Novel photon detectors based on ThickGEM technology for COMPASS RICH-1

by Silvia Dalla Torre (Istituto Nazionale di Fisica Nucleare (INFN))

Friday 15 Jul 2011, 11:00 → 12:00 Europe/Zurich

13/2-005 (CERN)

MWPCs coupled to CsI photocathodes have represented a success, being the first gaseous photon detectors equipped with solid state photocathodes. Nevertheless, they suffer from some limitation related to ageing and low gain operation. The novel photon detectors, making use of a closed geometry, are designed to overcome these limitations. The ultimate goal is to obtain large size detectors adequate for Cherenkov imaging application. A complete R&D programme dedicated to the development of a novel gaseous photon detector has been performed. The basic architecture of a THGEM-based photon detector consists in a configuration with multiple THGEM layers forming a multiplication structure, where the first layer is coated with a CsI film and acts as a reflective photo-cathode. The engineering phase of these counters is ongoing. The status and perspectives of the project is presented.

Slides CERN_THGEM_dallatorre.pdf CERN_THGEM_dallatorre.pptx