Compatibility of pronounced detachment with improved confinement on HL-2A tokamak
Abstract This paper investigates the compatibility of pronounced detachment with improved confinement based on the NBI-heated HL-2A L-mode plasma with low-density. Through impurity seeding, radiation becomes higher at plasma edge and causes edge cooling after pronounced detachment. Turbulent transport is examined in detail by experiments and global integrated simulations. Ion dominant turbulent transport decreases at normalized minor radius <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi>ρ</mml:mi> <mml:mo>∈</mml:mo> <mml:mrow> <mml:mo>[</mml:mo> <mml:mrow> <mml:mn>0.1</mml:mn> <mml:mo>,</mml:mo> <mml:mn>0.4</mml:mn> </mml:mrow> <mml:mo>]</mml:mo> </mml:mrow> <mml:mo>,</mml:mo> </mml:mrow> </mml:math> and ion temperature increases at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi>ρ</mml:mi> <mml:mo>∈</mml:mo> <mml:mrow> <mml:mo>[</mml:mo> <mml:mrow> <mml:mn>0</mml:mn> <mml:mo>,</mml:mo> <mml:mn>0.8</mml:mn> </mml:mrow> <mml:mo>]</mml:mo> </mml:mrow> </mml:mrow> </mml:math> . Edge turbulence and turbulent transport through ion channels decrease significantly, which could result from reduced free energy source due to edge cooling. The reduced edge turbulent transport benefits to decrease the power entering the SOL/divertor. The decreased edge outward transport and increased core electron density and ion temperature make major contributions to the improved plasma confinement after pronounced detachment.
Authors
- Xin‐Yao Yu (ORCID: https://orcid.org/0000-0003-3576-5815)
- Zhihui Huang (ORCID: https://orcid.org/0009-0000-7000-8882)
- Zhanhui Wang (ORCID: https://orcid.org/0000-0002-0167-9559)
- Jinming Gao (ORCID: https://orcid.org/0000-0002-9546-5139)
- Zhe Wang (ORCID: https://orcid.org/0000-0003-3778-7452)
- X.X. He (ORCID: https://orcid.org/0000-0002-1088-4845)
- Y. Zhang (ORCID: https://orcid.org/0000-0003-1411-1257)
- Yiren Zhu (ORCID: https://orcid.org/0000-0002-8080-8338)
- Laizhong Cai (ORCID: https://orcid.org/0000-0002-7990-3282)
- Kaiyang Yi
- Rui Ke (ORCID: https://orcid.org/0000-0003-0117-0098)
- Ruotong Wang (ORCID: https://orcid.org/0009-0007-4576-5188)
- Na Wu (ORCID: https://orcid.org/0000-0001-7949-5330)
- Yonggao Li
- Weice Wang (ORCID: https://orcid.org/0009-0003-5584-1210)
- Yihang Chen (ORCID: https://orcid.org/0000-0001-9274-9120)
- Ting Long (ORCID: https://orcid.org/0000-0002-0136-8953)
- W. H. Tian
- Kai Zhang (ORCID: https://orcid.org/0000-0003-4760-6985)
- L. Liu (ORCID: https://orcid.org/0000-0002-6753-925X)
- Dong Li (ORCID: https://orcid.org/0000-0003-3746-0839)
- Min Xu
- Yi Yu (ORCID: https://orcid.org/0000-0002-3395-7744)
- L. Nie (ORCID: https://orcid.org/0000-0001-6281-4518)
- Longwen Yan
- Z. C. Yang
- Ting Wu
- Zhuo Wang (ORCID: https://orcid.org/0009-0002-2315-8604)
Institutions
- Sun Yat-sen University (CN)
- Southwestern Institute of Physics (CN)
- Renmin University of China (CN)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2024-12-12
- DOI
- https://doi.org/10.1088/1741-4326/ad9e04
- Citations
- 1
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 0.66
Funders
- National Natural Science Foundation of China
- Jiangsu Development and Reform Commission
- National Key Research and Development Program of China