TOP detector for particle identification at Belle II
arxiv(2024)
Abstract
The Time-Of-Propagation (TOP) counter is a ring-imaging Cherenkov detector
designed to identify the charged hadrons in the barrel region of the Belle II
detector. The Belle II experiment collected data delivered by the SuperKEKB
accelerator from March 2019 to June 2022. After the first run period (Run1) a
long shutdown (LS1) was dedicated to implement several accelerator and detector
upgrades. The most important upgrade was the completion of the vertex detector.
The second collision period (Run2), started in January 2024. The components of
the TOP detector and the performance during the Run1 will be reported, the
detector upgrade during LS1 and the future upgrades will be described.
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