Speaker
Description
The RICH-1 Detector of the COMPASS Experiment at CERN SPS is undergoing an important
upgrade for the physics run 2016 starting in April 2016: four new Photon Detectors, based on MPGD technology and
covering a total active area larger than 1.2 square meters will replace the actual MWPC-based
photon detectors in order to cope with the challenging efficiency and stability requirements
of the new COMPASS measurements. The new detector architecture consists in a hybrid
MPGD combination: two layers of THGEMs, the first of which also acts as a reflective
photocathode (a CsI layer is deposited on its top face) are coupled to a bulk Micromegas
on a pad segmented anode; the signals are read-out via capacitive coupling by
analog F-E based on the APV25 chip. The related R&D is shortly recalled.
All aspects of the COMPASS RICH-1 Photon Detectors upgrade are presented
and large emphasis is dedicated to the engineering aspects, the mass production
and the quality assessment of the MPGD componets.
In particular, the design and production of the detector components, the
assembling and the validation tests of THGEMs and Micromegas and the engineering
challenges of the detector installation are presented together with the
expected performance of the upgraded COMPASS RICH-1. Preliminary performance figures are provided.
Talk on behalf of a the COMPASS RICH group.
| Registered | Yes |
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