Residual flux and angular distribution of high-energy cosmic muons have been measured in two underground locations at the Canfranc Underground Laboratory (LSC) using a dedicated Muon Monitor. The instrument consists of three layers of fast scintillation detector modules operating as 352 independent pixels. The monitor has flux-defining area of 1 m2, covers all azimuth angles, and zenith angles up to 80∘. The measured integrated muon flux is (5.26±0.21)×10−3 m−2s−1 in the Hall A of the LAB2400 and (4.29±0.17)×10−3 m−2s−1 in LAB2500. The angular dependence is consistent with the known profile and rock density of the surrounding mountains. In particular, there is a clear maximum in the flux coming from the direction of the Rioseta valley.
@article{arxiv.1902.00868,
title = {Cosmic-ray muon flux at Canfranc Underground Laboratory},
author = {Wladyslaw Henryk Trzaska and Maciej Slupecki and Iulian Bandac and Alberto Bayo and Alessandro Bettini and Leonid Bezrukov and Timo Enqvist and Almaz Fazliakhmetov and Aldo Ianni and Lev Inzhechik and Jari Joutsenvaara and Pasi Kuusiniemi and Kai Loo and Bayarto Lubsandorzhiev and Alexander Nozik and Carlos Peña Garay and Maria Poliakova},
journal= {arXiv preprint arXiv:1902.00868},
year = {2019}
}