Abstract：We numerically investigate the effects of ion-to-electron temperature ratio $T_{\rm i}/T_{\rm e}$ and temperature gradient ratio $\eta_{\rm i}/\eta_{\rm e}$ on resistive ballooning modes (RBMs) under tokamak edge plasma conditions. The results show that the growth rates of the RBMs exhibit the characteristic of a quite broad poloidal wavenumber spectrum in the cold ion limit. The growth rate spectrum becomes narrower and the peak of the spectrum shifts from the short to long wavelength side with increasing $T_{\rm i}/T_{\rm e}$ and $\eta_{\rm i}/\eta_{\rm e}$. The electron temperature gradient has a very weak effect on the stability of RBMs. However, the ion-to-electron temperature ratio and the temperature gradient ratio have strong stabilizing effects on short-wavelength RBMs, while they have relatively weak effects on long-wavelength RBMs.
Bourdelle C, Maggi C F, Chôné L, Beyer P, Citrin J, Fedorczak N, Garbet X, Loarte A, Millitello F, Romanelli M, Sarazin Y and Contributors J E 2014 Nucl. Fusion54 022001
Stejner M, Salewski M, Korsholm S B, Bindslev H, Delabie E, Leipold F, Meo F, Michelsen P K, Moseev D, Nielsen S K, Bürger A and de Baar M 2013 Plasma Phys. Control. Fusion55 085002
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Yu D L, Wei Y L, Liu L, Dong J Q, Ida K, Itoh K, Sun A P, Cao J Y, Shi Z B, Wang Z X, Xiao Y, Yuan B S, Du H R, He X X, Chen W J, Ma Q, Itoh S I, Zhao K J, Zhou Y, Wang J, Ji X Q, Zhong W L, Li Y G, Gao J M, Deng W, Yi L, Xu Y, Yan L W, Yang Q W, Ding X T, Duan X R, Yong Liu and Team A 2016 Nucl. Fusion56 056003
2020, Vol. 37 
