Isotope effect in transient electron thermal transport property and its impact on the electron internal transport barrier formation in LHD

• Kobayashi, Tatsuya

• IDA, Katsumi

• TANAKA, Kenji

• YOSHINUMA, Mikiro

• TSUJIMIRA, Toru

• INAGAKI, Shigeru

• TOKUZAWA, Tokihiko

• TSUCHIYA, Hayato

• TAMURA, Naoki

• IGAMI, Hiroe

• YOSHIMURA, Yasuo

• ITOH, Sanae -I.

• ITOH, Kimitaka

• LHD, Experiment Group

抄録

0000-0001-5669-1937

0000-0002-1606-3204

0000-0002-0585-4561

0000-0003-1682-1519

In this study, we perform a comprehensive comparison of the transport hysteresis width in deuterium (D) plasmas, hydrogen (H) plasmas, and D-H mixed plasmas. The core focused modulation electron cyclotron resonance heating (MECH) is applied as the heat source perturbation, and the heat flux is evaluated using the energy conservation equation with the measured electron temperature response and the ECH deposition profile calculated by the ray-tracing scheme. Systematic density scan in plasmas with different ion mass reveals that there is no significant isotope effect in their hysteresis width. It is found that plasmas with heavier isotope mass can easily form the electron internal transport barrier. As the hysteresis width is insensitive to the isotope mass, the classical part of the diffusivity is considered to be responsible for the isotope effect in the transport barrier formation.

収録刊行物

• Nuclear Fusion

  Nuclear Fusion 60 (7), 076015-, 2020-06-15

  IOP Publishing

キーワード

• isotope effect
• transient transport
• transport hysteresis
• heat pules propagation
• stellarator/heliotron
• internal transport barrier

詳細情報

• CRID: 1050570232438017536
• NII論文ID: 120007116690
• NII書誌ID: AA12472385
• ISSN: 17414326
• HANDLE: 10655/00012587
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/10605
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles