Resistive Plate Counters (RPC) detectors at the Large Hadron Collider (LHC) experiments use gas recirculation systems to cope with large gas mixture volumes and costs. In this paper a long-term systematic study about gas purifiers, gas contaminants and detector performance is discussed. The study aims at measuring the lifetime of purifiers with unused and used cartridge material along with contaminants release in the gas system. During the data-taking the response of several RPC double-gap detectors was monitored in order to characterize the correlation between dark currents, filter status and gas contaminants.
@article{arxiv.1210.1819,
title = {A study of gas contaminants and interaction with materials in RPC closed loop systems},
author = {S. Colafranceschi and R. Aurilio and L. Benussi and S. Bianco and L. Passamonti and D. Piccolo and D. Pierluigi and A. Russo and M. Ferrini and T. Greci and G. Saviano and C. Vendittozzi and M. Abbrescia and C. Calabria and A. Colaleo and G. Iaselli and M. Maggi and S. Nuzzo and G. Pugliese and P. Verwilligen and A. Sharma},
journal= {arXiv preprint arXiv:1210.1819},
year = {2015}
}