Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability

doi:10.1088/1741-4326/abc7ec

	Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability
	Liu, Lunan 2,3; Ochoukov, R.5; McClements, K. G.6; Dendy, R. O.6,7; Bobkov, V 5; Weiland, M.5; Bilato, R.5; Faugel, H.5; Moseev, D.1; Salewski, M.8
刊名	NUCLEAR FUSION
	2021-02-01
卷号	61
关键词	magnetoacoustic cyclotron instability ion cyclotron emission sub-Alfvé nic beam injected ions ASDEX Upgrade tokamak
ISSN号	0029-5515
DOI	10.1088/1741-4326/abc7ec
通讯作者	Liu, Lunan(liulunan@ipp.ac.cn)
英文摘要	Bursts of ion cyclotron emission (ICE), with spectral peaks corresponding to the hydrogen cyclotron harmonic frequencies in the plasma core are detected from helium plasmas heated by sub-Alfvenic beam-injected hydrogen ions in the ASDEX Upgrade tokamak. Based on the fast ion distribution function obtained from TRANSP/NUBEAM code, together with a linear analytical theory of the magnetoacoustic cyclotron instability (MCI), the growth rates of MCI could be calculated. In our theoretical and experimental studies, we found that the excitation mechanism of core ICE driven by sub-Alfvenic beam ions in ASDEX Upgrade is MCI as the time evolution of MCI growth rates is broadly consistent with measured ICE amplitudes. The MCI growth rate is very sensitive to the energy and velocity distribution of beam-injected ions and is suppressed by the slowing down of the dominant beam-injected ion velocity and the spreading of the fast ion distribution profile. This may help to account for the experimental observation that ICE signals disappear within similar to 3 ms after the NBI turn-off time, much faster than the slowing down times of the beam ions.
资助项目	Euratom research and training programme[633053] ; RCUK Energy Programme[EP/T012250/1] ; National Natural Science Foundation of China[11975265] ; National Natural Science Foundation of China[11675213] ; National Natural Science Foundation of China[11628509]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000618025900001
资助机构	Euratom research and training programme ; RCUK Energy Programme ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/119596]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Lunan
作者单位	1.Max Planck Inst Plasma Phys, Wendelsteinstra 1, D-17491 Greifswald, Germany 2.Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 4.Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China 5.Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany 6.Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England 7.Univ Warwick, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England 8.Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark
推荐引用方式 GB/T 7714	Liu, Lunan,Ochoukov, R.,McClements, K. G.,et al. Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability[J]. NUCLEAR FUSION,2021,61.
APA	Liu, Lunan.,Ochoukov, R..,McClements, K. G..,Dendy, R. O..,Bobkov, V.,...&Zalzali, A..(2021).Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability.NUCLEAR FUSION,61.
MLA	Liu, Lunan,et al."Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability".NUCLEAR FUSION 61(2021).