MPGD-based photon detectors for the upgrade of COMPASS RICH-1 and beyond
Abstract
COMPASS is a fixed target experiment at CERN SPS aimed to study hadron structure and spectroscopy. Hadron identification in the momentum range between and is provided by a large gaseous Ring Imaging Cherenkov Counter, RICH-1. To cope with the challenges imposed by the new physics program of COMPASS, RICH-1 has been upgraded by replacing four MWPC-based photon detectors with newly developed MPGD-based photon detectors. The architecture of the novel detectors is a hybrid combination of two layers of THGEMs and a Micromegas. The top of the first THGEM is coated with CsI acting as a reflective photo-cathode. The anode is segmented in pads capacitively coupled to the APV-25 based readout. The new hybrid detectors have been commissioned during the 2016 COMPASS data taking and stably operated during the 2017 run. In this paper design, construction, operation and performance aspects of the novel photon detectors for COMPASS RICH-1 are discussed.
Keywords
Cite
@article{arxiv.2006.10447,
title = {MPGD-based photon detectors for the upgrade of COMPASS RICH-1 and beyond},
author = {J. Agarwala and M. Alexeev and C. D. R. Azevedo and F. Bradamante and A. Bressan and M. Buchele and C. Chatterjee and M. Chiosso and A. Cicuttin and P. Ciliberti and M. L. Crespo and S. Dalla Torre and S. Dasgupta and O. Denisov and M. Finger and M. Finger and H. Fischer and L. García Ordóñez and M. Gregori and G. Hamar and F. Herrmann and S. Levorato and A. Martin and G. Menon and D. Panzieri and G. Sbrizzai and S. Schopferer and M. Slunecka and M. Sulc and F. Tessarotto and J. F. C. A. Veloso and Y. X. Zhao},
journal= {arXiv preprint arXiv:2006.10447},
year = {2020}
}
Comments
11 Pages; 9 Figures; 8 Sections including References; 18 References; Proceedings for INSTR20 conference accepted in JINST for publication