RE3/1 & RE4/1 RPC chambers integration in the inner region of the forward muon spectrometer in the CMS experiment

CMS Collaboration

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1 Citation (Scopus)


The high pseudorapidity (η) region of the Compact Muon Solenoid (CMS) muon system is covered by Cathode Strip Chambers only and lacks redundant coverage despite the fact that it is a challenging region for muons in terms of backgrounds and momentum resolution. During the annual Year-End Technical Stops 2022 & 2023, two new layers of improved Resistive Plate Chambers (iRPC) will be added, RE3/1 & RE4/1, which will completely cover the region of 1:8 < |η| < 2:4 in the endcap. Thus, the additional new chambers will lead to an increased efficiency for both trigger and offline reconstruction in the difficult region where the background is the highest and the magnetic field is the lowest within the muon system. The extended RPC system will improve the performance and the robustness of the muon trigger. The final design of iRPC chambers and the procedure to integrate and install them in the CMS muon system have been finalized. In this report, the main results demonstrating the implementation and installation of the new iRPC detectors in the CMS muon system at high |η| region will be presented.

Original languageEnglish
Article numberC10027
JournalJournal of Instrumentation
Issue number10
Publication statusPublished - Oct 2019


  • Detector design and construction technologies and materials
  • Muon spectrometers
  • Overall mechanics design (support structures and materials, vibration analysis etc)
  • Resistive-plate chambers

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

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