Development of a modular CdTe detector plane for gamma-ray burst detection below 100 keV

Details Development of a modular CdTe detector plane for gamma-ray burst detection below 100 keV Development of a modular CdTe detector plane for gamma-ray burst detection below 100 keV

2007-01-15

arxiv.org/abs/astro-ph/0701423v1

Adv.SpaceRes.40:1259-1262,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures in color, Advances in Space Research, COSPAR meeting, Beijing (2006)

Scientific paper

10.1016/j.asr.2007.02.035

We report on the development of an innovative CdTe detector plane (DPIX) optimized for the detection and localization of gamma-ray bursts in the X-ray band (below 100 keV). DPIX is part of an R&D program funded by the French Space Agency (CNES). DPIX builds upon the heritage of the ISGRI instrument, currently operating with great success on the ESA INTEGRAL mission. DPIX is an assembly of 200 elementary modules (XRDPIX) equipped with 32 CdTe Schottky detectors (4x4 mm2, 1 mm thickness) produced by ACRORAD Co. LTD. in Japan. These detectors offer good energy response up to 100 keV. Each XRDPIX is readout by the very low noise front-end electronics chip IDeF-X, currently under development at CEA/DSM/DAPNIA. In this paper, we describe the design of XRDPIX, the main features of the IDeF-X chip, and will present preliminary results of the reading out of one CdTe Schottky detector by the IDeF-X V1.0 chip. A low-energy threshold around 2.7 keV has been measured. This is to be compared with the 12-15 keV threshold of the ISGRI-INTEGRAL and BAT-SWIFT instruments, which both use similar detector material.

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