Array of virtual Frisch-grid CZT detectors with common cathode readout and pulse-height correction

A. E. Bolotnikov; G. S. Camarda; Y. Cui; S. U. Egarievwe; P. M. Fochuk; M. Fuerstnau; R. Gul; A. Hossain; F. Jones; K. Kim; O. V. Kopach; R. Taggart; G. Yang; Z. Ye; L. Xu; R. B. James

doi:10.1117/12.861775

27 August 2010 Array of virtual Frisch-grid CZT detectors with common cathode readout and pulse-height correction

A. E. Bolotnikov, G. S. Camarda, Y. Cui, S. U. Egarievwe, P. M. Fochuk, M. Fuerstnau, R. Gul, A. Hossain, F. Jones, K. Kim, O. V. Kopach, R. Taggart, G. Yang, Z. Ye, L. Xu, R. B. James

Author Affiliations +

Proceedings Volume 7805, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII; 780504 (2010) https://doi.org/10.1117/12.861775
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

We present our new results from testing 15-mm-long virtual Frisch-grid CdZnTe detectors with a common-cathode readout for correcting pulse-height distortions. The array employs parallelepiped-shaped CdZnTe (CZT) detectors of a large geometrical aspect ratio, with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode on the crystal's sides to create the virtual Frisch-grid effect. We optimized the geometry of the device and improved its spectral response. We found that reducing to 5 mm the length of the shielding electrode placed next to the anode had no adverse effects on the device's performance. At the same time, this allowed corrections for electron loss by reading the cathode signals to obtain depth information.

Citation Download Citation

A. E. Bolotnikov, G. S. Camarda, Y. Cui, S. U. Egarievwe, P. M. Fochuk, M. Fuerstnau, R. Gul, A. Hossain, F. Jones, K. Kim, O. V. Kopach, R. Taggart, G. Yang, Z. Ye, L. Xu, and R. B. James "Array of virtual Frisch-grid CZT detectors with common cathode readout and pulse-height correction", Proc. SPIE 7805, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XII, 780504 (27 August 2010); https://doi.org/10.1117/12.861775

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