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Development of Silica Aerogel Cerenkov Detectors

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3 Author(s)
Carlson, P.J. ; University of Stockholm, Institute of Physics Vanadisvÿgen 9, S-113 46 Stockholm, Sweden ; Johansson, K.E. ; Norrby, J.

Recently silica aerogel has been employed as a Cerenkov radiator. This solid material can be produced with a refractive index of 1.01-1.10, thus complementing the refractive indices easily obtained with gases and liquids. It is very well suited for identification of particles having momenta of about one or a few GeV/c. Examples of efficient detectors with active surfaces of about 0.1 m2 using light collection system constructed from mirrors and diffusing walls are given. With a refractive index of 1.03 and an aerogel thickness of 9 cm, signals of about 6 photoelectrons have been obtained for ß = 1 particles.

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Nuclear Science, IEEE Transactions on  (Volume:27 ,  Issue: 1 )