Effects of electron cyclotron current drive on magnetic islands in tokamak plasmas

Li, J. C.; Xiao, C. J.; Lin, Z. H.; Wang, K. J.

doi:10.1063/1.4996021

Title: Effects of electron cyclotron current drive on magnetic islands in tokamak plasmas

Journal Article · Thu Jul 27 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4996021· OSTI ID:1497876

Li, J. C. ^[1]; Xiao, C. J. ^[1]; Lin, Z. H. ^[2]; Wang, K. J. ^[1]

Peking Univ., Beijing (People's Republic of China)
Peking Univ., Beijing (People's Republic of China); Univ. of California, Irvine, CA (United States)

The effects of the electron cyclotron current drive on magnetic islands in tokamak plasmas are studied using gyrokinetic simulations. By investigating the effects of different characteristics of the driven current, such as current density distribution and deposition location, the factors which can determine the suppression effect on the resistive tearing modes have been explored. It is found that an electron cyclotron wave (ECW) driven current with a larger peak value and more focused deposition region has a better stabilization effect. When the ECW-driven current is closer to the rational surface, it has a better stabilizing effect. These gyrokinetic toroidal code (GTC) linear simulations in the electron fluid limit of the tearing modes in the cylindrical geometry agree well with the magnetohydrodynamic codes. In conclusion, the optimal timing control of the current deposition on resistive tearing modes is demonstrated.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE

OSTI ID:: 1497876

Journal Information:: Physics of Plasmas, Vol. 24, Issue 8; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 15 works

Citation information provided by
Web of Science

References (36)

