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Proceedings Paper • Open Access

Caliste 64: detection unit of a spectro imager array for a hard x-ray space telescope
Author(s): O. Limousin; A. Meuris; F. Lugiez; Olivier Gevin; F. Pinsard; C. Blondel; I. Le Mer; E. Delagnes; M.C. Vassal; F. Soufflet; R. Bocage; A. Penquer; M. Billot

Paper Abstract

In the frame of the hard X-ray Simbol-X observatory, a joint CNES-ASI space mission to be flown in 2014, a prototype of miniature Cd(Zn)Te camera equipped with 64 pixels has been designed. The device, called Caliste 64, is a spectro-imager with high resolution event timetagging capability. Caliste 64 integrates a Cd(Zn)Te semiconductor detector with segmented electrode and its front-end electronics made of 64 independent analog readout channels. This 1 × 1 × 2 cm3 camera, able to detect photons in the range from 2 keV up to 250 keV, is an elementary detection unit juxtaposable on its four sides. Consequently, large detector array can be made assembling a mosaic of Caliste 64 units. Electronics readout module is achieved by stacking four IDeF-X V1.1 ASICs, perpendicular to the detection plane. We achieved good noise performances, with a mean Equivalent Noise Charge of ~65 electrons rms over the 64 channels. For the first prototypes, we chose Pt//CdTe//Al/Ti/Au Schottky detectors because of their very low dark current and excellent spectroscopic performances. Recently a Caliste 64 prototype has been also equipped with a 2 mm thick Au//CdZnTe//Au detector. This paper presents the performances of these four prototypes and demonstrates spectral performances better than 1 keV fwhm at 59.54 keV when the samples are moderately cooled down to -10°C.

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105660Z (21 November 2017); doi: 10.1117/12.2308232
Show Author Affiliations
O. Limousin, CEA-IRFU (France)
A. Meuris, CEA-IRFU (France)
F. Lugiez, CEA-IRFU (France)
Olivier Gevin, CEA-IRFU (France)
F. Pinsard, CEA-IRFU (France)
C. Blondel, CEA-IRFU (France)
I. Le Mer, CEA-IRFU (France)
E. Delagnes, CEA-IRFU (France)
M.C. Vassal, 3D-Plus (France)
F. Soufflet, 3D-Plus (France)
R. Bocage, 3D-Plus (France)
A. Penquer, Ctr. National d'Études Spatiales (France)
M. Billot, Ctr. National d'Études Spatiales (France)


Published in SPIE Proceedings Vol. 10566:
International Conference on Space Optics — ICSO 2008
Josiane Costeraste; Errico Armandillo; Nikos Karafolas, Editor(s)

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