The role of shear flow collapse and enhanced turbulence spreading in edge cooling approaching the density limit

Experimental studies of the dynamics of shear flow and turbulence spreading at the edge of tokamak plasmas are reported. Scans of line-averaged density and plasma current are carried out while approaching the Greenwald density limit on the J-TEXT tokamak. In all scans, when the Greenwald fraction ${...

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Bibliographic Details

Published in:	Nuclear Fusion
Main Authors:	Ting Long, P.H. Diamond, Rui Ke, Zhipeng Chen, Xin Xu, Wenjing Tian, Rongjie Hong, Mingyun Cao, Yanmin Liu, Min Xu, Lu Wang, Zhoujun Yang, Jinbang Yuan, Yongkang Zhou, Qinghao Yan, Qinghu Yang, Chengshuo Shen, Lin Nie, Zhanhui Wang, Guangzhou Hao, Nengchao Wang, Zhongyong Chen, Jiquan Li, Wei Chen, Wulyu Zhong
Format:	Article
Language:	English
Published:	IOP Publishing 2024-01-01
Subjects:	tokamak density limit edge cooling turbulence spreading shear flow
Online Access:	https://doi.org/10.1088/1741-4326/ad3e15