Instrument description and performance of the Imaging Gamma-Ray Telescope COMPTEL aboard the Compton Gamma-Ray Observatory

摘要: The imaging Compton telescope COMPTEL is one of the four instruments on board Gamma-Ray Observatory (GRO), which was launched 1991 April 5 by space shuttle Atlantis into an Earth orbit 450 km altitude. exploring 1-30 MeV energy range with angular resolution (1σ) between 1° and 2° within a large field view about 1 steradian. Its (8.8% FWHM at 1.27 MeV) makes it powerful gamma-ray line spectrometer. effective area (for on-axis incidence) varies 10 50 cm 2 depending event selections. Within 14 day observation period able to detect sources are 20 times weaker than Crab. measurement principle also allows measurements solar neutrons