Hybrid contacts for CZT virtual Frisch-grid detectors

G. S. Camarda; A. E. Bolotnikov; W. Chan; Y. Cui; R. Gul; A. Hossain; K. Kim; G. Yang; R. B. James

doi:10.1117/12.896682

22 September 2011 Hybrid contacts for CZT virtual Frisch-grid detectors

G. S. Camarda, A. E. Bolotnikov, W. Chan, Y. Cui, R. Gul, A. Hossain, K. Kim, G. Yang, R. B. James

Proceedings Volume 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII; 814202 (2011) https://doi.org/10.1117/12.896682
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

In our previous design of virtual Frisch-grid CdZnTe (CZT) detectors, the charge drift-lines can be terminated at the side surfaces before the carriers reach the collecting anode; this results in a loss of signal from the interacting events near the detector's edges. Here, we describe our new design for the anode contact that reduces these edge effects by focusing the electric field towards the detectors' central axes. Four detectors were fabricated with the new hybrid anode contact, and their performances were evaluated and compared to those from the previous design for our virtual Frisch-grid detectors. The results obtained for all four showed similar improvement: therefore, we illustrate them with the findings from one detector.

Citation Download Citation

G. S. Camarda, A. E. Bolotnikov, W. Chan, Y. Cui, R. Gul, A. Hossain, K. Kim, G. Yang, and R. B. James "Hybrid contacts for CZT virtual Frisch-grid detectors", Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 814202 (22 September 2011); https://doi.org/10.1117/12.896682

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