Conveners
Longevity studies: Longevity studies 1
- Atsuhiko Ochi (Kobe University (JP))
Longevity studies: Longevity studies 2
- Maxim TITOV (CEA Saclay)
The NSW Micromegas chambers in the ATLAS forward muon
spectrometer are subject to background rates of 15-20 kHz/cm$^2$
under HL-LHC conditions.
Typical anode currents will be around 6 $\mu$A on an area of 1440 cm$^2$
in the innermost part closest to the beamline.
Due to the late change of the detectorgas from non-ageing Ar:CO2 93:7
to the more HV stable ternary mixture Ar:CO2:isobutane...
As part of the high-luminosity LHC (HL-LHC) upgrade, the CMS muon spectrometer will extend its coverage in the very forward region with triple-GEM detectors. These detectors will cope with a harsh environment with expected background fluxes up to 150 kHz/cm^2. At the end of HL-LHC operation, the total accumulated charge at the hottest point is expected to reach 7.9 C/cm^2. This accumulated...
The High Luminosity LHC (HL-LHC) program will pose a great challenge for the CMS Muon System. Existing subdetectors, which consist of Drift Tubes (DT), Resistive Plate Chambers (RPC) and Cathode Strip Chambers (CSC), will have to operate at 5 times larger instantaneous luminosity than the designed for, and, consequently, will have to sustain about 10 times the original LHC integrated...
The ATLAS muon spectrometer will face an increase of particle rate, specially at high rapidity, consequently of the larger instantaneous luminosity for the HL-LHC phase, expected to attain 5x10$^{34}$ cm$^{−2}$s$^{−1}$.
The New Small Wheel (NSW) of the ATLAS muon spectrometer endcap is equipped with small-strip Thin Gap Chambers (sTGC) and Micromegas (MM), able to provide good tracking and...
Study of the gaseous detectors longevity is essentially important in view of the future LHC upgrade into the High Luminosity mode. Longevity and performance of two Cathode Strip Chamber types, different in design and experiencing the highest backround level at CMS, are being studied at the Gamma Irradiation Facility (CERN).
The irradiation started in 2016 and now the accumulated charge per...
The present Compact Muon Solenoid (CMS) Resistive Plate Chambers (RPC) system has been certified for 10 years of Large Hadron Collider (LHC) operation at a maximum background rate of 300 Hz/cm^2 and integrated charge of 50 mC/cm^2. In the next years, during the Phase 2 of the LHC physics program, called High Luminosity LHC (HL-LHC), the accelerator will increase the instantaneous luminosity up...
