Upstream veto counter for the K2K long baseline neutrino oscillation experiment

Citation
Sh. Ahn et al., Upstream veto counter for the K2K long baseline neutrino oscillation experiment, NUCL INST A, 451(3), 2000, pp. 558-571
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
451
Issue
3
Year of publication
2000
Pages
558 - 571
Database
ISI
SICI code
0168-9002(20000911)451:3<558:UVCFTK>2.0.ZU;2-J
Abstract
We have constructed and tested the upstream veto counter for the K2K long b aseline neutrino oscillation experiment. The upstream veto counter was cons tructed in such a way that two VENUS scintillators were read out via a sing le 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 t he scintillators, respectively. Energy resolutions of the veto counter are also better than 20% between the far end and the center of the scintillator s. We conclude that the upstream veto counter meets requirements to reject backgrounds such as cosmic muons and beam-related muons from the upstream w ater Cherenkov counter and to separate beam-induced electrons from muons. ( C) 2000 Published by Elsevier Science B.V. All rights reserved.