The impurity mode in toroidal reversed-field pinch (RFP) plasma is studied, using the gyrokinetic integral equation. A second species of ions with density gradient opposite to the primary ion and electron density gradients is considered. The effects of impurity charge concentration, ratio of electron density gradient scale length to impurity density gradient scale length, finite Larmor radius, safety factor, magnetic shear, ion as well as electron density gradient scale lengths on the impurity mode are investigated in detail. It is demonstrated that the impurity mode in RFP plasmas is relatively more difficult to be excited than that in tokamak plasmas under similar geometry when the density profile is flat, whereas it turns out to be easier when the density profile is rather peaked. Copyright © EPLA, 2012.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Liu, S. F., Zhang, C. L., Kong, W., Guo, S. C., Dong, J. Q., Liu, L. M., ... Liu, Z. Y. (2012). Gyrokinetic study of impurity mode in reversed-field pinch. Europhysics Letters, 97(5), -. . https://doi.org/10.1209/0295-5075/97/55004