Cosmic-ray test of a time-of-flight detector for double-strangeness experiments at J-PARC

S. H. Kim, S. H. Hwang, J. K. Ahn, H. Ekawa, S. Hayakawa, B. Hong, K. Hosomi, K. Imai, M. H. Kim, J. Y. Lee, T. J. Moon, S. Y. Ryu, H. Sako, T. Takahashi, K. Tanida

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We have developed a time-of-flight (ToF) array consisting of 24 plastic scintillators for triggering and timing 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 scintillator is 180 cm long with a cross-section of 8×3cm2, and is read out by H1949-50 photomultiplier tubes at both ends. The timing and attenuation properties of the scintillators are measured using cosmic-ray muons and β rays from 90Sr. 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 π and K at 1.2GeV/c. The attenuation length is measured to be approximately 210 cm, which is half that for a bulk scintillator.

本文言語English
ページ(範囲)39-44
ページ数6
ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
795
DOI
出版ステータスPublished - 2015 6 10
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学

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