Global Gyrokinetic Simulation of Tokamak Edge Pedestal Instabilities

被引：48
作者：
Wan, Weigang [1 ]
Parker, Scott E. [1 ]
Chen, Yang [1 ]
Yan, Zheng [2 ]
Groebner, Richard J. [3 ]
Snyder, Philip B. [3 ]
机构：
[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[2] Univ Wisconsin, Madison, WI 53706 USA
[3] Gen Atom Co, San Diego, CA 92186 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 18期
关键词：
TRANSPORT; MICROTURBULENCE; ITER;
D O I：
10.1103/PhysRevLett.109.185004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Global electromagnetic gyrokinetic simulations show the existence of near threshold conditions for both a high-n kinetic ballooning mode (KBM) and an intermediate-n kinetic version of peeling-ballooning mode (KPBM) in the edge pedestal of two DIII-D H-mode discharges. When the magnetic shear is reduced in a narrow region of steep pressure gradient, the KPBM is significantly stabilized, while the KBM is weakly destabilized and hence becomes the most-unstable mode. Collisions decrease the KBM's critical beta and increase the growth rate.
引用
收藏
页数：5
相关论文
共 50 条
  • [31] Investigating the radial structure of axisymmetric fluctuations in the TCV tokamak with local and global gyrokinetic GENE simulations
    Merlo, G.
    Brunner, S.
    Huang, Z.
    Coda, S.
    Gorler, T.
    Villard, L.
    Navarro, A. Banon
    Dominski, J.
    Fontana, M.
    Jenko, F.
    Porte, L.
    Told, D.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2018, 60 (03)
  • [32] Formation of a High Pressure Staircase Pedestal with Suppressed Edge Localized Modes in the DIII-D Tokamak
    Ashourvan, Arash
    Nazikian, R.
    Belli, E.
    Candy, J.
    Eldon, D.
    Grierson, B. A.
    Guttenfelder, W.
    Haskey, S. R.
    Lasnier, C.
    McKee, G. R.
    Petty, C. C.
    PHYSICAL REVIEW LETTERS, 2019, 123 (11)
  • [33] Impact of shape on pedestal characteristics in the wide pedestal quiescent H-mode in the DIII-D tokamak
    Wilks, T. M.
    Morton, L. A.
    Kriete, D. M.
    Knolker, M.
    Snyder, P. B.
    Barada, K.
    Paz-Soldan, C.
    Rhodes, T.
    Burrell, K. H.
    Chen, X.
    Hughes, J. W.
    NUCLEAR FUSION, 2021, 61 (03)
  • [34] Upper Bounds on Gyrokinetic Instabilities in Magnetized Plasmas
    Helander, P.
    Plunk, G. G.
    PHYSICAL REVIEW LETTERS, 2021, 127 (15)
  • [35] Observation of Pedestal Plasma Turbulence on EAST Tokamak
    Gao Xiang
    Zhang Tao
    Han Xiang
    Zhang Shoubiao
    Wang Yumin
    Liu Zixi
    Yang Yao
    Liu Shaocheng
    Shi Nan
    Ling Bili
    Li Jiangang
    PLASMA SCIENCE & TECHNOLOGY, 2013, 15 (08) : 732 - 737
  • [36] Intrinsic Toroidal Rotation Driven by Turbulent and Neoclassical Processes in Tokamak Plasmas from Global Gyrokinetic Simulations
    Zhu, Hongxuan
    Stoltzfus-Dueck, T.
    Hager, R.
    Ku, S.
    Chang, C. S.
    PHYSICAL REVIEW LETTERS, 2024, 133 (02)
  • [37] Spectral transition of multiscale turbulence in the tokamak pedestal
    Belli, E. A.
    Candy, J.
    Sfiligoi, I
    PLASMA PHYSICS AND CONTROLLED FUSION, 2023, 65 (02)
  • [38] Linear simulation of kinetic electromagnetic instabilities in a tokamak plasma with weak magnetic shear
    Zhao, Yunchuan
    Wang, Jiaqi
    Liu, Dongjian
    Chen, Wei
    Dong, Ge
    Lin, Zhihong
    PHYSICS OF PLASMAS, 2021, 28 (01)
  • [39] Gyrokinetic study of ASDEX Upgrade inter-ELM pedestal profile evolution
    Hatch, D. R.
    Told, D.
    Jenko, F.
    Doerk, H.
    Dunne, M. G.
    Wolfrum, E.
    Viezzer, E.
    Pueschel, M. J.
    NUCLEAR FUSION, 2015, 55 (06)
  • [40] Edge gyrokinetic theory and continuum simulations
    Xu, X. Q.
    Xiong, Z.
    Dorr, M. R.
    Hittinger, J. A.
    Bodi, K.
    Candy, J.
    Cohen, B. I.
    Cohen, R. H.
    Colella, P.
    Kerbel, G. D.
    Krasheninnikov, S.
    Nevins, W. M.
    Qin, H.
    Rognlien, T. D.
    Snyder, P. B.
    Umansky, M. V.
    NUCLEAR FUSION, 2007, 47 (08) : 809 - 816
12345