Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D

doi:10.1088/1741-4326/aa7644

	Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D
	Covele, B.1; Kotschenreuther, M.2; Mahajan, S.2; Valanju, P.2; Leonard, A.1; Watkins, J.3; Makowski, M.4; Fenstermacher, M.4; Si, H.5
	2017-08-01
发表期刊	NUCLEAR FUSION
摘要	The X-divertor geometry on DIII-D has demonstrated reduced particle and heat fluxes to the target, facilitating detachment onset at 10-20% lower upstream density and higher H-mode pedestal pressure than a standard divertor. SOLPS modeling suggests that this effect cannot be explained by an increase in total connection length alone, but rather by the addition of connection length specifically in the power-dissipating volume near the target, via poloidal flux expansion and flaring. However, poloidal flaring must work synergistically with divertor closure to most effectively reduce the detachment density threshold. The model also points to carbon radiation as the primary driver of power dissipation in divertors on the DIII-D floor, which is consistent with experimental observations. Sustainable divertor detachment at lower density has beneficial consequences for energy confinement and current drive efficiency for core operation, while simultaneously satisfying the exhaust requirements of the plasma-facing components.
文章类型	Article
关键词	X-divertor Detachment Diii-d Flux Expansion Magnetic Geometry Divertor
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1088/1741-4326/aa7644
关键词[WOS]	PLASMA
收录类别	SCI
语种	英语
项目资助者	U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; U.S. DOE(DE-FC02-04ER54698 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; National Natural Science Foundation of China(11505234 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; DE-FG02-04ER54754 ; 11347113) ; 11347113) ; 11347113) ; 11347113) ; 11347113) ; 11347113) ; 11347113) ; 11347113) ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-FG03-96ER54366 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC52-07NA27344 ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000) ; DE-AC04-94AL85000)
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000404276400001
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/31967
专题	中科院等离子体物理研究所
作者单位	1.Gen Atom, San Diego, CA 92121 USA 2.Univ Texas Austin, Austin, TX 78712 USA 3.Sandia Natl Labs, Albuquerque, NM USA 4.Lawrence Livermore Natl Lab, Livermore, CA USA 5.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Covele, B.,Kotschenreuther, M.,Mahajan, S.,et al. Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D[J]. NUCLEAR FUSION,2017,57(8):1-10.
APA	Covele, B..,Kotschenreuther, M..,Mahajan, S..,Valanju, P..,Leonard, A..,...&Si, H..(2017).Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D.NUCLEAR FUSION,57(8),1-10.
MLA	Covele, B.,et al."Increased heat dissipation with the X-divertor geometry facilitating detachment onset at lower density in DIII-D".NUCLEAR FUSION 57.8(2017):1-10.

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