Speakers
Description
A beam monitoring system has been developed for the Water Cherenkov Test Experiment (WCTE) at CERN to identify sub-GeV e,μ,π, and p as well as tagged γ to study the response of the Water Cherenkov detector. The charged particle identification is performed using time-of-flight (TOF) and threshold aerogel Cherenkov counters (ACTs), which have 10 different indices of refraction ranging from 1.006 to 1.15. The beam momentum was tuned at the pion threshold of the aerogel. A typical light yield of 20-40 photoelectrons was achieved, whereas the muon light yield was about half of the electrons. The tagged γ system uses a compact Neodymium permanent magnet in a Halbach array configuration, which has a peak field of 1.7T and an integrated field of 0.23Tm. The momentum of the deflected positrons by the magnet after Bremsstrahlung is detected by a hodoscope. In this talk, we will present the WCTE beam monitor system and its performance. Three publications are in preparation for the ACT development, compact tagged photon equipment, and the WCTE beam monitor performance and the measurement of the CERN T9 beam flux, demonstrating the feasibility of using sub-GeV pions and muons down to 200MeV/c. The WCTE beam monitor equipment has been donated to the CERN test beam facility and will be made available to test beam users.
| Position | Research Scientist |
|---|---|
| Affiliation | TRIUMF |
| Country | Canada |