Mathematics – Logic
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..aprs10007c&link_type=abstract
American Physical Society, April Meeting, 2004, May 1-4, 2004, Denver, Colorado April 2004, MEETING ID: APR04, abstract #S10.007
Mathematics
Logic
Scientific paper
GLAST Large Area Telescope (LAT) is the next generation space based gamma ray telescope in the photon energy range 30 MeV 300 GeV. The GLAST mission is to be launched by NASA in 2007. For photon energy measurements it will use a CsI crystal calorimeter (CAL) made of 16 identical modules. The CAL Engineering Module (EM) is the first full scale prototype built with the same technology as flight modules to verify the design and technological choices before starting calorimeter production. The module contains 96 CsI crystal bars, supported by a carbon fiber composite structure and read out with silicon PIN photodiodes from both ends. The longitudinal position measurement is provided by the light asymmetry from the two ends of each crystal; the energy deposition is derived from the sum of the ends. In this paper we report the results of functional and environmental testing of the EM and calibrations using cosmic muons and heavy ion beams that probed the performance over the full energy domain. The EM met all requirements.
Bogaert Gilles
Chekhtman A.
Grove Eric J.
Johnson Neil W.
Lott Benoit
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