1. Hybrid MPGD-based detectors of single photons for the upgrade of COMPASS RICH-1
- Author
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M. Alexeev, M. Finger, H. Fischer, B. Gobbo, M. Gregori, F. Herrmann, K. Konigsmann, S. Levorato, A. Maggiora, N. Makke, R. Birsa, A. Martin, G. Menon, K. Novakova, J. Novy, D. Panzieri, F. A. Pereira, C. A. Santos, G. Sbrizzai, P. Schiavon, S. Schopferer, F. Bradamante, M. Slunecka, L. Steiger, M. Sulc, F. Tessarotto, J. F. C. A. Veloso, A. Bressan, M. Chiosso, P. Ciliberti, S. Dalla Torre, S. Dasgupta, O. Denisov, Alexeev, M., Birsa, Renato, Bradamante, Franco, Bressan, Andrea, Chiosso, M., Ciliberti, Piero, Dalla Torre, S., Dasgupta, SHUDDHA SHANKAR, Denisov, O., Finger, M., Fischer, H., Gobbo, Benigno, Gregori, M., Herrmann, F., Konigsmann, K., Levorato, Stefano, Maggiora, A., Makke, Nour, Martin, Anna, Menon, G., Novakova, K., Novy, J., Panzieri, D., Pereira, F. A., Santos, C. A., Sbrizzai, Giulio, Schiavon, Paolo, Schopferer, S., Slunecka, M., Steiger, Luka, Sulc, M., Tessarotto, Fulvio, and Veloso, J. F. C. A.
- Subjects
Nuclear and High Energy Physics ,Radiology, Nuclear Medicine and Imaging ,Physics::Instrumentation and Detectors ,COMPASS ,Particle detector ,Photocathode ,Thick GEM ,Optics ,Nuclear Medicine and Imaging ,Compass ,RICH ,Instrumentation ,Cherenkov radiation ,Nuclear and High Energy Physic ,Micropat-tern gas detector ,Photon detection ,Physics ,business.industry ,Detector ,MicroMegas detector ,Upgrade ,Gas electron multiplier ,Radiology ,business - Abstract
A seven year-long R&D programme has been performed and the resulting detector architecture is a hybrid MPGD including two THick GEM (THGEM) multiplication stages followed a MICROMEGAS. The first THGEM board forms the photocathode support: its upper face is CsI coated. The properties of THGEM-based photocathodes have been studied in details. The two THGEM layers act as pre-amplification stages and, thanks to a staggered configuration, namely by the misalignment of the holes of the two THGEMs, the electron shower produced in the pre-amplification phase is distributed onto a larger surface portion of the following MICROMEGAS unit, where the final multiplication takes place: it is so possible to operate at gains as high as 105 and more even in radioactive environments. COMPASS RICH-1 is a large-size Cherenkov imaging counter with gaseous radiator for hadron identification up to 50 GeV/c. The construction of a set of large-size (unit size: 60×60 cm2) gaseous photon detectors based on the hybrid MPGD architecture for the upgrade of COMPASS RICH-1 is ongoing and the upgraded detector will be in operation in 2016. The R&D studies, the engineering aspects and the construction challenges are presented.
- Published
- 2015