Physics
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5198..225h&link_type=abstract
Hard X-Ray and Gamma-Ray Detector Physics V. Edited by Franks, Larry A.; Burger, Arnold; James, Ralph B.; Hink, Paul L. Proc
Physics
Scientific paper
The Burst Alert Telescope (BAT) aboard the Swift Gamma-ray Burst Explorer (scheduled for launch in January 2004) is a coded aperture telescope that includes an array of 32,768 CZT planar detectors, each 4 mm x 4 mm x 2 mm thick. The mobility-lifetime products for holes and electrons are used to characterize the charge transport properties of each detector and were measured during pre-flight calibration tests in early 2003. These values were found to vary over an order of magnitude from detector to detector. In addition to the charge transport models, other more empirical models are used to characterize the remaining components of the response of the BAT array to 15 - 150 keV gamma radiation from any direction in BAT's field-of-view (FOV). The full angular and spectral response of the array as a whole can be parameterized and the spectral response of the instrument over the range of angles and energies can thus be generated in an overall instrument response model. Here we present a preliminary instrument response model and discuss the general characteristics of the detector array. The software to generate the response matrix for BAT is currently under development.
Hullinger Derek D.
Parsons Ann Marie
Sato Goro
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