Browsing by Author "Azevedo, C. D. R."
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- ItemThe hybrid MPGD-based photon detectors of COMPASS RICH-1(2020) Agarwala, J.; Alexeev, M.; Azevedo, C. D. R.; Bradamante, F.; Bressan, A.; Buechele, M.; Chatterjee, C.; Chiosso, M.; Cicuttin, A.; Ciliberti, P.; Crespo, M. L.; Dalla Torre, S.; Dasgupta, S.; Denisov, O.; Finger, M.; Finger, M., Jr.; Fischer, H.; Gregori, M.; Hamar, G.; Herrmann, F.; Levorato, S.; Martin, A.; Menon, G.; Panzieri, D.; Sbrizzai, G.; Schopferer, S.; Slunecka, M.; Tessarotto, F.; Veloso, J. F. C. A.; Zhao, Y.; Šulc, MiroslavNovel gaseous detectors of single photons for RICH applications have been developed and installed on COMPASS RICH-1 in 2016, covering a total area of 1.4 m(2). They have a hybrid architecture consisting of two staggered THGEM layers (one equipped with a CsI photoconverting layer) and a bulk Micromegas and operate stably and efficiently, providing a single photon angular resolution of similar to 1.8 mrad and about 10 detected photons per ring at saturation. The main aspects of their construction, commissioning, characterization and performance are presented.
- ItemThe MPGD-based photon detectors for the upgrade of COMPASS RICH-1 and beyond(2019-08-21) Agarwala, J.; Alexeev, M.; Azevedo, C. D. R.; Bradamante, F.; Bressan, A.; Buechele, M.; Chiosso, M.; Chatterjee, C.; Cicuttin, A.; Ciliberti, P.; Crespo, M. L.; Dalla Torre, S.; Dasgupta, S.; Denisov, O.; Finger, M.; Finger, M., Jr.; Fischer, H.; Gregori, M.; Hamar, G.; Herrmann, F.; Levorato, S.; Martin, A.; Menon, G.; Panzieri, D.; Sbrizzai, G.; Schopferer, S.; Slunecka, M.; Šulc, Miroslav; Tessarotto, F.; Veloso, J. F. C. A.; Zhao, Y.; COMPASS CollaborationAfter pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5 m(2) have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. They are the first application in an experiment of MPGD-based single photon detectors. All aspects of the upgrade are presented, including engineering, mass production, quality assessment and performance. Perspectives for further developments in the field of gaseous single photon detectors are also presented.