Measurement of the evolution of the CsI quantum efficiency in gas photon detectors

We present an indirect measurement of possible long term variations of the CsI quantum efficiency in solid state photocathodes in MWPC. This type of photon detectors has been used since 2001 in the Cherenkov Imaging detector RICH-1 of the COMPASS experiment at CERN SPS. Data from six years of COMPAS...

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Detalles Bibliográficos
Autores principales: Alexeev, M, Birsa, R, Bradamante, F, Bressan, A, Dalla Torre, S, Duic, V, Giorgi, M, Gobbo, B, Levorato, S, Martin, A, Sbrizzai, G, Schiavon, P, Sozzi, F, Tessarotto, F
Lenguaje:eng
Publicado: 2014
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2014.05.028
http://cds.cern.ch/record/2025838
Descripción
Sumario:We present an indirect measurement of possible long term variations of the CsI quantum efficiency in solid state photocathodes in MWPC. This type of photon detectors has been used since 2001 in the Cherenkov Imaging detector RICH-1 of the COMPASS experiment at CERN SPS. Data from six years of COMPASS data taking are used to evaluate the mean number of detected photons per particle. The results do not indicate any severe CsI quantum efficiency ageing effect.

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