Investigation of Hamamatsu H8500 phototubes as single photon detectors.

Authors :: Montgomery, R.A.
Hoek, M.
Lucherini, V.
Mirazita, M.
Orlandi, A.
Anefalos Pereira, S.
Pisano, S.
Rossi, P.
Viticchiè, A.
Witchger, A.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Aug2015, Vol. 790, p28-41. 14p.
Publication Year :: 2015
Abstract: We have investigated the response of a significant sample of Hamamatsu H8500 MultiAnode PhotoMultiplier Tubes (MAPMTs) as single photon detectors, in view of their use in a ring imaging Cherenkov counter for the CLAS12 spectrometer at the Thomas Jefferson National Accelerator Facility. For this, a laser working at 407.2 nm wavelength was employed. The sample is divided equally into standard window type, with a spectral response in the visible light region, and UV-enhanced window type MAPMTs. The studies confirm the suitability of these MAPMTs for single photon detection in such a Cherenkov imaging application. [ABSTRACT FROM AUTHOR]