Transport Properties of operational gas mixtures used at LHC

Details Transport Properties of operational gas mixtures used at LHC Transport Properties of operational gas mixtures used at LHC

2011-10-31

arxiv.org/abs/1110.6761v1

Physics

Instrumentation and Detectors

35 pages

Scientific paper

This report summarizes some useful data on the transport characteristics of gas mixtures which are required for detection of charged particles in gas detectors. We try to replace Freon used for RPC detector in the CMS experiment with another gas while maintaining the good properties of the Freon gas mixture unchanged. We try to switch to freonless gas mixture because Freon is not a green gas, it is very expensive and its availability is decreasing. Noble gases like Ar, He, Ne and Xe (with some quenchers like carbon dioxide, methane, ethane and isobutene) are investigated. Transport parameters like drift velocity, diffusion, Townsend coefficient, attachment coefficient and Lorentz angle are computed using Garfield software for different gas mixtures and compared with experimental data.

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