High intensity chopper spectrometer 4SEASONS at J-PARC

R. Kajimoto, T. Yokoo, K. Nakajima, M. Nakamura, K. Soyama, T. Ino, S. Shamoto, M. Fujita, Kenji Ohoyama, H. Hiraka, K. Yamada, M. Arai

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24 Citations (Scopus)


Design and performance of a new chopper spectrometer 4SEASONS, which is under construction for the spallation neutron source at Japan Proton Accelerator Research Complex (J-PARC), are described. This spectrometer has middle energy resolution and two orders higher performance than current state-of-theart chopper spectrometers by utilizing a unique beam transport design and the repetition rate multiplication (RRM) method. 4SEASONS has a specification optimized for the study of the high critical temperature (Tc) superconductivity, and should be suitable for collecting weak inelastic signals from a single crystal over a wide four-dimensional (4D) Q-ω space.

Original languageEnglish
Pages (from-to)5-12
Number of pages8
JournalJournal of Neutron Research
Issue number1
Publication statusPublished - 2007 Jan 1


  • Chopper spectrometer
  • High-T superconductivity
  • Inelastic neutron scattering
  • J-PARC
  • Spallation neutron source

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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    Kajimoto, R., Yokoo, T., Nakajima, K., Nakamura, M., Soyama, K., Ino, T., Shamoto, S., Fujita, M., Ohoyama, K., Hiraka, H., Yamada, K., & Arai, M. (2007). High intensity chopper spectrometer 4SEASONS at J-PARC. Journal of Neutron Research, 15(1), 5-12. https://doi.org/10.1080/10238160601048742