1. The VSiPMT: A new Generation of Photons Detectors
Presented by Riccardo de Asmundis On behalf of Napoli’s VSiPMT group.
The prototype
Under our requests and a series of negotiations for the specifications, HAMAMATSU built us a couple of prototypes.
AIM
Si-PMs present several excellent characteristics, like low bias voltage, high gain, photon counting capabilities, insensitivity to magnetic field, etc.
Nevertheless they have a limited sensitive surface.
 Need to increase the sensitive surface
23/05/2015
Riccardo de Asmundis, INFN Napoli

2. Results of tests on the prototypes
Photon Counting Caability
Photocathode
Surface increase
factor ≈ 7
MEASUREMENT CONDITIONS:
VSiPMT illuminated by a pulsed laser light at low intensity (407nm)
Oscilloscope triggered in synch with the laser
Responses for multiple triggers are overlaid
23/05/2015
Riccardo de Asmundis, INFN Napoli