Figure 4

(left) D plasmas and (right) H plasmas. (a,b) The line averaged density dependence of the inverse ion temperature gradient length at \({r}_{{\rm{e}}ff}/{a}_{99}\mathrm{=0.6}\) and \({r}_{{\rm{eff}}}/{a}_{99}=0.8\) and (c,d) diagram of ion heat flux versus inverse ion temperature gradient length when the ITB is formed.