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Design and Implementation of the Cosmic Ray Tagger System for the ICARUS detector at FNAL

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arxiv 2501.03034 v1 pith:DB74QEHK submitted 2025-01-06 hep-ex physics.ins-det

Design and Implementation of the Cosmic Ray Tagger System for the ICARUS detector at FNAL

classification hep-ex physics.ins-det
keywords cosmicsystemfermilabinteractionsneutrinoraysargonbackground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The ICARUS-T600 Liquid Argon Time Projection Chamber is operating at Fermilab at shallow depth and thus exposed to a high flux of cosmic rays that can fake neutrino interactions. A cosmic ray tagging (CRT) system ($\sim$1100 m$^2$), surrounding the cryostat with two layers of fiber embedded plastic scintillators, was developed to mitigate the cosmic ray induced background. Using nanosecond-level timing information, the CRT can distinguish incoming cosmic rays from outgoing particles from neutrino interactions in the TPC. In this paper an overview of the CRT system, its installation and commissioning at Fermilab, and its performance are discussed.

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