[Shen, C.;Wang, Y.;Han, D.;Zou, Z.;Li, Y.] Tsinghua Univ, Dept Engn Phys, Key Lab Particle & Radiat Imaging, Beijing 100084, Peoples R China.^[Shen, C.;Xiao, D.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.^[Zheng, X.] Univ Virginia, 382 McCormick Rd, Charlottesville, VA 22904 USA.^[Chen, J.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.