The time-of-propagation counter for Belle II

Details The time-of-propagation counter for Belle II The time-of-propagation counter for Belle II

2010-09-04

arxiv.org/abs/1009.0876v1

Nucl.Instrum.Meth.A639:177-180,2011

Physics

Instrumentation and Detectors

5 pages, 5 figures, 2 tables; Submitted to special edition of NIMA, Proceedings of RICH2010

Scientific paper

10.1016/j.nima.2010.09.164

The Belle II detector operating at the future upgrade to the KEKB accelerator will perform high-statistics precision investigations into the flavor sector of the Standard Model. As charged hadron identification is a vital element of the experiment's success, the time-of-propagation (TOP) counter has been chosen as the primary particle identification device in the barrel region of Belle II. The TOP counter is a compact variant of the detection of internally reflected Cherenkov light (DIRC) technique and relies heavily on exquisite single photon timing resolution with micro-channel plate photomultiplier tubes. We discuss the general principles of TOP operation and optimization of the Belle II TOP configuration, which is expected to provide 4 sigma or better separation of kaons and pions up to momenta of approximately 4 GeV/c.

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