Speaker
Description
540 Cathode Strip Chambers (CSC) trigger muon events and provide precise measurements of muon track coordinates in the CMS endcap region. CMS CSCs operate with 40%Ar+50%CO2+10%CF4 as a working gas mixture where CF4 provides protection against anode wire aging. However, CF4 has a Global Warming Potential (GWP) of 6630 over 100 years, and is subject to the European Union F-gas regulation which aims significant reduction of F-gas emission by 2030. Along with operation of the CF4 recuperation plant, reduction of CF4 content in the CSC working gas mixture may be an option for future operation.
In view of the upcoming LHC upgrade into the High Luminosity mode, reliable prediction and monitoring of the CSC longevity is an important task. Several accelerated irradiation tests with reduced CF4 content are being done with small CSC prototypes and full-scale chambers. Precise measurements and monitoring of the CSC gas gain in-situ to detect any possible early signs of aging are being developed as well.
| Position | PhD Student |
|---|---|
| Affiliation | University of Florida |
| Country | USA |
