Abstract
We have constructed and tested the upstream veto counter for the K2K long baseline neutrino oscillation experiment. The upstream veto counter was constructed in such a way that two VENUS scintillators were read out via a single photomultiplier tube at each end. Timing resolutions and efficiencies of the veto counter were better than 1.0 ns and 99% in the active region of the scintillators, respectively. Energy resolutions of the veto counter are also better than 20% between the far end and the center of the scintillators. We conclude that the upstream veto counter meets requirements to reject backgrounds such as cosmic muons and beam-related muons from the upstream water Cherenkov counter and to separate beam-induced electrons from muons.
Original language | English |
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Pages (from-to) | 558-571 |
Number of pages | 14 |
Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
Volume | 451 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2000 Sept 11 |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation