Recent development on the realization of a 1-inch VSiPMT prototype

F.C.T Barbato,G Barbarino,F Di Capua,C.M Mollo,A Valentini,D Vivolo,L Campajola,A Morselli,A Capone,G Rodriguez Fernandez

doi:10.1051/epjconf/201713602016

Abstract

The VSiPMT (Vacuum Silicon PhotoMultiplier Tube) is an innovative design for a revolutionary hybrid photodetector. The idea, born with the purpose to use a SiPM for large detection volumes, consists in replacing the classical dynode chain with a SiPM. In this configuration, we match the large sensitive area of a photocathode with the performances of the SiPM technology, which therefore acts like an electron detector and so like a current amplifier. The excellent photon counting capability, fast response, low power consumption and great stability are among the most attractive features of the VSiPMT. In order to realize such a device we first studied the feasibility of this detector both from theoretical and experimental point of view, by implementing a Geant4-based simulation and studying the response of a special non-windowed MPPC by Hamamatsu with an electron beam. Thanks to this result Hamamatsu realized two VSiPMT industrial prototypes with a photocathode of 3mm diameter. We present the progress on the realization of a 1-inch prototype and the preliminary tests we are performing on it.

Highlights

IntroductionWe propose an innovative photodetector for the astroparticle physics experiments: the VSiPMT
We present the progress on the realization of a 1-inch prototype and the preliminary tests we are performing on it
We propose an innovative photodetector for the astroparticle physics experiments: the VSiPMT

Summary

Introduction

We propose an innovative photodetector for the astroparticle physics experiments: the VSiPMT In this scenario the Vacuum Silicon PhotoMultiplier Tube represents an appealing solution to use SiPMs from large detection area or volumes, a current big challenge. This new device is based on the combination of a SiPM with a PMT standard envelope, see fig. Using a SiEM allows to reach a very high gain totally provided by the pixels working in geiger mode. From a classical HPD, in this case the high gain is totally realized by the SiEM pixels operating in geiger mode.

Realization of a 1-inch prototype

The focusing

The photocathode

The SiEM

The preliminary results

Conclusions