1. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China
2. School of Nuclear Sciences and Technology University of Chinese Academy of Sciences Beijing 100049 China
3. Spallation Neutron Source Science Center Dongguan 523803 China
4. State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 China
5. School of Physics Sun Yat-Sen University Guangzhou 510275 China
6. School of Materials and New Energy South China Normal University Shanwei 516625 China
7. Institute of Plasma Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China
8. University of Science and Technology of China Hefei 230026 China