Speaker
Dr
Fulvio Tessarotto
(INFN, Sezione di Trieste - Universita & INFN, Trieste)
Description
For the future upgrade of COMPASS RICH-1 an R&D project was started to develop a gaseous detector of single UV photons, able to stably operate at high gain and high rate, and to provide good time resolution and insensitivity to magnetic field.
The detector is based on the use of THGEMs, arranged in a multilayer architecture, where the first layer is coated with a CsI film and acts as a reflective photocathode.
The response of single layer THGEMs with various geometries and different conditions has been extensively studied.
Photon detector prototypes were built, tested in laboratory and operated during test beam runs at CERN.
Efficient detection of Cherenkov photons has been obtained, with stable operation in the test beam environment; the typical gain is about 100,000 and the time resolution is better than 10 ns.
The motivations for the COMPASS RICH-1 upgrade will be presented and the status of the R&D program will be discussed together with the challenges related to the construction of large area THGEM-based photon detectors to be used on RICH counters.
Author
Dr
Fulvio Tessarotto
(INFN, Sezione di Trieste - Universita & INFN, Trieste)
