1. Study of Runaway Current Generated by Disruption Jiang Yong, K. Toi and HT-7 WPI Team 2007.4.7 Proposal for 2007 HT-7 spring experimental campaign

2. Objectives (1) To study generation of relativistic runaway electrons (REs) during disruption (2) To search a techniques to replace plasma current (Ip) with RE current with a small Ip-drop by application of LHCD/ICRF

3. Plasma sustained by RE in JET (V. V. Plyusnin, NF 2006) Plasma sustained by RE with LHCD on FTU (J.R. Martin-Solis et al., PRL 2006) Plasma sustained by RE with ECH on JT-60U (Y. Kawano et al., EPS2005)

4. Experimental arrangement OH: I p =100,120 kA n e =0.8,1.0,1.5×10 13 cm -3 I TF =3800,4000 A 1. Search for spontaneous disruptions in HT-7 discharges. 2. Programmed neon gas injection with and without LHCD. 3. Other methods ： change the horizontal position to produce disruption. The parameters is the same as plan 1. LH: I p =100,120 kA n e = 0.8,1.0,1.5 ×10 13 cm -3 I TF =3800,4000 A P LHW =150,250,350 kW OH: I p =100,120,150 kA n e =0.8,1.0,1.5,2.0×10 13 cm -3 I TF =3800,4000 A LH: I p =100,120,150 kA n e = 0.8,1.0,1.5,2.0×10 13 cm -3 I TF =3800,4000 A P LHW =150,250,350 kW * I p should be programme-controlled

5. Needed diagnostics 硬 X 射线诊断 逃逸电子和 Gamma 射线诊断 电磁测量 软 X 射线阵列 ECE 和软 X 射线能谱

6. Thank you for you attention!!!