Chinese Optics Letters, 2011, 9 (7): 070401, Published Online: May. 18, 2011
Intensifying process of polarization ef fect within pixellated CdZnTe detectors for X-ray imaging Download: 652次
高通量X射线 空间电荷 极化效应 CdZnTe探测器 040.1880 Detection 160.6000 Semiconductor materials 230.0040 Detectors 340.7440 X-ray imaging
Abstract
The intensifying process of polarization effect at room temperature in a pixellated Cadmium zinc telluride (CdZnTe) monolithic detector is studied. The process is attributed to the increase in build up space charges in the CdZnTe crystal, which causes an expansion of the space charge region under the irradiated area. The simulations of electric potential distributions indicate that the distorted electric potential due to the high X-ray flux is significantly changed and even deteriorated due to increasing space charges within the irradiated volume. An agreement between the space charge distribution and electric potential is discussed.
Xi Wang, Shali Xiao, Miao Li, Liuqiang Zhang, Yulin Cao, Yuxiao Chen. Intensifying process of polarization ef fect within pixellated CdZnTe detectors for X-ray imaging[J]. Chinese Optics Letters, 2011, 9(7): 070401.