Volume 489 - Third Italian Workshop on the Physics at High Intensity (WIFAI2024) - Young Scientists Forum
A hydrogen-filled Cherenkov detector for Kaon tagging at the NA62 experiment at CERN
A. Tomczak*  on behalf of the NA62 Collaboration
*: corresponding author
Full text: pdf
Published on: December 05, 2025
Abstract
The NA62 experiment at CERN uses a Cherenkov differential counter with achromatic ring focus
(CEDAR) with a bespoke readout system to identify charged kaons in an unseparated hadron beam.
A new hydrogen-filled CEDAR (CEDAR-H) was constructed to reduce the amount of material
in the path of the beam, including an optical system accounting for the dispersive properties
of hydrogen. The new detector was designed using detailed simulation, with its performance
validated during a test beam at CERN. The CEDAR-H was installed and commissioned at the NA62
experiment in early 2023. The detector improves on the previously used nitrogen-filled CEDAR
and exceeds the requirements of both the efficiency of kaon identification and the resolution on
determining the kaon crossing time.
DOI: https://doi.org/10.22323/1.489.0047
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