Scintillation ring hodoscope with WLS fiber readout

Ivashkin, A.P.; Kudenko, Yu.G.; Mineev, O.V.; Imatato, J.

doi:10.1016/S0168-9002(97)00657-8

Scintillation ring hodoscope with WLS fiber readout

1997

11 pages

Published in:

Nucl.Instrum.Meth.A 394 (1997) 321-331

DOI:

10.1016/S0168-9002(97)00657-8

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Abstract: (Elsevier)

A simple tracking system for measuring the K + decay vertex along the beam axis in the T-Violation Experiment (E246) at KEK is described. It consists of 32 grooved BC408 plastic scintillator rings with embedded Y11 wavelength-shifting (WLS) optical fibers. Both ends of each multi-clad WLS fiber are directly viewed by a green-extended photomultiplier. Light yield of 46 photoelectrons per minimum ionizing particle in the 5 mm thick ring has been achieved. This configuration gives 1.7 mm position resolution determined purely by the 6 mm width of each ring. Time resolution of 1.0 ns and detection efficiency of 98.4% were obtained.

29.40.Gx
29.40.Mc
WLS fibers
Ring hodoscope
K+: decay modes
decay modes: K+
time reversal: violation
scintillation counter: hodoscope
scintillation counter: plastics
optics: transformation

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