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Proceedings Paper

Development status of a CZT spectrometer prototype with 3D spatial resolution for hard x-ray astronomy
Author(s): N. Auricchio; E. Caroli; A. Basili; G. Benassi; C. Budtz Jørgensen; R. M. Curado da Silva; S. Del Sordo; I. Kuvvetli; L. Milano; F. Moscatelli; J. B. Stephen; M. Zanichelli; A. Zappettini
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Paper Abstract

The development of new focusing optics based on wide band Laue lenses operating from ~60 keV up to several hundred keV is particularly challenging. This type of hard X-ray or gamma ray optics requires a high performance focal plane detector in order to exploit to the best their intrinsic capabilities. We describe a three dimensional (3D) position sensitive detector prototype suitable as the basic module for a high efficiency Laue lens focal plane detector. This detector configuration is currently under study for use in a balloon payload dedicated to performing a high significance measurement of the polarization status of the Crab between 100 and 500 keV. The prototype is made by packing 8 linear modules, each composed of one basic sensitive unit bonded onto a thin supporting ceramic layer. Each unit is a drift strip detector based on a CZT crystal, irradiated transversally to the electric field direction. The anode is segmented into 8 detection cells, each comprising one collecting strip and 8 surrounding drift strips. The drift strips are biased by a voltage divider. The cathode is divided into 4 horizontal strips for the reconstruction of the Z interaction position. The detector readout electronics is based on RENA-3 ASIC and the data handling system uses a custom electronics based on FPGA to provide the ASIC setting, the event handling logic, and the data acquisition. This paper mainly describes the components and the status of the undergoing activities for the construction of the proposed 3D CZT prototype and shows the results of the electronics tests.

Paper Details

Date Published: 25 September 2012
PDF: 9 pages
Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 84530S (25 September 2012); doi: 10.1117/12.928327
Show Author Affiliations
N. Auricchio, INAF - IASF Bologna (Italy)
E. Caroli, INAF - IASF Bologna (Italy)
A. Basili, INAF - IASF Bologna (Italy)
G. Benassi, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
C. Budtz Jørgensen, National Space Institute, Technical Univ. of Denmark (Denmark)
R. M. Curado da Silva, Lab. de Instrumentação e Física Experimental de Particulas (Portugal)
S. Del Sordo, INAF - IASF Palermo (Italy)
I. Kuvvetli, National Space Institute, Technical Univ. of Denmark (Denmark)
L. Milano, Univ. degli Studi di Ferrara (Italy)
F. Moscatelli, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
J. B. Stephen, INAF - IASF Bologna (Italy)
M. Zanichelli, Istituto per la Microelettronica e Microsistemi, CNR (Italy)
A. Zappettini, Istituto per la Microelettronica e Microsistemi, CNR (Italy)


Published in SPIE Proceedings Vol. 8453:
High Energy, Optical, and Infrared Detectors for Astronomy V
Andrew D. Holland; James W. Beletic, Editor(s)

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