Simulated Performance of an Advanced Compton Telescope

Details Simulated Performance of an Advanced Compton Telescope Simulated Performance of an Advanced Compton Telescope

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apru11007k&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Compton gamma-ray telescopes should provide the order-of-magnitude improvement in sensitivity that will be needed to systematically study numerous supernovae and many other astrophysical gamma ray sources. The advent of highly-segmented gamma ray detectors with good energy resolution and three-dimensional position resolution has made a new class of high-efficiency Compton gamma ray detectors possible. These instruments record the positions and energies of each individual gamma-ray interaction with high precision. Analysis of the individual interactions can provide energy and directional information, even for events with only partial energy deposition. Advantages over traditional gamma-ray telescopes in the MeV region include enhanced efficiency, improved background rejection, gamma ray imaging, sensitivity to polarization. We report on efficiency and sensitivity calculations based on a simple Monte-Carlo analysis. Key factors in the efficiency include the probability an event will have the requisite number of interactions, the efficiency of reconstructing the event order, losses in passive materials, and detector material, energy and position resolution. Rejection of external background will also be discussed. The capabilities for new supernovae science will also be discussed, including the ability to study light-curves and classes of models by observing on the order of 100 supernovae per year.

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