Multi-scale interaction between tearing modes and micro-turbulence in the HL-2A plasmas

Min JIANG (蒋敏); Yuhong XU (许宇鸿); Zhongbing SHI (石中兵); Wulyu ZHONG (钟武律); Wei CHEN (陈伟); Rui KE (柯锐); Jiquan LI (李继全); Xuantong DING (丁玄同); Jun CHENG (程钧); Xiaoquan JI (季小全); Zengchen YANG (杨曾辰); Peiwan SHI (施培万); Jie WEN (闻杰); Kairui FANG (方凯锐); Na WU (吴娜); Xiaoxue HE (何小雪); Anshu LIANG (梁桉树); Yi LIU (刘仪); Qingwei YANG (杨青巍); Min XU (许敏); HL-A Team

doi:10.1088/2058-6272/ab8785

Plasma Science and Technology > 2020 > 22(8): 80501-080501. > DOI: 10.1088/2058-6272/ab8785

Min JIANG (蒋敏), Yuhong XU (许宇鸿), Zhongbing SHI (石中兵), Wulyu ZHONG (钟武律), Wei CHEN (陈伟), Rui KE (柯锐), Jiquan LI (李继全), Xuantong DING (丁玄同), Jun CHENG (程钧), Xiaoquan JI (季小全), Zengchen YANG (杨曾辰), Peiwan SHI (施培万), Jie WEN (闻杰), Kairui FANG (方凯锐), Na WU (吴娜), Xiaoxue HE (何小雪), Anshu LIANG (梁桉树), Yi LIU (刘仪), Qingwei YANG (杨青巍), Min XU (许敏), HL-A Team. Multi-scale interaction between tearing modes and micro-turbulence in the HL-2A plasmas[J]. Plasma Science and Technology, 2020, 22(8): 80501-080501. DOI: 10.1088/2058-6272/ab8785

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Multi-scale interaction between tearing modes and micro-turbulence in the HL-2A plasmas

¹ Southwestern Institute of Physics, Chengdu 610041, People's Republic of China
² Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
³ School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China

Funds: This work is partly supported by the National Key R&D Program of China (Nos. 2017YFE0301201 and 2017YFE0301106), partly by National Natural Science Foundation of China (Nos. 11705051, 11820101004, 11875021 and 11775069), and partly by the Young Elite Scientists Sponsorship Program by CAST (No. 2018QNRC001).

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Received Date: January 16, 2020
Revised Date: March 24, 2020
Accepted Date: April 06, 2020

Graphical Abstract

Abstract

Abstract

The influence of m/n = 2/1 (m and n are poloidal and toroidal mode numbers) tearing modes on plasma perpendicular flows and micro-fluctuations has been investigated in HL-2A neutral beam injection heated L-mode plasmas. It is found that the local perpendicular rotation velocity and turbulence energy are modulated by the alternation between the island X-point and O-point of the naturally rotating tearing modes. Cross-correlation analysis indicates that the modulation of density fluctuations by the tearing mode is not only limited to the island region, but also occurs in the edge region near the last closed flux surface. The turbulence exhibits distinct spectral characteristics inside and outside the island region. In addition, it is observed that the particle flux near the strike point is also significantly impacted by the tearing modes. The experimental evidence reveals that there are strong core-edge interactions between the core tearing modes and the edge transport.
- tearing modes,
- turbulence,
- particle flux,
- modulation,
- core-edge interaction

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References (29)

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