Characterization of the water diffusion in GEM foil material

L. Benussi; S. Bianco; G. Saviano; S. Muhammad; D. Piccolo; G. Raffone; M. Caponero; L. Passamonti; D. Pierluigi; A. Russo; F. Primavera; S. Cerbelli; A. Lalli; M. Valente; M. Ferrini; B. Teissandier; M. Taborelli; M. Parvis; S. Grassini; J. Tirilló; F. Sarasini; A.V. Franchi

doi:10.1051/epjconf/201817403005

All issues

Volume 174 (2018)

EPJ Web Conf., 174 (2018) 03005

Abstract

Open Access

Issue		EPJ Web Conf. Volume 174, 2018 4^th International Conference on Micro Pattern Gaseous Detectors (MPGD 2015)


Article Number		03005
Number of page(s)		4
Section		Production techniques
DOI		https://doi.org/10.1051/epjconf/201817403005
Published online		21 February 2018

EPJ Web of Conferences 174, 03005 (2018)
https://doi.org/10.1051/epjconf/201817403005

Characterization of the water diffusion in GEM foil material

L. Benussi¹, S. Bianco¹, G. Saviano¹^,2, S. Muhammad¹^,2^,3^a, D. Piccolo¹, G. Raffone¹, M. Caponero¹, L. Passamonti¹, D. Pierluigi¹, A. Russo¹, F. Primavera¹, S. Cerbelli², A. Lalli², M. Valente², M. Ferrini², B. Teissandier⁴, M. Taborelli⁴, M. Parvis⁵, S. Grassini⁵, J. Tirilló², F. Sarasini² and A.V. Franchi²

¹ Laboratori Nazionali di Frascati - INFN, Frascati, Italy
² University of Rome “La Sapienza” (IT) - Facoltà di Ingegneria, Ingegneria Chimica Materiali ed Ambiente, Italy
³ National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
⁴ CERN- Vacuum, Surfaces and Coatings (VSC) TE Department, Switzerland
⁵ Politecnico di Torino-Dipartimento di Fisica (DIFIS) Corso Duca degli Abruzzi, 24, I-10129 Torino, Italy

^a Corresponding author; email address: Saleh.Muhammad@cern.ch

Published online: 21 February 2018

Abstract

Systematic studies on the GEM foil material are performed to measure the moisture diffusion rate and saturation level. These studies are important because the presence of this compound inside the detector’ s foil can possibly change its mechanical and electrical properties, and in such a way, the detector performance can be affected. To understand this phenomenon, a model is developed with COMSOL Multiphysics v. 4.3 [1], which described the adsorption and diffusion within the geometry of GEM foil, the concentration profiles and the time required to saturate the foil. The COMSOL model is verified by experimental observations on a GEM foil sample. This note will describe the model and its experimental verification results.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).

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