Curved neutron guide of the cold neutron disk-chopper spectrometer at J-PARC

R. Kajimoto, K. Nakajima, M. Nakamura, T. Osakabe, T. J. Sato, M. Arai

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We have investigated the usefulness of a curved guide for the cold neutron disk-chopper spectrometer (CNDCS), which is under construction for the Japan Proton Accelerator Research Complex (J-PARC), by Monte Carlo simulation. By comparing with a model with a straight guide and a T0 chopper, we found that the curved guide can show comparable performance with the straight guide in the whole energy range of CNDCS when L1 ≥ 30 m. Interestingly, the curved guide surpasses the straight guide in neutron flux at E ≤ 20 meV, where CNDCS is optimized, because of the loss of flux at the gap for the T0 chopper in the straight guide.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalJournal of Neutron Research
Issue number3-4
Publication statusPublished - 2008 Jan 1
Externally publishedYes


  • Chopper spectrometer
  • J-PARC
  • Neutron transport
  • Spallation neutron source

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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