Performance of Multiplexed XY Resistive Micromegas detectors in a high intensity beam

We present the performance of multiplexed XY resistive Micromegas detectors tested in the CERN SPS 100 GeV/c electron beam at intensities up to 3.3 x 10(5) e(-)/(s . cm(2)). So far, all studies with multiplexed Micromegas have only been reported for tests with radioactive sources and cosmic rays. Th...

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Authors: Banerjee, D; Burtsev, V; Chumakov, A; Cooke, D; Depero, E; Dermenev, A V; Donskov, S V; Dubinin, F; Dusaev, R R; Emmenegger, S; Fabich, A; Frolov, V N; Gardikiotis, A; Gninenko, S N; Hoesgen, M; Karneyeu, A E; Ketzer, B; Kirsanov, M M; Konorov, I V; Kramarenko, V A; Kuleshov, S V; Levchenko, E; Lyubovitskij, V E; Lysan, V; Mamon, S; Matveev, V A; Mikhailov, Yu V; Myalkovskiy, V V; Peshekhonov, V D; Peshekhonov, D V; Polyakov, V A; Radics, B; Rubbia, A; Samoylenko, V D; Tikhomirov, V O; Tlisov, D A; Toropin, A N; Vasilishin, B; Arenas-Vásquez, G; Ulloa, P; Crivelli, P
Format: Article
Status:Published version
Publication date:2018
Country:Chile
Institution:Agencia Nacional de Investigación y Desarrollo
Repository:Articulos_ANID
Language:English
OAI Identifier:oai:repositorio.anid.cl:10533/250803
Online Access:https://hdl.handle.net/10533/250803
Access Level:Open access
Keyword:ODS 8: Trabajo decente y crecimiento económico
Ciencias Naturales
Ciencias Físicas
Física
Summary:We present the performance of multiplexed XY resistive Micromegas detectors tested in the CERN SPS 100 GeV/c electron beam at intensities up to 3.3 x 10(5) e(-)/(s . cm(2)). So far, all studies with multiplexed Micromegas have only been reported for tests with radioactive sources and cosmic rays. The use of multiplexed modules in high intensity environments was not explored due to the effect of ambiguities in the reconstruction of the hit point caused by the multiplexing feature. For the specific mapping and beam intensities analyzed in this work with a multiplexing factor of five, more than 50% level of ambiguity is introduced due to particle pile-up as well as fake clusters due to the mapping feature. Our results prove that by using the additional information of cluster size and integrated charge from the signal clusters induced on the XY strips, the ambiguities can be reduced to a level below 2%. The tested detectors are used in the CERN NA64 experiment for tracking the incoming particles bending in a magnetic field in order to reconstruct their momentum. The average hit detection efficiency of each module was found to be similar to 96% at the highest beam intensities. By using four modules a tracking resolution of 1.1% was obtained with similar to 85% combined tracking efficiency. (c) 2017 The Authors. Published by Elsevier B.V.

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