DIII-D research advancing the physics basis for optimizing the tokamak approach to fusion energy

doi:10.1088/1741-4326/ac2ff2

	DIII-D research advancing the physics basis for optimizing the tokamak approach to fusion energy
	Fenstermacher, M. E.10; Abbate, J.11; Abe, S.12; Abrams, T.13; Adams, M.13; Adamson, B.13; Aiba, N.14; Akiyama, T.13; Aleynikov, P.15; Allen, E.13
刊名	NUCLEAR FUSION
	2022-04-01
卷号	62
关键词	DIII-D tokamak fusion energy plasma physics core-edge integration
ISSN号	0029-5515
DOI	10.1088/1741-4326/ac2ff2
通讯作者	Fenstermacher, M. E.(fenstermacher1@llnl.gov)
英文摘要	DIII-D physics research addresses critical challenges for the operation of ITER and the next generation of fusion energy devices. This is done through a focus on innovations to provide solutions for high performance long pulse operation, coupled with fundamental plasma physics understanding and model validation, to drive scenario development by integrating high performance core and boundary plasmas. Substantial increases in off-axis current drive efficiency from an innovative top launch system for EC power, and in pressure broadening for Alfven eigenmode control from a co-/counter-I (p) steerable off-axis neutral beam, all improve the prospects for optimization of future long pulse/steady state high performance tokamak operation. Fundamental studies into the modes that drive the evolution of the pedestal pressure profile and electron vs ion heat flux validate predictive models of pedestal recovery after ELMs. Understanding the physics mechanisms of ELM control and density pumpout by 3D magnetic perturbation fields leads to confident predictions for ITER and future devices. Validated modeling of high-Z shattered pellet injection for disruption mitigation, runaway electron dissipation, and techniques for disruption prediction and avoidance including machine learning, give confidence in handling disruptivity for future devices. For the non-nuclear phase of ITER, two actuators are identified to lower the L-H threshold power in hydrogen plasmas. With this physics understanding and suite of capabilities, a high poloidal beta optimized-core scenario with an internal transport barrier that projects nearly to Q = 10 in ITER at similar to 8 MA was coupled to a detached divertor, and a near super H-mode optimized-pedestal scenario with co-I (p) beam injection was coupled to a radiative divertor. The hybrid core scenario was achieved directly, without the need for anomalous current diffusion, using off-axis current drive actuators. Also, a controller to assess proximity to stability limits and regulate beta (N) in the ITER baseline scenario, based on plasma response to probing 3D fields, was demonstrated. Finally, innovative tokamak operation using a negative triangularity shape showed many attractive features for future pilot plant operation.
资助项目	US Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-FC0204ER54698] ; US Department of Energy, Office of Science, Office of Fusion Energy Sciences[DE-AC52-07NA27344]
WOS关键词	MITIGATION ; SCENARIOS
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000785591600001
资助机构	US Department of Energy, Office of Science, Office of Fusion Energy Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131414]
专题	中国科学院合肥物质科学研究院
通讯作者	Fenstermacher, M. E.
作者单位	1.Georgia Tech, Atlanta, GA USA 2.Univ British Columbia, Vancouver, BC, Canada 3.Pacific Northwest Natl Lab, Richland, WA 99352 USA 4.ORISE, Oak Ridge, TN USA 5.Univ Sci & Technol China, Hefei, Peoples R China 6.Univ Calif Davis, Davis, CA 95616 USA 7.ASIPP, Hefei, Peoples R China 8.Peking Univ, Beijing, Peoples R China 9.Univ Calif Irvine, Irvine, CA USA 10.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
推荐引用方式 GB/T 7714	Fenstermacher, M. E.,Abbate, J.,Abe, S.,et al. DIII-D research advancing the physics basis for optimizing the tokamak approach to fusion energy[J]. NUCLEAR FUSION,2022,62.
APA	Fenstermacher, M. E..,Abbate, J..,Abe, S..,Abrams, T..,Adams, M..,...&Zuin, M..(2022).DIII-D research advancing the physics basis for optimizing the tokamak approach to fusion energy.NUCLEAR FUSION,62.
MLA	Fenstermacher, M. E.,et al."DIII-D research advancing the physics basis for optimizing the tokamak approach to fusion energy".NUCLEAR FUSION 62(2022).