First observation of Cherenkov rings with a large area CsI-TGEM-based RICH prototype

V. Peskov, G. Bencze, A. Di Mauro, P. Martinengo, D. Mayani, L. Molnar, E. Nappi, G. Paic, N. Smirnov, H. Anand, I. Shukla

Research output: Contribution to journalArticle

13 Citations (Scopus)


We have built a RICH detector prototype consisting of a liquid C 6F 14 radiator and six triple Thick Gaseous Electron Multipliers (TGEMs), each of them having an active area of 10×10 cm 2. One triple TGEM has been placed behind the liquid radiator in order to detect the beam particles, whereas the other five have been positioned around the central one at a distance to collect the Cherenkov photons. The upstream electrode of each of the TGEM stacks has been coated with a 0.4 μm thick CsI layer. In this paper, we will present the results from a series of laboratory tests performed with this prototype carried out using UV light, 6 keV photons from 55Fe and electrons from 90Sr as well as recent results of tests with a beam of charged pions where for the first time Cherenkov Ring images have been successfully recorded with TGEM photodetectors. The achieved results prove the feasibility of building Cherenkov detector based on CsI coated TGEMs.

Original languageEnglish
Pages (from-to)154-158
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication statusPublished - Dec 11 2012


  • CsI
  • MPGD
  • RICH
  • TGEM

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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