The Tungsten Guard Limiter of 4.6 GHz Lower Hybrid Current Drive Under EAST Operations

doi:10.1109/TPS.2022.3157303

	The Tungsten Guard Limiter of 4.6 GHz Lower Hybrid Current Drive Under EAST Operations
	Liu, Changle 1; Zhang, Liangliang 2; Cao, Lei 2; Li, Lei 2; Liu, Liang 2; Wang, Mao 2; Yao, Damao 2
刊名	IEEE TRANSACTIONS ON PLASMA SCIENCE
	2022-04-01
卷号	50
关键词	Experimental Advanced Superconducting Tokamak (EAST) hot spots lower hybrid current drive (LHCD) tungsten guard limiter (GL)
ISSN号	0093-3813
DOI	10.1109/TPS.2022.3157303
通讯作者	Yao, Damao(yaodm@ipp.ac.cn)
英文摘要	The 4.6 GHz lower hybrid current drive (LHCD) waveguide is a dominative auxiliary heating and current drive facility in Experimental Advanced Superconducting Tokamak (EAST), but a large number of hot spots were observed on the previous guard limiter (GL) of graphite monoblocks plated with SiC during 2016-2017 campaigns, which limited to the plasma density, the superconductor currents, and the heating power of LHCD in EAST operations and also led to the plasma disruptions due to the carbon impurity. Therefore, we developed a tungsten GL for 4.6 GHz LHCD facility employed in the operations. The thermal transfer issues are resolved with a numerical simulation method. The fluid circuit is designed symmetrically considering the interchangeability. The joint water box is schemed based on the physical requirements with explosive welding technology. The new GL experienced the plasma discharges in the LHCD operations under the conditions of I-p similar to 400-600 kA, n(e) similar to 2-4 x 10(19) m(-3), and I-t similar to -10 000/-11 000 A in the plasma discharges. The maximum operated power of LHCD reached 3.7 MW and a short pulse discharge lasted 20 s at operated power of 2.9 MW. In consequence, the plasmas discharges were controlled well without any disruptions due to the hot spot reasons and ended smoothly. It indicates that the hot spots of LHCD GL ever considered as an inevitable event in the LHCD operations could be reduced to minimum via the new engineering design.
资助项目	Research Plan on Experimental Advanced Superconducting Tokamak (EAST) In-Vessel Maintenance[O75ETYM301] ; Science Foundation within the Institute of Plasma Physics, Chinese Academy of Sciences[Y45ETY2302]
WOS关键词	ION-CYCLOTRON ; ANTENNAS ; DIVERTOR ; PLASMA
WOS研究方向	Physics
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000777132100001
资助机构	Research Plan on Experimental Advanced Superconducting Tokamak (EAST) In-Vessel Maintenance ; Science Foundation within the Institute of Plasma Physics, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128653]
专题	中国科学院合肥物质科学研究院
通讯作者	Yao, Damao
作者单位	1.West Anhui Univ, Fac Mech & Automot Engn, Luan 237012, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Liu, Changle,Zhang, Liangliang,Cao, Lei,et al. The Tungsten Guard Limiter of 4.6 GHz Lower Hybrid Current Drive Under EAST Operations[J]. IEEE TRANSACTIONS ON PLASMA SCIENCE,2022,50.
APA	Liu, Changle.,Zhang, Liangliang.,Cao, Lei.,Li, Lei.,Liu, Liang.,...&Yao, Damao.(2022).The Tungsten Guard Limiter of 4.6 GHz Lower Hybrid Current Drive Under EAST Operations.IEEE TRANSACTIONS ON PLASMA SCIENCE,50.
MLA	Liu, Changle,et al."The Tungsten Guard Limiter of 4.6 GHz Lower Hybrid Current Drive Under EAST Operations".IEEE TRANSACTIONS ON PLASMA SCIENCE 50(2022).