Affiliation: | 1. Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China;2. Department of Electrical Engineering, University of California Los Angeles, Los Angeles, CA 90095, USA;3. Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095, USA;4. Instituto Superior Técnico, Lisbon, Portugal;5. ISCTE - Instituto Universitário de Lisboa, 1649–026, Lisbon, Portugal |