Physics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4141..243b&link_type=abstract
Proc. SPIE Vol. 4141, p. 243-252, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics II, Ralph B. James; Richard C. Schirato; E
Physics
Scientific paper
We are developing CdZnTe pixel detectors for use as focal plane sensors in astronomical hard X-ray telescopes. To optimize the spectral response and imaging performance, we are investigating the effect of contact geometry on charge collection. Specifically, we have studied contact designs with orthogonal thin strips placed between pixel contacts. We apply a negative bias on the grid with respect to the pixel potential to force charge to drift toward the contacts. The grid bias is selected to be just sufficient to avoid charge collection on the grid, while increasing the transverse electric field on the surface between contacts. In contrast to focusing electrodes designed to force field lines to terminate on the pixel contact, our approach allows us to overcome the effects of charge loss between the pixels without significant increase of the leakage current, improving the overall energy resolution of the detector. In this paper we describe the performance of a CdZnTe pixel detector containing a grid electrode, bonded to a custom low-noise VLSI readout. We discuss the advantages of this type of detector for high spectral resolution applications.
Boggs Steven E.
Bolotnikov Aleksey E.
Cook Walter R.
Harrison Fiona A.
Hubert Chen C. M.
No associations
LandOfFree
Optimal contact geometry for CdZnTe pixel detectors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optimal contact geometry for CdZnTe pixel detectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal contact geometry for CdZnTe pixel detectors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1116469