Characterization of large area APDs for the EXO-200 detector
R. Neilson, F. LePort, A. Pocar, K. Kumar, A. Odian, C. Y. Prescott, V. Tenev, N. Ackerman, D. Akimov, M. Auger, C. Benitez-Medina, M. Breidenbach, A.
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Abstract
EXO-200 uses 468 large area avalanche photodiodes (LAAPDs) for detection of scintillation light in an ultra-low-background liquid xenon (LXe) detector. We describe initial measurements of dark noise, gain and response to xenon scintillation light of LAAPDs at temperatures from room temperature to 169K - the temperature of liquid xenon. We also describe the individual characterization of more than 800 LAAPDs for selective installation in the EXO-200 detector.
