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
  • [41] Gyrokinetic simulation of pedestal degradation correlated with enhanced magnetic turbulence in a DIII-D ELMy H-mode discharge
    Jian, X.
    Chen, J.
    Holland, C.
    Chan, V. S.
    Zhang, X. R.
    Yu, G.
    Yan, Z.
    [J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2024, 66 (04)
  • [42] Gyrokinetic simulation study of magnetic island effects on neoclassical physics and micro-instabilities in a realistic KSTAR plasma
    Kwon, Jae-Min
    Ku, S.
    Choi, M. J.
    Chang, C. S.
    Hager, R.
    Yoon, E. S.
    Lee, H. H.
    Kim, H. S.
    [J]. PHYSICS OF PLASMAS, 2018, 25 (05)
  • [43] Particle pinch and collisionality in gyrokinetic simulations of tokamak plasma turbulence
    Angioni, C.
    Candy, J.
    Fable, E.
    Maslov, M.
    Peeters, A. G.
    Waltz, R. E.
    Weisen, H.
    [J]. PHYSICS OF PLASMAS, 2009, 16 (06)
  • [44] Validity limits of the passive treatment of impurities in gyrokinetic tokamak simulations
    Lesur, M.
    Djerroud, C.
    Lim, K.
    Gravier, E.
    Idouakass, M.
    Moritz, J.
    Medina, J.
    Reveille, T.
    Drouot, T.
    Cartier-Michaud, T.
    Garnet, X.
    [J]. NUCLEAR FUSION, 2020, 60 (03)
  • [45] Verification of electromagnetic simulation capabilities in global gyrokinetic particle-in-cell code GTS
    Startsev, Edward A.
    Wang, Weixing
    Yoo, Min-Gu
    Chen, Jin
    Ethier, Stephane
    [J]. PHYSICS OF PLASMAS, 2024, 31 (11)
  • [46] Energetic consistency and momentum conservation in the gyrokinetic description of tokamak plasmas
    Scott, B.
    Smirnov, J.
    [J]. PHYSICS OF PLASMAS, 2010, 17 (11)
  • [47] Gyrokinetic theory of turbulent acceleration and momentum conservation in tokamak plasmas
    Wang, Lu
    Peng, Shuitao
    Diamond, P. H.
    [J]. PLASMA SCIENCE & TECHNOLOGY, 2018, 20 (07)
  • [48] Global gyrokinetic particle simulation of toroidal Alfven eigenmodes excited by antenna and fast ions
    Zhang, Wenlu
    Holod, Ihor
    Lin, Zhihong
    Xiao, Yong
    [J]. PHYSICS OF PLASMAS, 2012, 19 (02)
  • [49] Energetic-ion-driven global instabilities in stellarator/helical plasmas and comparison with tokamak plasmas
    Toi, K.
    Ogawa, K.
    Isobe, M.
    Osakabe, M.
    Spong, D. A.
    Todo, Y.
    [J]. PLASMA PHYSICS AND CONTROLLED FUSION, 2011, 53 (02)
  • [50] Analysis of pedestal gradient characteristic on the Experimental Advanced Superconducting Tokamak
    Wang, Teng Fei
    Han, Xiao Feng
    Zang, Qing
    Xiao, Shu Mei
    Tian, Bao Gang
    Hu, Ai Lan
    Zhao, Jun Yu
    [J]. PHYSICS OF PLASMAS, 2016, 23 (05)
12345