NDLI: Characterization of a CdTe microstrip detector as a hard X ray focal plane prototype

Content Provider	IEEE Xplore Digital Library
Author	Caroli E. Auricchio, N. Donati, A. Schiavone, F. Stephen, J.B. Ventura, G. Del Sordo, S. Agnetta, G. Russo, F. Zora, M. Bertuccio, G. Caccia, S. Sampietro, M. Gombia, E. Pareschi, G. Negri, B.
Copyright Year	2004
Description	Author affiliation: IASF/CNR, Bologna (Caroli E)
Abstract	Our collaboration is developing a hard X-ray telescope operating in the 10-100 keV energy range and based on focusing multi-layers coupled to a CdTe/CZT focal plane detector. Two classes of detectors can comply with the focal plane requirements: pixel detectors, where an electrode is segmented as a bi-dimensional array and micro-strip detectors. In the last ones each of the opposite crystal surfaces contains a set of orthogonal micro-strips. This geometry reduces noticeably the number of readout independent channels even if it requires the coincidence among at least two opposite strips to determine the position. In the current work we present the characterization of the spectroscopic and spatial response of CdTe prototype (1 $cm^{2})$ equipped with two orthogonal micro-strip electrodes with 0.5 mm pitch and mounted on an alumina substrate using both collimated and un-collimated radioactive sources. The 16 anode strips use, as front-end analogical electronics, an innovative low noise and low power dissipation (<1 mW/ch) ASIC, whereas the cathode strips pulses are readout by 16 charge sensitive preamplifiers. The handling and acquisition electronics implements a gamma camera logic, where the equivalent of 256 channels are acquired and converted via 4 ADC and afterwards sent to a 32 bit parallel interface. This system calculates a weighted average of the signals from the irradiated strips to determine the mean position and the energy of the interaction. The comparison between these results and those obtained with an equivalent pixel detector should allow to decide the definitive design of the hard X ray focal plane detector
Starting Page	4378
Ending Page	4382
File Size	2217026
Page Count	5
File Format	PDF
ISBN	0780387007
ISSN	10823654
e-ISBN	0780387015
DOI	10.1109/NSSMIC.2004.1466856
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-16
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microstrip Prototypes Strips Electrodes Collaboration Telescopes X-ray detection X-ray detectors Sensor arrays Geometry
Content Type	Text
Resource Type	Article

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