Measurement of Cosmic-ray Muon-induced Spallation Neutrons in the Aberdeen Tunnel Underground Laboratory

S. C. Blyth, Y. L. Chan, X. C. Chen, M. C. Chu, K. X. Cui, R. L. Hahn, T. H. Ho, Y. B. Hsiung, B. Z. Hu, K. K. Kwan, M. W. Kwok, T. Kwok, Y. P. Lau, J. K.C. Leung, K. Y. Leung, Guey-Lin Lin, Y. C. Lin, K. B. Luk, W. H. Luk, H. Y. Ngai*S. Y. Ngan, C. S.J. Pun, K. Shih, Y. H. Tam, R. H.M. Tsang, C. H. Wang, C. M. Wong, H. L. Wong, K. K. Wong, M. Yeh, B. J. Zhang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Muon-induced neutrons are one of the major backgrounds to various underground experiments, such as dark matter searches, low-energy neutrino oscillation experiments and neutrino-less double beta-decay experiments. Previous experiments on the underground production rate of muon-induced neutrons were mostly carried out either at shallow sites or at very deep sites. The Aberdeen Tunnel experiment aims to measure the neutron production rate at a moderate depth of 611 meters water equivalent. Our apparatus comprises of six layers of plastic-scintillator hodoscopes for tracking the incident cosmic-ray muons, and 760 L of gadolinium-doped liquid-scintillator for both neutron production and detection targets. In this paper, we describe the design and the performance of the apparatus. The preliminary result on the measurement of neutron production rate is also presented.

Original languageEnglish
Pages (from-to)2675-2677
Number of pages3
JournalNuclear and Particle Physics Proceedings
Volume273-275
DOIs
StatePublished - 1 Apr 2016

Keywords

  • Aberdeen Tunnel
  • Cosmic-ray muon
  • Spallation neutron
  • Underground laboratory

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