AGILE silicon tracker: an advanced gamma- and x-ray detector for space

Giulio Fedel; Guido Barbiellini; F. Liello; Francesco Longo; C. Pontoni; Michela Prest; Erik Vallazza

doi:10.1117/12.409121

13 December 2000 AGILE silicon tracker: an advanced gamma- and x-ray detector for space

Giulio Fedel, Guido Barbiellini, F. Liello, Francesco Longo, C. Pontoni, Michela Prest, Erik Vallazza

Proceedings Volume 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI; (2000) https://doi.org/10.1117/12.409121
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

AGILE is a light and effective instrument for the detection of gamma-ray sources in the energy range 30 MeV - 50 GeV within a large field of view. The instrument is planned to fly in the years 2002 - 2005, a period in which no other gamma-ray mission in the same energy range is foreseen. AGILE is made of a tungsten-silicon tracker, a CsI minicalorimeter, an anticoincidence system and an X-ray detector (10 - 40 keV). The tracker consists of 14 planes, each made of 2 layers of 16 single-sided, AC coupled, 410 micrometer thick silicon detectors. Each detector covers an area of 9.5 X 9.5 cm² and has a readout pitch of 242 micrometer with one floating strip. Four silicon detectors are bonded together creating a 'ladder' 38 cm long. The total number of readout channels is around 37000. The readout chip is the TAA1 (IDE- AS, Norway), an analog-digital, self triggering chip used in a very low power configuration (400 (mu) W/channel). A prototype silicon ladder and the complete readout chain have been tested at the CERN PS in July 1999. The final ladder has been tested in May 2000. We present the noise performances of the readout electronics in the very low power configuration, and the testbeam results obtained with the full AGILE ladder. The results are compared with GEANT simulations.

Citation Download Citation

Giulio Fedel, Guido Barbiellini, F. Liello, Francesco Longo, C. Pontoni, Michela Prest, and Erik Vallazza "AGILE silicon tracker: an advanced gamma- and x-ray detector for space", Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); https://doi.org/10.1117/12.409121

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