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.
@article{arxiv.1412.6880,
title = {An aerogel Cherenkov detector for multi-GeV photon detection with low sensitivity to neutrons},
author = {Y. Maeda and N. Kawasaki and T. Masuda and H. Morii and D. Naito and Y. Nakajima and H. Nanjo and T. Nomura and N. Sasao and S. Seki and K. Shiomi and T. Sumida and Y. Tajima},
journal= {arXiv preprint arXiv:1412.6880},
year = {2016}
}
Comments
16 pages, 16 figures, submitted to Prog. Theor. Exp. Phys