High-intensity and versatile chopper spectrometer project for J-PARC

T. J. Sato, O. Yamamuro, K. Hirota, M. Shibayama, H. Yoshizawa, S. Itoh, S. Watanabe, T. Asami, K. Kindo, Y. Uwatoko, T. Kanaya

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1 Citation (Scopus)


We have proposed a versatile inelastic neutron spectrometer (VINS) for the spallation neutron source at the Materials and Life Science Facility, Japan Proton Accelerator Research Complex. This is a directgeometry Fermi chopper spectrometer, aimed at realizing a very high neutron flux with reasonable energy and Q resolutions. A wide energy-transfer range of 0.5 < E < 1000meV will be covered with two energy-resolution modes, δE/Ei 5 and 2.5%. Q range will also be considerably large as up to 40Å-1 at Ei = 1000 meV, enabled by an array of detectors covering -30 < 2θ < 130° (2.8 Sr). Preliminary Monte Carlo simulation predicts the maximum flux of 106 neutrons/cm2/s at the sample position for Ei = 10meV (assuming that the neutron source is running at 1 MW). With the remarkably high neutron flux, VINS will be a unique tool for various types of condensed matter research, in particular, those which have never been explored by inelastic neutron scattering due to sample size restriction.

Original languageEnglish
Pages (from-to)113-119
Number of pages7
JournalJournal of Neutron Research
Issue number3-4
Publication statusPublished - 2008


  • Chopper spectrometer
  • Direct geometry
  • Neutron scattering


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