TY  - JOUR
AU  - Gao, Xiang
AU  - Yang, Yao
AU  - Zhang, Tao
AU  - Liu, Haiqing
AU  - Li, Guoqiang
AU  - Ming, Tingfeng
AU  - Liu, Zixi
AU  - Wang, Yumin
AU  - Zeng, Long
AU  - Han, Xiang
AU  - Liu, Yukai
AU  - Wu, Muquan
AU  - Qu, Hao
AU  - Shen, Biao
AU  - Zang, Qing
AU  - Yu, Yaowei
AU  - Kong, Defeng
AU  - Gao, Wei
AU  - Zhang, Ling
AU  - Cai, Huishan
AU  - Wu, Xuemei
AU  - Hanada, K.
AU  - Zhong, Fubin
AU  - Liang, Yunfeng
AU  - Hu, Chundong
AU  - Liu, Fukun
AU  - Gong, Xianzhu
AU  - Xiao, Bingjia
AU  - Wan, Baonian
AU  - Zhang, Xiaodong
AU  - Li, Jiangang
TI  - Key issues for long-pulse high- β N operation with the Experimental Advanced Superconducting Tokamak (EAST)
JO  - Nuclear fusion
VL  - 57
IS  - 5
SN  - 1741-4326
CY  - Vienna
PB  - IAEA
M1  - FZJ-2017-05556
SP  - 056021 -
PY  - 2017
AB  - In the last few years, long-pulse H-mode plasma discharges (with small edge-localized modes and normalized beta, β N ~ 1) have been realized at the Experimental Advanced Superconducting Tokamak (EAST). This paper reports on high-β N (>1.5) discharges in the 2015 EAST campaign. The characteristics of these H-mode plasmas have been presented in a database. Analysis of the experimental limit of β N has revealed several main features of typical discharges. Firstly, efficient, stable high heating power is required. Secondly, control of impurity radiation (partly due to interaction between the plasma and the in-vessel components) is also a critical issue for the maintenance of high-β N discharges. In addition an internal transport barrier (ITB) has recently been observed in EAST, introducing further improvement in confinement surpassing H-mode plasmas. ITB dynamics is another key issue for high-β N plasmas in EAST. Each of these features is discussed in this paper. Study and improvement of these issues could be considered as the key to achieving long-pulse high-β N operation with EAST.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000399125300008
DO  - DOI:10.1088/1741-4326/aa626c
UR  - https://juser.fz-juelich.de/record/836435
ER  -