Effects of<italic>q</italic>-profiles of a weak magnetic shear on energetic ion excited<italic>q</italic>= 1 mode in tokamak plasmas

Effects ofq-profiles of a weak magnetic shear on energetic ion excitedq= 1 mode in tokamak plasmas

Li Ze-Yu¹, Wang Xian-Qu^{2, †,}, Wang Xiao-Gang³

Two types ofq-profiles in different magnetic shear regimes, the monotonicq(r) =q₀(1 + 0.8r^α)²with the positive magnetic shear (the blue solid), and the nonmonotonicq(r) =q_min+q_c(1 − (r/r_m)^α)²with a reversed magnetic shear (the red dashed).