Speaker
Dr
Gergo Hamar
(INFN Trieste)
Description
The RICH detector of the COMPASS Experiment at CERN SPS is undergoing an
important upgrade: the central MWPC-based photon detectors have been replaced with novel Micropattern
detectors, to cope with the challenging efficiency and stability requirements of the new COMPASS
measurements.
The new hybrid MPGD detector consists of two layers of ThickGEMs and
capacitive bulk Micromegas. Photoconversion takes place on the CsI layer deposited onto the first
ThickGEM; while position information and signals are read out from the pad-segmented anode via capacitive
coupling by analog FEE based on APV25 chips.
The presentation focuses on the main issues of production, detailed quality
assessment technique, and the commissioning status of the first in-experiment MPGD-based RICH.
The talk will be given on behalf of a the COMPASS RICH Group.
Primary author
Dr
Gergo Hamar
(INFN Trieste)
