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E x B flow shear drive of the linear low-n modes of EHO in the QH-mode regime

文献类型：期刊论文

作者Xu, G. S.1,2; Wan, B. N.1; Wang, Y. F.1,2; Wu, X. Q.1; Chen, Xi3; Peng, Y. -K. Martin2; Guo, H. Y.1,3; Burrell, K. H.3; Garofalo, A. M.3; Osborne, T. H.3
刊名NUCLEAR FUSION
出版日期2017-08-01
卷号57期号:8
关键词e x b Flow Shear Qh-mode Eho Low-n Kink/peeling Mode Diii-d
DOI10.1088/1741-4326/aa7975
文献子类Article
英文摘要A new model for the edge harmonic oscillations (EHOs) in the quiescent H-mode regime has been developed, which successfully reproduces the recent observations in the DIII-D tokamak. In particular, at high E x B flow shear only a few low-n kink modes remain unstable at the plasma edge, consistent with the EHO behavior, while at low E x B flow shear, the unstable mode spectrum is significantly broadened, consistent with the low-n broadband electromagnetic turbulence behavior. The model is based on a new mechanism for destabilizing low-n kink/peeling modes by the E x B flow shear, which underlies the EHOs, separately from the previously found Kelvin-Helmholtz drive. We find that the differential advection of mode vorticity by sheared E x B flows modifies the 2D pattern of mode electrostatic potential perpendicular to the magnetic field lines, which in turn causes a radial expansion of the mode structure, an increase of field line bending away from the mode rational surface, and a reduction of inertial stabilization. This enhances the kink drive as the parallel wavenumber increases significantly away from the rational surface at the plasma edge where the magnetic shear is also strong. This destabilization is also shown to be independent of the sign of the flow shear, as observed experimentally, and has not been taken into account in previous pedestal linear stability analyses. Verification of the veracity of this EHO mechanism will require analysis of the nonlinear evolution of low-n kink/peeling modes so destabilized in the linear regime.
WOS关键词DIII-D TOKAMAK ; COLLISIONALITY REGIME ; PLASMA ROTATION ; EDGE ; CONFINEMENT ; TURBULENCE ; PHYSICS ; ENERGY
WOS研究方向Physics
语种英语
WOS记录号WOS:000405825700001
资助机构National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; Key Research Program of Frontier Sciences, CAS(QYZDB-SSWSLH001) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; U.S. Department of Energy(DE-FC02-04ER56498) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003) ; 2013GB106003)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33521]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
3.Gen Atom, POB 85608, San Diego, CA 92186 USA
推荐引用方式
GB/T 7714		 Xu, G. S.,Wan, B. N.,Wang, Y. F.,et al. E x B flow shear drive of the linear low-n modes of EHO in the QH-mode regime[J]. NUCLEAR FUSION,2017,57(8).
APA Xu, G. S..,Wan, B. N..,Wang, Y. F..,Wu, X. Q..,Chen, Xi.,...&Li, J..(2017).E x B flow shear drive of the linear low-n modes of EHO in the QH-mode regime.NUCLEAR FUSION,57(8).
MLA Xu, G. S.,et al."E x B flow shear drive of the linear low-n modes of EHO in the QH-mode regime".NUCLEAR FUSION 57.8(2017).

入库方式： OAI收割

来源：合肥物质科学研究院

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