge for understanding isotope effects and future optimization of stellarator and heliotron devices.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2024 Tipo de documento: Article