Numerical calculations of resistive internal kink mode with effects of energetic particles(EPs) on HL-2A have been performed using the hybrid kinetic-MHD model inplemented in the NIMROD code.The m/n=1/1 resistive inte...Numerical calculations of resistive internal kink mode with effects of energetic particles(EPs) on HL-2A have been performed using the hybrid kinetic-MHD model inplemented in the NIMROD code.The m/n=1/1 resistive internal kink mode is unstable in MHD limit.However, with kinetic effects of energetic ions, a fishbone mode is excited with mode frequency around 10 kHz.We calculate the impact of resistivity on the growth rate and frequency of ion fishbone mode,and the results are in good agreement with the analytic solutions, which are obtained by solving the fishbone dispertion relation including resistivity effect.The effects of βfracand cut off velocity of EP on fishbone mode are calculated in detail, where βfracis the ratio of EP pressure to background plasma pressure.This work presents a clear explanation of the stabilizing effect of ECRH on ion fishbone, which is first observed on HL-2A.展开更多
基金supported by the National Magnetic Confinement Fusion Program (Nos.2014GB110000, 2014GB124002 and 2015GB101004)National Natural Science Foundation of China (Nos.11475058, 11875253 and 11775221)+1 种基金the Fundamental Research Funds for the Central Universities (No.WK3420000004)the supports from US Department of Energy (Nos.DE-FG0286ER53218 and DE-FC02-08ER54975)
文摘Numerical calculations of resistive internal kink mode with effects of energetic particles(EPs) on HL-2A have been performed using the hybrid kinetic-MHD model inplemented in the NIMROD code.The m/n=1/1 resistive internal kink mode is unstable in MHD limit.However, with kinetic effects of energetic ions, a fishbone mode is excited with mode frequency around 10 kHz.We calculate the impact of resistivity on the growth rate and frequency of ion fishbone mode,and the results are in good agreement with the analytic solutions, which are obtained by solving the fishbone dispertion relation including resistivity effect.The effects of βfracand cut off velocity of EP on fishbone mode are calculated in detail, where βfracis the ratio of EP pressure to background plasma pressure.This work presents a clear explanation of the stabilizing effect of ECRH on ion fishbone, which is first observed on HL-2A.
