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
       

Time evolutions of total impurity density profiles, obtained from simulations of (a) Ohmic and (b) ECRH discharges, with the unit being m−3. Total impurity density profiles (c) in the Ohmic case and (d) in the ECRH case at respective time, t1: maximum density, t2: maximum central density, t3: central soft x-ray signal decay to 20% of the maximum.