Study of solid state photomultiplier

Physics – Optics

Scientific paper

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Infrared Astronomy, Photomultiplier Tubes, Photons, Quantum Efficiency, Radiation Detectors, Solid State, Spaceborne Telescopes, Coolants, Data Bases, Data Processing, Fiber Optics, Helium, Mathematical Models

Scientific paper

Available solid state photomultiplier (SSPM) detectors were tested under low-background, low temperature conditions to determine the conditions producing optimal sensitivity in a space-based astronomy system such as a liquid cooled helium telescope in orbit. Detector temperatures varied between 6 and 9 K, with background flux ranging from 10 to the 13th power to less than 10 to the 6th power photons/square cm-s. Measured parameters included quantum efficiency, noise, dark current, and spectral response. Experimental data were reduced, analyzed, and combined with existing data to build the SSPM data base included herein. The results were compared to analytical models of SSPM performance where appropriate models existed. Analytical models presented here were developed to be as consistent with the data base as practicable. Significant differences between the theory and data are described. Some models were developed or updated as a result of this study.

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