Complete Suppression of Neoclassical Tearing Modes with Current Drive at the Electron-Cyclotron-Resonance Frequency in ASDEX Upgrade Tokamak Gantenbein, G.; Zohm, H.; Giruzzi, G. Physical Review Letters, Vol. 85, Issue 6 https://doi.org/10.1103/PhysRevLett.85.1242	journal	August 2000
Transport of Energetic Particles by Microturbulence in Magnetized Plasmas Zhang, Wenlu; Lin, Zhihong; Chen, Liu Physical Review Letters, Vol. 101, Issue 9 https://doi.org/10.1103/PhysRevLett.101.095001	journal	August 2008
Numerical study on the stabilization of neoclassical tearing modes by electron cyclotron current drive Wang, Xiaoguang; Zhang, Xiaodong; Wu, Bin Physics of Plasmas, Vol. 22, Issue 2 https://doi.org/10.1063/1.4913352	journal	February 2015
Hamiltonian guiding center drift orbit calculation for plasmas of arbitrary cross section White, R. B.; Chance, M. S. Physics of Fluids, Vol. 27, Issue 10 https://doi.org/10.1063/1.864527	journal	January 1984
Long sustainment of quasi-steady-state high _p H mode discharges in JT-60U Isayama, A.; Kamada, Y.; Ozeki, T. Nuclear Fusion, Vol. 41, Issue 6 https://doi.org/10.1088/0029-5515/41/6/312	journal	June 2001
Enhancement of the Stabilization Efficiency of a Neoclassical Magnetic Island by Modulated Electron Cyclotron Current Drive in the ASDEX Upgrade Tokamak Maraschek, M.; Gantenbein, G.; Yu, Q. Physical Review Letters, Vol. 98, Issue 2 https://doi.org/10.1103/PhysRevLett.98.025005	journal	January 2007
Influence of Energetic Ions on Tearing Modes Cai, Huishan; Wang, Shaojie; Xu, Yinfeng Physical Review Letters, Vol. 106, Issue 7 https://doi.org/10.1103/PhysRevLett.106.075002	journal	February 2011
Electromagnetic formulation of global gyrokinetic particle simulation in toroidal geometry Holod, I.; Zhang, W. L.; Xiao, Y. Physics of Plasmas, Vol. 16, Issue 12 https://doi.org/10.1063/1.3273070	journal	December 2009
Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. II. Resistive tearing mode Liu, Dongjian; Zhang, Wenlu; McClenaghan, Joseph Physics of Plasmas, Vol. 21, Issue 12 https://doi.org/10.1063/1.4905074	journal	December 2014
Numerical study on the influence of electron cyclotron current drive on tearing mode Chen, Long; Liu, Jinyuan; Duan, Ping Physics of Plasmas, Vol. 21, Issue 10 https://doi.org/10.1063/1.4897396	journal	October 2014
Nonlinear growth of the tearing mode Rutherford, P. H. Physics of Fluids, Vol. 16, Issue 11 https://doi.org/10.1063/1.1694232	journal	January 1973
Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. I. Internal kink mode McClenaghan, J.; Lin, Z.; Holod, I. Physics of Plasmas, Vol. 21, Issue 12 https://doi.org/10.1063/1.4905073	journal	December 2014
Numerical studies on the stabilization of neoclassical tearing modes by radio frequency current drive Yu, Q.; Zhang, X. D.; Günter, S. Physics of Plasmas, Vol. 11, Issue 5 https://doi.org/10.1063/1.1710521	journal	May 2004
Dynamical modelling of tearing mode stabilization by RF current drive Giruzzi, G.; Zabiégo, M.; Gianakon, T. A. Nuclear Fusion, Vol. 39, Issue 1 https://doi.org/10.1088/0029-5515/39/1/307	journal	January 1999
Calculating electron cyclotron current drive stabilization of resistive tearing modes in a nonlinear magnetohydrodynamic model Jenkins, Thomas G.; Kruger, Scott E.; Hegna, C. C. Physics of Plasmas, Vol. 17, Issue 1 https://doi.org/10.1063/1.3276740	journal	January 2010
Experiments on neoclassical tearing mode stabilization by ECCD in ASDEX Upgrade Zohm, H.; Gantenbein, G.; Giruzzi, G. Nuclear Fusion, Vol. 39, Issue 5 https://doi.org/10.1088/0029-5515/39/5/101	journal	May 1999
Turbulent Transport of Trapped-Electron Modes in Collisionless Plasmas Xiao, Yong; Lin, Zhihong Physical Review Letters, Vol. 103, Issue 8 https://doi.org/10.1103/PhysRevLett.103.085004	journal	August 2009
Achievement of high fusion triple product, steady-state sustainment and real-time NTM stabilization in high- _p ELMy H-mode discharges in JT-60U Isayama, A.; Kamada, Y.; Hayashi, N. Nuclear Fusion, Vol. 43, Issue 10 https://doi.org/10.1088/0029-5515/43/10/031	journal	October 2003
Neoclassical Transport in Enhanced Confinement Toroidal Plasmas Lin, Z.; Tang, W. M.; Lee, W. W. Physical Review Letters, Vol. 78, Issue 3 https://doi.org/10.1103/PhysRevLett.78.456	journal	January 1997
A fully nonlinear characteristic method for gyrokinetic simulation Parker, S. E.; Lee, W. W. Physics of Fluids B: Plasma Physics, Vol. 5, Issue 1 https://doi.org/10.1063/1.860870	journal	January 1993
Numerical studies of electron cyclotron wave current drive on HL-2A tokamak Li, J. C.; Gong, X. Y.; Dong, J. Q. Physics of Plasmas, Vol. 22, Issue 6 https://doi.org/10.1063/1.4923303	journal	June 2015
Current drive with combined electron cyclotron wave and high harmonic fast wave in tokamak plasmas Li, J. C.; Gong, X. Y.; Dong, J. Q. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4971442	journal	December 2016
A finite element Poisson solver for gyrokinetic particle simulations in a global field aligned mesh Nishimura, Y.; Lin, Z.; Lewandowski, J. L. V. Journal of Computational Physics, Vol. 214, Issue 2 https://doi.org/10.1016/j.jcp.2005.10.011	journal	May 2006
Complete suppression of the m = 2/ n = 1 neoclassical tearing mode using electron cyclotron current drive in DIII-D Petty, C. C.; Haye, R. J. La; Luce, T. C. Nuclear Fusion, Vol. 44, Issue 2 https://doi.org/10.1088/0029-5515/44/2/004	journal	January 2004
Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations Lin, Z. Science, Vol. 281, Issue 5384 https://doi.org/10.1126/science.281.5384.1835	journal	September 1998
Wave-Particle Decorrelation and Transport of Anisotropic Turbulence in Collisionless Plasmas Lin, Z.; Holod, I.; Chen, L. Physical Review Letters, Vol. 99, Issue 26 https://doi.org/10.1103/PhysRevLett.99.265003	journal	December 2007
Control of neoclassical tearing modes in DIII–D La Haye, R. J.; Günter, S.; Humphreys, D. A. Physics of Plasmas, Vol. 9, Issue 5 https://doi.org/10.1063/1.1456066	journal	May 2002
Coupling extended magnetohydrodynamic fluid codes with radiofrequency ray tracing codes for fusion modeling Jenkins, Thomas G.; Held, Eric D. Journal of Computational Physics, Vol. 297 https://doi.org/10.1016/j.jcp.2015.05.035	journal	September 2015
Neoclassical tearing modes and their control La Haye, R. J. Physics of Plasmas, Vol. 13, Issue 5 https://doi.org/10.1063/1.2180747	journal	May 2006
Stabilization of neoclassical tearing modes by electron cyclotron current drive Zohm, Hartmut Physics of Plasmas, Vol. 4, Issue 9 https://doi.org/10.1063/1.872487	journal	September 1997
Modeling of the stabilization of neoclassical tearing modes by localized radio frequency current drive Yu, Q.; Günter, S.; Giruzzi, G. Physics of Plasmas, Vol. 7, Issue 1 https://doi.org/10.1063/1.873799	journal	January 2000
On the stabilization of neoclassical magnetohydrodynamic tearing modes using localized current drive or heating Hegna, C. C.; Callen, J. D. Physics of Plasmas, Vol. 4, Issue 8 https://doi.org/10.1063/1.872426	journal	August 1997
Modification of Δ′ by magnetic feedback and kinetic effects Liu, Yueqiang; Hastie, R. J.; Hender, T. C. Physics of Plasmas, Vol. 19, Issue 9 https://doi.org/10.1063/1.4754281	journal	September 2012
The physics of neoclassical magnetohydrodynamic tearing modes Hegna, C. C. Physics of Plasmas, Vol. 5, Issue 5 https://doi.org/10.1063/1.872846	journal	May 1998
Nonlinear Frequency Oscillation of Alfvén Eigenmodes in Fusion Plasmas Zhang, H. S.; Lin, Z.; Holod, I. Physical Review Letters, Vol. 109, Issue 2 https://doi.org/10.1103/PhysRevLett.109.025001	journal	July 2012
Radial Localization of Toroidicity-Induced Alfvén Eigenmodes Wang, Zhixuan; Lin, Zhihong; Holod, Ihor Physical Review Letters, Vol. 111, Issue 14 https://doi.org/10.1103/PhysRevLett.111.145003	journal	October 2013

Cited By (2)

Induction and stabilization of neoclassical tearing modes on HL-2A tokamak Li, Jingchun; Ji, Xiaoquan; Dong, Jiaqi Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5087695	journal	March 2019
RF current condensation in magnetic islands and associated hysteresis phenomena Rodríguez, E.; Reiman, A. H.; Fisch, N. J. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5118424	journal	September 2019