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Cosmic-ray test of a time-of-flight detector for double-strangeness experiments at J-PARC
- Authors
- Kim, S. H.; Hwang, S. H.; Ahn, J. K.; Ekawa, H.; Hayakawa, S.; Hong, B.; Hosomi, K.; Imai, K.; Kim, M. H.; Lee, J. Y.; Moon, T. J.; Ryu, S. Y.; Sako, H.; Takahashi, T.; Tanida, K.
- Issue Date
- 21-9월-2015
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Time-of-flight detector; Plastic scintillator; Particle identification
- Citation
- NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.795, pp.39 - 44
- Indexed
- SCIE
SCOPUS
- Volume
- 795
- Start Page
- 39
- End Page
- 44
- ISSN
- 0168-9002
- Abstract
- We have developed a Lime-of-flight (Ton array consisting of 24 plastic scintillators for triggering and Liming measurements in a series of planned experiments to study double-strangeness hadronic and nuclear systems at the K1.8 beamline of J-PARC. Each ToF sciraillator is 180 cm long with a cross-section of 8 x 3 cm(2), and is read out by H1949-50 photornultiplier tubes at both ends. The Liming and attenuation properties of the scintillators are measured using cosmic ray muons and beta rays from Sr-90. The cosmic-ray muon events are triggered by three pairs of 120-cm-long plastic scintillators, sandwiching the ToF array. The intrinsic time resolutions of the scintillators are estimated to be in the range 60-100 ps, which is adequate for reliable separation between pi and K at 1.2 GeV/c. The attenuation length is measured to be approximately 210 cm, which is half that for a bulk scintillator. (C) 2015 Elsevier B.V. All rights reserved.
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