Title of article
Scintillation ring hodoscope with WLS fiber readout
Author/Authors
Ivashkin، نويسنده , , A.P. and Kudenko، نويسنده , , Yu.G. and Mineev، نويسنده , , O.V. and Imazato، نويسنده , , J.، نويسنده ,
Pages
11
From page
321
To page
331
Abstract
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.
Keywords
WLS fibers , Ring hodoscope
Journal title
Astroparticle Physics
Record number
2002370
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