Recent results from deuterium experiments on the large helical device and their contribution to fusion reactor development

Nuclear Fushion

article

Masaki Osakabe¹  Hiromi Takahashi¹  Hiroshi Yamada³  Kenji Tanaka¹  Tatsuya Kobayashi¹  Katsumi Ida¹  Satoshi Ohdachi¹  Jacobo Varela⁵  Kunihiro Ogawa¹  Masahiro Kobayashi¹  Katsuyoshi Tsumori¹  Katsunori Ikeda¹  Suguru Masuzaki¹  Masahiro Tanaka¹  Motoki Nakata¹  Sadayoshi Murakami⁶  Shigeru Inagaki⁴  Kiyofumi Mukai¹  Mizuki Sakamoto⁷  Kazunobu Nagasaki⁶  Yasuhiro Suzuki¹  Mitsutaka Isobe¹  Tomohiro Morisaki¹ 

[1] National Institute for Fusion Science, National Institutes of Natural Sciences;The Graduate University for Advanced Studies;The University of Tokyo;Kyushu University;Universidad Carlos III de Madrid;Kyoto University;University of Tsukuba

关键词: LHD;    stellarator;    isotope effect;    deuterium experiment;    energetic particleconfinement;    RMP induced H-mode;    tritium mass balance;   

DOI  :  10.1088/1741-4326/ac3cda

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

In recent deuterium experiments on the large helical device (LHD), we succeeded in expanding the temperature domain to higher regions for both electron and ion temperatures. Suppression of the energetic particle driven resistive interchange mode (EIC) by a moderate electron temperature increase is a key technique to extend the high temperature domain of LHD plasmas. We found a clear isotope effect in the formation of the internal transport barrier in high temperature plasmas. A new technique to measure the hydrogen isotope fraction was developed in the LHD in order to investigate the behavior of the isotope mixing state. The technique revealed that the non-mixing and the mixing states of hydrogen isotopes can be realized in plasmas. In deuterium plasmas, we also succeeded in simultaneously realizing the formation of the edge transport barrier (ETB) and the divertor detachment. It is found that resonant magnetic perturbation plays an important role in the simultaneous formation of the ETB and the detachment. Contributions to fusion reactor development from the engineering point of view, i.e. negative-ion based neutral beam injector research and the mass balance study of tritium, are also discussed.

【 授权许可】

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