July 29, 2019 to August 2, 2019
Northeastern University
US/Eastern timezone

A Cosmic Ray Veto Detector for the Mu2e Experiment at Fermila

Jul 31, 2019, 2:00 PM
West Village G 108 (Northeastern University)

West Village G 108

Northeastern University

Oral Presentation Particle Detectors Particle Detectors


Ralf Ehrlich (Fermi National Accelerator Laboratory)


The Mu2e experiment is designed to search for the charged-lepton-flavor-violating
process, $\mu^-$ to a $e^-$, with unprecedented sensitivity. The single 105-MeV
electron that results from this process can be mimicked by cosmic-ray muons or their
products entering the detector. An active veto detector surrounding the apparatus
is used to detect incoming cosmic-ray muons. To reduce the backgrounds to the required
level it must have an average efficiency of 99.99\% and excellent hermeticity over a
large area. The detector consists of four layers of scintillator counters, each with
two embedded wavelength-shifting fibers, whose light is detected by silicon photomultipliers.
The design and expected performance of the cosmic ray veto detector will be described.

Primary authors

Prof. E. Craig Dukes (University of Virginia) Ralf Ehrlich (Fermi National Accelerator Laboratory)

Presentation materials