# PSD12: The 12th International Conference on Position Sensitive Detectors

Sep 12 – 17, 2021
University of Birmingham
Europe/London timezone

## High rate capability studies of triple-GEM detectors for the ME0 upgrade of the CMS muon spectrometer

Sep 13, 2021, 12:05 PM
15m
Teaching and Learning Building (University of Birmingham)

### Teaching and Learning Building

#### University of Birmingham

Edgbaston Campus University of Birmingham B15 2TT UK
talk Gas-based Detectors

### Speaker

Luis Felipe Ramirez Garcia (Universidad de Antioquia (CO))

### Description

The high-luminosity LHC (HL-LHC) upgrade sets a new challenge for particle detector technologies. In the CMS muon system gaseous detectors, the increase in luminosity will produce a particle background ten times higher than at the LHC. To cope with the high rate environment and maintain performance, the triple-Gas Electron Multiplier (GEM) technology was chosen for the high-rate capable detectors for the CMS ME0 upgrade project in the innermost region of the forward muon spectrometer. An intense $R\&D$ and prototype phase is ongoing to verify that such technology meets the stringent performance requirements of highly efficient particle detection in the harsh background environment expected in the innermost ME0 region. We describe recent rate capability studies on triple-GEM detectors operated with an $Ar/CO_2 \, (70/30)$ gas mixture at an effective gas gain of $2 \times 10^4$ by using a high-intensity $22 \, \rm{keV}$ X-ray generator. In light of these rate capability studies, a novel foil design for the ME0 detectors was developed based on double-sided segmented GEM-foils and a high voltage distribution and filtering system. We describe the impact of the new design on detector performance and present a summary of ongoing R&D activities.

Nationality Colombian luis.felipe.ramirez.garcia@cern.ch Luis Felipe Ramirez Garcia Universidad de Antioquia

### Primary author

Luis Felipe Ramirez Garcia (Universidad de Antioquia (CO))

### Co-authors

Michele Bianco (CERN) Dr Francesco Fallavollita (CERN) Davide Fiorina (Universita & INFN Pavia) Antonello Pellecchia (Universita e INFN, Bari (IT)) Nicole Rosi (Universita and INFN (IT))