Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. III. Collisionless tearing mode

A finite-mass electron fluid model for low frequency electromagnetic fluctuations, particularly the collisionless tearing mode, has been implemented in the gyrokinetic toroidal code. Using this fluid model, linear properties of the collisionless tearing mode have been verified. Simulations verify that the linear growth rate of the single collisionless tearing mode is proportional to D-e(2), where D-e is the electron skin depth. On the other hand, the growth rate of a double tearing mode is proportional to D-e in the parameter regime of fusion plasmas. (C) 2016 AIP Publishing LLC.U.S. DOE SciDAC GSEP Center, China National Magnetic Confinement Fusion Science Program [2013GB111000, 2013GB112005, 2015GB110004]; National Natural Science Foundation of China [11205109, 11275162]; DOE [DE-AC05-00OR22725]; National Energy Research Scientific Computing Center (DOE) [DE-AC02-05CH11231]SCI(E)EIARTICLEzhihongl@uci.edu22