# Triple GEM performance in magnetic field.

@article{Alexeev2019TripleGP,
title={Triple GEM performance in magnetic field.},
author={M. Alexeev and A. Amoroso and S. Bagnasco and R. Ferroli and I. Balossino and G.Bencivenni and M. Bertani and D. Bettoni and F. Bianchi and A. Bortone and A. Calcaterra and M.Capodiferro and V. Carassiti and S. Cerioni and J. Chai and W. Cheng and S. Chiozzi and G.Cibinetto and A. Ramusino and G. Cotto and F. Cossio and M. Rolo and F. Mori and M. Destefanis and D. Domenici and J. Dong and F. Evangelisti and R. Farinelli and L. Fava and G. Felici and E. Fioravanti and L. Gaido and I. Garzia and M. Gatta and G. Giraudo and M. Greco and L.Lavezzi and C. Leng and H. Li and P. Li and S. Lusso and M. Maggiora and R. Malaguti and A. Mangoni and S. Marcello and M. Melchiorri and G. Mezzadri and G. Morello and M. Mignone and E. Pace and S.Pacetti and G. Papalino and B. Passalacqua and P. Patteri and A. Pelosi and M. Lener and A.Rivetti and M. Savri'e and M. Scodeggio and S. Sosio and S. Spataro and E. Tskhadadze and S.Verma and L. Yan and B. Wang and R. J. Weadon and J. Zhang},
journal={arXiv: Instrumentation and Detectors},
year={2019}
}
Performance of triple GEM prototypes in strong magnetic field has been evaluated bymeans of a muon beam at the H4 line of the SPS test area at CERN. Data have been reconstructedand analyzed offline with two reconstruction methods: the charge centroid and the micro-Time-Projection-Chamber exploiting the charge and the time measurement respectively. A combinationof the two reconstruction methods is capable to guarantee a spatial resolution better than 150{\mu}min magnetic field up to a 1 T.
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