Turbulence spreading induced <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>E</mml:mi> <mml:mstyle/> <mml:mo>×</mml:mo> <mml:mstyle/> <mml:mi>B</mml:mi> </mml:mrow> </mml:math> vortex flow generation in a magnetic island
Abstract We derive a self-consistent relation between turbulence spreading flux and vortex flow acceleration for time-stationary turbulence inside a magnetic island (MI) by extending the Charney-Drazin momentum theorem. The result, which consists of flux-surface-averaged expressions with geometrical weight, indicates a dominant balance between the turbulence spreading flux through regions around X-points and the vortex flow away from the X-points on the same flux surface. This is in qualitative agreement with experimental observations from DIII-D, KSTAR and HL-2A.
Authors
- G. J. Choi (ORCID: https://orcid.org/0000-0003-0044-1650)
- Y.W. Cho (ORCID: https://orcid.org/0000-0001-6408-9604)
- A. Ishizawa (ORCID: https://orcid.org/0000-0002-5323-8448)
- Jae-Min Kwon (ORCID: https://orcid.org/0000-0002-2300-152X)
- M. Choi (ORCID: https://orcid.org/0000-0002-2825-6484)
- T. S. Hahm (ORCID: https://orcid.org/0000-0001-7015-0547)
- Eisung Yoon (ORCID: https://orcid.org/0000-0001-7107-7302)
Institutions
- Seoul National University of Science and Technology (KR)
- Nanyang Technological University (SG)
- Kyoto University (JP)
- Korea Institute of Fusion Energy (KR)
- Ulsan National Institute of Science and Technology (KR)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2024-10-03
- DOI
- https://doi.org/10.1088/1741-4326/ad82fa
- Citations
- 4
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 2.64
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- National Research Foundation of Korea
- Ministry of Science and ICT, South Korea
- Korea Hydro and Nuclear Power
- Korea Institute of Energy Technology Evaluation and Planning