EPJ Web of Conferences (Jan 2018)

Characterization of the water diffusion in GEM foil material

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

DOI
https://doi.org/10.1051/epjconf/201817403005
Journal volume & issue
Vol. 174
p. 03005

Abstract

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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.