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Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN

The Compact Muon Solenoid (CMS) is one of the four Experiments operating at the Large Hadron Collider (LHC) at CERN. Since Muons represent a very clean probe for many events of interest, the Muon detection system has a fundamental importance for identification and a detailed characterization of p...

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Autor principal: Arena, Maria Cristina
Lenguaje:eng
Publicado: 2021
Materias:
Acceso en línea:http://cds.cern.ch/record/2790110
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author Arena, Maria Cristina
author_facet Arena, Maria Cristina
author_sort Arena, Maria Cristina
collection CERN
description The Compact Muon Solenoid (CMS) is one of the four Experiments operating at the Large Hadron Collider (LHC) at CERN. Since Muons represent a very clean probe for many events of interest, the Muon detection system has a fundamental importance for identification and a detailed characterization of particles collision in LHC Experiments. Each muon station consists of several layers of aluminum drift tubes (DT) in the barrel region and cathode strip chambers (CSC) in the endcap region, complemented by resistive plate chambers (RPC), both in barrel and endcap region. The Muon detector system is based on gaseous detectors, which works through the gas ionization. The main component of gas detectors is the gas mixture that must be correct and stable for the properly functioning of systems and the use of expensive and greenhouse gases cannot be avoided because of physic requirements that impose certain choices on the gas mixture composition. Therefore, the aim of this thesis consists in a detailed study of the CF4 recuperation system, used for the CMS CSC detector (that operates with a gas mixture of Ar/CO2/CF4 40/50/10), with the final goal of optimizing its economic and environmental efficiency. Based on warm separation process, the recovery system includes membranes and adsorption modules for CO2 and CF4 and an efficient CO2 removal is mandatory to reach a good CF4 adsorption capacity. The CF4 Membrane Module and the CF4 Absorber Module were studied and optimized in the light of gas chromatography measurements. The effects of experimental parameters affecting the overall functioning of the modules, such as the input flow stream and gas pressure, have been investigated. In the light of the experimental evidence reported in this Thesis, the new membrane module setup and CF4 absorber configuration ensure a remarkable increase of the average weekly efficiency from ~45% in the period November 2020-January 2021 to ~66% in the period February-June 2021.
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language eng
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spelling cern-27901102021-11-11T23:01:56Zhttp://cds.cern.ch/record/2790110engArena, Maria CristinaOptimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERNChemical Physics and ChemistryDetectors and Experimental TechniquesThe Compact Muon Solenoid (CMS) is one of the four Experiments operating at the Large Hadron Collider (LHC) at CERN. Since Muons represent a very clean probe for many events of interest, the Muon detection system has a fundamental importance for identification and a detailed characterization of particles collision in LHC Experiments. Each muon station consists of several layers of aluminum drift tubes (DT) in the barrel region and cathode strip chambers (CSC) in the endcap region, complemented by resistive plate chambers (RPC), both in barrel and endcap region. The Muon detector system is based on gaseous detectors, which works through the gas ionization. The main component of gas detectors is the gas mixture that must be correct and stable for the properly functioning of systems and the use of expensive and greenhouse gases cannot be avoided because of physic requirements that impose certain choices on the gas mixture composition. Therefore, the aim of this thesis consists in a detailed study of the CF4 recuperation system, used for the CMS CSC detector (that operates with a gas mixture of Ar/CO2/CF4 40/50/10), with the final goal of optimizing its economic and environmental efficiency. Based on warm separation process, the recovery system includes membranes and adsorption modules for CO2 and CF4 and an efficient CO2 removal is mandatory to reach a good CF4 adsorption capacity. The CF4 Membrane Module and the CF4 Absorber Module were studied and optimized in the light of gas chromatography measurements. The effects of experimental parameters affecting the overall functioning of the modules, such as the input flow stream and gas pressure, have been investigated. In the light of the experimental evidence reported in this Thesis, the new membrane module setup and CF4 absorber configuration ensure a remarkable increase of the average weekly efficiency from ~45% in the period November 2020-January 2021 to ~66% in the period February-June 2021.CERN-THESIS-2021-189oai:cds.cern.ch:27901102021-11-09T16:23:59Z
spellingShingle Chemical Physics and Chemistry
Detectors and Experimental Techniques
Arena, Maria Cristina
Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title_full Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title_fullStr Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title_full_unstemmed Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title_short Optimization of CF4 recuperation from the gas mixture used in the CSC gas system at the Compact Muon Solenoid (CMS) at CERN
title_sort optimization of cf4 recuperation from the gas mixture used in the csc gas system at the compact muon solenoid (cms) at cern
topic Chemical Physics and Chemistry
Detectors and Experimental Techniques
url http://cds.cern.ch/record/2790110
work_keys_str_mv AT arenamariacristina optimizationofcf4recuperationfromthegasmixtureusedinthecscgassystematthecompactmuonsolenoidcmsatcern