High rate, fast timing Glass RPC for the high η CMS muon detectors

CMS RPC collaboration

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The HL-LHC phase is designed to increase by an order of magnitude the amount of data to be collected by the LHC experiments. To achieve this goal in a reasonable time scale the instantaneous luminosity would also increase by an order of magnitude up to 6·1034 cm-2s-1. The region of the forward muon spectrometer (|η| > 1.6) is not equipped with RPC stations. The increase of the expected particles flux up to 2 kHz/cm2 (including a safety factor 3) motivates the installation of RPC chambers to guarantee redundancy with the CSC chambers already present. The current CMS RPC technology cannot sustain the expected background level. The new technology that will be chosen should have a high rate capability and provide a good spatial and timing resolution. A new generation of Glass-RPC (GRPC) using low-resistivity glass is proposed to equip at least the two most far away of the four high η muon stations of CMS. First the design of small size prototypes and studies of their performance in high-rate particles flux are presented. Then the proposed designs for large size chambers and their fast-timing electronic readout are examined and preliminary results are provided.

Original languageEnglish
Article numberC09006
JournalJournal of Instrumentation
Issue number9
Publication statusPublished - 2016 Sept 9

Bibliographical note

Publisher Copyright:
© CERN 2016.


  • Gaseous detectors
  • Resistive-plate chambers
  • Timing detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics


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