A study on the Gaseous Electron Multiplier (GEM) foil material is performed to determine the moisture diffusion rate, moisture saturation level and the effects on its mechanical properties. The study is focused on the foil contact with ambient air and moisture to determine the value of the diffusion coefficient of water in the foil material. The presence of water inside the detector foil can determine the changes in its mechanical and electrical properties. A simulated model is developed with COMSOL Multiphysics v. 4.3 [1] by taking into account the real GEM foil (hole dimensions, shapes and material), which describes the adsorption of water. This work describes the model, its experimental verification, the water diffusion within the entire sheet geometry of the GEM foil, thus gaining concentration profiles and the time required to saturate the system and the effects on the mechanical properties.
Cms gem detector material study for the hl-lhc / Muhammad, S.; Saviano, G.; Bianco, S.; Benussi, L.; Piccolo, D.; Raffone, G.; Passamonti, L.; Pierluigi, D.; Russo, A.; Valente, M.; Ferrini, M.; Sarasini, F.; Lalli, A.; Franchi, A. V.; Tirilló, J.; Caponero, M.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 314:PoS EPS-HEP2017 (2017) 799(2018), pp. 1-4. (Intervento presentato al convegno 2017 European physical society conference on high energy physics tenutosi a Venice; Italy) [10.22323/1.314.0799].
Cms gem detector material study for the hl-lhc
Muhammad, S.;Saviano, G.;Valente, M.;Ferrini, M.;Sarasini, F.;Tirilló, J.;
2018
Abstract
A study on the Gaseous Electron Multiplier (GEM) foil material is performed to determine the moisture diffusion rate, moisture saturation level and the effects on its mechanical properties. The study is focused on the foil contact with ambient air and moisture to determine the value of the diffusion coefficient of water in the foil material. The presence of water inside the detector foil can determine the changes in its mechanical and electrical properties. A simulated model is developed with COMSOL Multiphysics v. 4.3 [1] by taking into account the real GEM foil (hole dimensions, shapes and material), which describes the adsorption of water. This work describes the model, its experimental verification, the water diffusion within the entire sheet geometry of the GEM foil, thus gaining concentration profiles and the time required to saturate the system and the effects on the mechanical properties.| File | Dimensione | Formato | |
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