Investigation of impurity transport using laser blow-off technique in the HL-2A Ohmic and ECRH plasmas

Zhang Kai^†,, Cui Zheng-Ying, Sun Ping, Dong Chun-Feng, Deng Wei, Dong Yun-Bo, Song Shao-Dong, Jiang Min, Li Yong-Gao, Lu Ping, Yang Qing-Wei

Diffusion coefficient D profiles for (a) Ohmic and (c) ECRH discharge, and convection velocity profiles for (b) Ohmic and (d) ECRH discharge that best reconstruct various lines of sight for soft x-ray brightness.