Effect of edge turbulent transport on scrape-off layer width on HL-2A tokamak

Ting WU (吴婷); Min XU (许敏); Lin NIE (聂林); Yi YU (余羿); Jianqiang XU (许健强); Ting LONG (龙婷); Yu HE (何钰); Jun CHENG (程钧); Longwen YAN (严龙文); Zhihui HUANG (黄治辉); Rui KE (柯锐); Peng SHI (石鹏); Shuo WANG (王硕); Bing LIU (刘兵)

doi:10.1088/2058-6272/abd6b7

Plasma Science and Technology > 2021 > 23(2): 25101-025101. > DOI: 10.1088/2058-6272/abd6b7

Ting WU (吴婷), Min XU (许敏), Lin NIE (聂林), Yi YU (余羿), Jianqiang XU (许健强), Ting LONG (龙婷), Yu HE (何钰), Jun CHENG (程钧), Longwen YAN (严龙文), Zhihui HUANG (黄治辉), Rui KE (柯锐), Peng SHI (石鹏), Shuo WANG (王硕), Bing LIU (刘兵). Effect of edge turbulent transport on scrape-off layer width on HL-2A tokamak[J]. Plasma Science and Technology, 2021, 23(2): 25101-025101. DOI: 10.1088/2058-6272/abd6b7

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Effect of edge turbulent transport on scrape-off layer width on HL-2A tokamak

¹ Southwestern Institute of Physics, Chengdu 610041, People's Republic of China
² School of Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
³ Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, People's Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Nos. 11875124, U1867222, 11575055, 11705052, 11875020 and 11705151) and National Key Research and Development Program of China (Nos. 2018YFE0309103, 2018YFE0303102, 2017YFE0300405 and 2017YFE0301203).

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Received Date: September 10, 2020
Revised Date: December 21, 2020
Accepted Date: December 23, 2020

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Abstract

Abstract

Effect of edge turbulent transport on scrape-off layer (SOL) width has been investigated in Ohmically heated L-mode plasma under limiter configurations on HL-2A tokamak. It has been found that SOL width is doubled when plasma current decreases about 20%. With larger plasma current, E × B shear is stronger and has greater suppression effect on edge turbulent transport. SOL width is larger when power of relative density fluctuation level in the edge region is larger. It is concluded that edge turbulent transport plays a significant role on SOL width. These experimental findings may provide a better understanding and controlling of power exhaust for present and future fusion devices.
- SOL width,
- edge turbulent transport,
- E × B shear,
- turbulence spreading

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Effect of edge turbulent transport on scrape-off layer width on HL-2A tokamak

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