CMS GEM detector material study for the HL-LHC
S. Muhammad*, G. Saviano, S. Bianco, L. Benussi, D. Piccolo, G. Raffone, L. Passamonti, D. Pierluigi, A. Russo, M. Valente, M. Ferrini, F. Sarasini, A. Lalli, A.V. Franchi, J. Tirillo and M. Caponero
Pre-published on:
January 15, 2018
Published on:
March 20, 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.
DOI: https://doi.org/10.22323/1.314.0799
How to cite
Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating
very compact bibliographies which can be beneficial to authors and
readers, and in "proceeding" format
which is more detailed and complete.