1. KTX Laboratory and Department of Engineering and Applied Physics, University of Science and Technology of China, Anhui Hefei 230026, China
2. Institute for Magnetic Fusion Research, CEA, F-13115 Saint-Paul-lez-Durance, France
3. Southwestern Institute for Physics, CNNC, C-610200 Chengdu, China
4. Institute of Plasma Physics, Chinese Academy of Sciences, Anhui Hefei 230031,China
5. Hebei Key Laboratory of Compact Fusion, Langfang 065001, China
6. ENN Science and Technology Development Co., Ltd., Langfang 065001, China