Results from Aerogel Cerenkov Counters
To fix the design parameters for the Aerogel Cerenkov counters for the TASSO detector several test modules were investigated. They all were equipped with aerogel with a refractive index around 1.025. Direct unscattered light contributes with about 7 photoelectrons when collected by a mirror. In detectors with diffuse reflecting walls 3–18 photoelectrons were measured depending on the size of the system. With the 32 cells of the TASSO Cerenkov detector an efficiency of 4.1 ± 0.3 photoelectrons for relativistic cosmic particles were found.
KeywordsSilica Aerogel Threshold Curve Light Collection Cerenkov Radiator Cosmic Muon
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