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arXiv · 1412.6880

An aerogel Cherenkov detector for multi-GeV photon detection with low sensitivity to neutrons

Y. Maeda·N. Kawasaki·T. Masuda·H. Morii·D. Naito·Y. Nakajima·H. Nanjo·T. Nomura·N. Sasao·S. Seki·K. Shiomi·T. Sumida·Y. Tajima
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Abstract

We describe a novel photon detector which operates under an intense flux of neutrons. It is composed of lead-aerogel sandwich counter modules. Its salient features are high photon detection efficiency and blindness to neutrons. As a result of Monte Carlo (MC) simulations, the efficiency for photons with the energy larger than 1 GeV is expected to be higher than 99.5% and that for 2 GeV/$c$ neutrons less than 1%. The performance on the photon detection under such a large flux of neutrons was measured for a part of the detector. It was confirmed that the efficiency to photons with the energy $>$1 GeV was consistent with the MC expectation within 8.2% uncertainty.

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Y. Maeda, N. Kawasaki, T. Masuda, H. Morii, D. Naito, Y. Nakajima, H. Nanjo, T. Nomura, N. Sasao, S. Seki, K. Shiomi, T. Sumida, Y. Tajima. 2014-12-22. An aerogel Cherenkov detector for multi-GeV photon detection with low sensitivity to neutrons. https://doi.org/10.1093/ptep%2Fptv074

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