The AGILE silicon tracker: an innovative /γ-ray instrument for space

Details The AGILE silicon tracker: an innovative /γ-ray instrument for space The AGILE silicon tracker: an innovative /γ-ray instrument for space

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nimpa.501..280p&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 501, Issue 1, p. 280-287.

Physics

55

Scientific paper

AGILE (Light Imager for Gamma-ray Astrophysics) is the first small scientific mission of ASI, the Italian Space Agency. It is a light (100kg for the scientific instrument) satellite for the detection of /γ-ray sources in the energy range 30MeV-50GeV within a large field of view (1/4 of the sky). It is planned to be operational in the years 2003-2006, a period in which no other gamma-ray mission in the same energy range is foreseen.
AGILE is made of a silicon tungsten tracker, a CsI(Tl) minicalorimeter (1.5X0), an anticoincidence system of segmented plastic scintillators and a X-ray imaging detector sensitive in the 10-40keV range. The tracker consists of 14 planes, each of them made of two layers of 16 single-sided, AC coupled, 410μm thick, 9.5×9.5cm2 silicon detectors with a readout pitch of 242μm and a floating strip. The readout ASIC is the TAA1, an analog-digital, low noise, self-triggering ASIC used in a very low power configuration (<400μW/channel) with full analog readout. The trigger of the satellite is given by the tracker. The total number of readout channels is around 43000.
We present a detailed description of the tracker, its trigger and readout logic, its assembly procedures and the prototype performance in several testbeam periods at the CERN PS.

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