Gamma large area silicon telescope: Applying SI strip detector technology to the detection of gamma rays in space

Details Gamma large area silicon telescope: Applying SI strip detector technology to the detection of gamma rays in space Gamma large area silicon telescope: Applying SI strip detector technology to the detection of gamma rays in space

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.356..227a&link_type=abstract

In ESA, Proceedings of an ESA Symposium on Photon Detectors for Space Instrumentation p 227-232 (SEE N94-15025 03-19)

Computer Science

Gamma Ray Telescopes, Silicon, Silicon Radiation Detectors, Spaceborne Telescopes, Design Analysis, Gamma Ray Observatory, Photons, Technology Utilization

Scientific paper

The recent discoveries and excitement generated by EGRET (Energetic Gamma Ray Experiment Telescope) (presently operating on CGRO (Compton Gamma Ray Observatory)) has prompted an investigation into modern technologies ultimately leading to the next generation space based gamma ray telescope. The goal is to design a detector that would increase the data acquisition rate by almost two orders of magnitude beyond EGRET, while at the same time improving on the angular resolution, the energy measurement of reconstructed gamma rays and the triggering capability of the instrument. The proposed GLAST (Gamma Ray Large Area Silicon Telescope) instrument is based on silicon particle detectors that offer the advantages of no consumables, no gas volume, robust (versus fragile), long lived, and self triggering. The GLAST detector is roughly modeled after EGRET in that a tracking module precedes a calorimeter. The GLAST tracker has planes of cross strip (x, y) 300 micrometer match silicon detectors coupled to a thin radiator to measure the coordinates of converted electron-positron pairs. An angular resolution of 0.1 deg at high energy is possible (the low energy angular resolution 100 MeV would be about 2 deg, limited by multiple scattering). The increased depth of the GLAST calorimeter over EGRET's extends the energy range to about 300 GeV.

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