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

作者：Maeda Y^*; Kawasaki N; Masuda T; Morii H; Naito D; Nakajima Y; Nanjo H; Nomura T; Sasao N; Seki S; Shiomi K; Sumida T; Tajima Y

来源：Progress of Theoretical and Experimental Physics, 2015, 2015(6): 063H01.

DOI：10.1093/ptep/ptv074

We describe a novel multi-GeV 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. Monte Carlo (MC) simulations show that the efficiency for photons with energy larger than 1 GeV is expected to be higher than 99.5% and that for 2 GeV/c neutrons is less than 1%. Performance of photon detection with an underlying large flux of neutrons was measured by a partial detector with 12 modules. We confirm the efficiency for photons with energy > 1 GeV is consistent with the MC expectation within an uncertainty of 8.2%.

• 出版日期2015-6