High intensity chopper spectrometer 4SEASONS at J-PARC

Article type: Research Article

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

Affiliations: Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan | Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan | Institute of Materials Research, Tohoku University, Sendai 980-8577, Japan

Note: [] Corresponding author. Email: [email protected]

Abstract: 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-the-art 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.

Keywords: J-PARC, Spallation neutron source, Chopper spectrometer, Inelastic neutron scattering, High-Tc superconductivity

DOI: 10.1080/10238160601048742

Journal: Journal of Neutron Research, vol. 15, no. 1, pp. 5-12, 2007