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Exciting and propagating characteristics of two coexisting kinetic geodesic acoustic modes in the edge of plasma
Kong, D. F.1,2; Liu, A. D.2; Lan, T.2; Yu, C. X.2; Cheng, J.3; Qiu, Z. Y.5; Zhao, H. L.1,2; Shen, H. G.2; Yan, L. W.3; Dong, J. Q.3; Xu, M.3; Zhao, K. J.3; Duan, X. R.3; Liu, Y.3; Chen, R.1; Zhang, S. B.1; Sun, X.2; Xie, J. L.2; Li, H.2; Liu, W. D.2
2017-04-01
Source PublicationNUCLEAR FUSION
Volume57Issue:4
AbstractCoexisting dual kinetic geodesic acoustic modes (KGAMs) with similar characteristics have been observed with Langmuir probe arrays in the edge plasma of HL-2A tokamak with low density Ohmic discharge. The dual KGAMs are named a low-frequency GAM (LFGAM) and a high-frequency GAM (HFGAM), respectively. By changing the line averaged density from 1.0 x 10(19) m(-3) to 0.7 x 10(19) m(-3), the study of ne and Te profiles indicate that collision damping rate plays a crucial role on exciting of dual KGAMs, especially for the higher frequency branch (HFGAM). With the application of modulating techniques, we provide direct proof that nonlinear interactions between GAMs and ambient turbulence (AT) show great difference at different radial positions. At the exciting position of GAM, the amplitude modulation of AT is dominant, indicating that GAM is generated in the energy-conserving triad interaction. After the exciting of GAMs, they will propagate both inward and outward. During the propagation, the phase modulation of AT is dominant, GAMs can rarely gain energy from AT, yet they can give back-reactions on AT through shearing effect.
SubtypeArticle
KeywordZonal Flow Kinetic Gam Ambient Turbulence
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNSFC(10990210 ; NSFC(10990210 ; China National Fusion Project for ITER(2014GB106000 ; China National Fusion Project for ITER(2014GB106000 ; HL-2A Team ; HL-2A Team ; 10990211 ; 10990211 ; 2013GB106002 ; 2013GB106002 ; 11405214 ; 11405214 ; 2014GB106003) ; 2014GB106003) ; 11375188 ; 11375188 ; 11275234 ; 11275234 ; 11305208 ; 11305208 ; 11305215 ; 11305215 ; 11505221) ; 11505221) ; NSFC(10990210 ; NSFC(10990210 ; China National Fusion Project for ITER(2014GB106000 ; China National Fusion Project for ITER(2014GB106000 ; HL-2A Team ; HL-2A Team ; 10990211 ; 10990211 ; 2013GB106002 ; 2013GB106002 ; 11405214 ; 11405214 ; 2014GB106003) ; 2014GB106003) ; 11375188 ; 11375188 ; 11275234 ; 11275234 ; 11305208 ; 11305208 ; 11305215 ; 11305215 ; 11505221) ; 11505221)
DOI10.1088/1741-4326/aa5c62
WOS KeywordZONAL FLOWS ; DIII-D ; TOKAMAK ; TURBULENCE
Indexed BySCI
Language英语
Funding OrganizationNSFC(10990210 ; NSFC(10990210 ; China National Fusion Project for ITER(2014GB106000 ; China National Fusion Project for ITER(2014GB106000 ; HL-2A Team ; HL-2A Team ; 10990211 ; 10990211 ; 2013GB106002 ; 2013GB106002 ; 11405214 ; 11405214 ; 2014GB106003) ; 2014GB106003) ; 11375188 ; 11375188 ; 11275234 ; 11275234 ; 11305208 ; 11305208 ; 11305215 ; 11305215 ; 11505221) ; 11505221) ; NSFC(10990210 ; NSFC(10990210 ; China National Fusion Project for ITER(2014GB106000 ; China National Fusion Project for ITER(2014GB106000 ; HL-2A Team ; HL-2A Team ; 10990211 ; 10990211 ; 2013GB106002 ; 2013GB106002 ; 11405214 ; 11405214 ; 2014GB106003) ; 2014GB106003) ; 11375188 ; 11375188 ; 11275234 ; 11275234 ; 11305208 ; 11305208 ; 11305215 ; 11305215 ; 11505221) ; 11505221)
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS IDWOS:000405943400002
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33537
Collection中科院等离子体物理研究所
Affiliation1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China
3.Southwestern Inst Phys, POB 432, Chengdu 610041, Sichuan, Peoples R China
4.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China
5.Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Kong, D. F.,Liu, A. D.,Lan, T.,et al. Exciting and propagating characteristics of two coexisting kinetic geodesic acoustic modes in the edge of plasma[J]. NUCLEAR FUSION,2017,57(4).
APA Kong, D. F..,Liu, A. D..,Lan, T..,Yu, C. X..,Cheng, J..,...&Liu, W. D..(2017).Exciting and propagating characteristics of two coexisting kinetic geodesic acoustic modes in the edge of plasma.NUCLEAR FUSION,57(4).
MLA Kong, D. F.,et al."Exciting and propagating characteristics of two coexisting kinetic geodesic acoustic modes in the edge of plasma".NUCLEAR FUSION 57.4(2017).
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