MPGD-based photon detector upgrade for COMPASS RICH

G. Hamar, S. Dalla Torre, F. Tessarotto, S. Levorato, S. S. Dasgupta, C. D.R. Azevedo

Research output: Article


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 a 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 front-end electronics based on APV25 chips. The paper focuses on the main issues of production, detailed quality assessment technique, and the commissioning status of the first in-experiment MPGD-based photon detectors for RICH application.

Original languageEnglish
Article numberC07026
JournalJournal of Instrumentation
Issue number7
Publication statusPublished - júl. 17 2017


ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Hamar, G., Torre, S. D., Tessarotto, F., Levorato, S., Dasgupta, S. S., & Azevedo, C. D. R. (2017). MPGD-based photon detector upgrade for COMPASS RICH. Journal of Instrumentation, 12(7), [C07026].