| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1827622 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 4 Pages |
Abstract
Hybrid photon detectors are one of the few low light level sensors that can provide an excellent single and multiple photoelectron amplitude resolution. The recently developed hybrid photon detectors for the Major Atmospheric Gamma-Imaging Cherenkov (MAGIC) telescope project with an 18-mm-diameter GaAsP photocathode (the Hamamatsu R9792U-40) have a peak quantum efficiency of more than 50% and a pulse width of â¼2.3ns. In addition, the afterpulsing rate of these tubes is â¼300 times lower compared to that of conventional photomultiplier tubes. Photocathode aging measurements showed lifetimes of more than 10 years under standard operating conditions of Cherenkov Telescopes. The temperature dependence of the avalanche gain can be reduced to the same level of a photomultiplier by a simple compensation circuit. Here we report on the recent progress with the above-mentioned hybrid photon detectors.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
T.Y. Saito, E. Bernardini, D. Bose, M.V. Fonseca, E. Lorenz, K. Mannheim, R. Mirzoyan, R. Orito, T. Schweizer, M. Shayduk, M. Teshima,