/ Instrumentation

The MPGD-based photon detectors for the upgrade of COMPASS RICH-1

Alexeev, M. (Turin U.) ; Azevedo, C.D.R. (Aveiro U.) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (Trieste U.) ; Bressan, A. (Trieste U.) ; Büchele, M. (Freiburg U.) ; Chiosso, M. (Turin U.) ; Ciliberti, P. (Trieste U.) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S. (INFN, Trieste) ; Denisov, O. (INFN, Turin) ; Finger, M. (Dubna, JINR) ; Fischer, H. (Freiburg U.) ; Gobbo, B. (INFN, Trieste) ; Gregori, M. (INFN, Trieste) ; Hamar, G. (INFN, Trieste) ; Herrmann, F. (Freiburg U.) ; Levorato, S. (Trieste U.) ; Maggiora, A. (INFN, Turin) ; Makke, A. (Trieste U.) ; Martin, A. (Trieste U.) ; Menon, G. (INFN, Trieste) ; Steiger, K. (Liberec Tech. U.) ; Novy, J. (Dubna, JINR) ; Panzieri, D. (Piemonte Orientale U., Alessandria) ; Pereira, F.A.B. (Aveiro U.) ; Santos, C.A. (Aveiro U.) ; Sbrizzai, G. (Trieste U.) ; Schopferer, S. (Freiburg U.) ; Slunecka, M. (Dubna, JINR) ; Steiger, L. (Liberec Tech. U.) ; Sulc, M. (Liberec Tech. U.) ; Tessarotto, F. (INFN, Trieste) ; Veloso, J.F.C.A. (Aveiro U.)

Published in: Nucl.Instrum.Meth.
Year: 2017
Vol.: A876
Page No: 96-100
Pages: 5
Year: 2017-12-21 published

Abstract: The RICH-1 Detector of the COMPASS experiment at CERN SPS has undergone an important upgrade for the 2016 physics run. Four new photon detectors, based on Micro Pattern Gaseous Detector technology and covering a total active area larger than 1.2 m 2 have replaced the previously used MWPC-based photon detectors. The upgrade answers the challenging efficiency and stability quest for the new phase of the COMPASS spectrometer physics programme. The new detector architecture consists in a hybrid MPGD combination of two Thick Gas Electron Multipliers and a MicroMegas stage. Signals, extracted from the anode pad by capacitive coupling, are read-out by analog F-E based on the APV25 chip. The main aspects of the COMPASS RICH-1 photon detectors upgrade are presented focussing on detector design, engineering aspects, mass production, the quality assessment and assembly challenges of the MPGD components. The status of the detector commissioning is also presented.

Keyword(s): RICH ; COMPASS ; CsI ; MPGD ; THGEM

Total numbers of views: 258
Numbers of unique views: 130
DOI: 10.1016/j.nima.2017.02.013
 Record created 2018-01-09, last modified 2018-01-09

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