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Journal of Neutron Research Volume 15, 2007 - Issue 1
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Original Articles

High Intensity Chopper Spectrometer 4Seasons At J-parc

R. Kajimoto Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, JapanCorrespondence[email protected]
,
T. Yokoo Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, 305-0801, Japan
,
K. Nakajima Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
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M. Nakamura Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
,
K. Soyama Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
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T. Ino Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, 305-0801, Japan
,
S. Shamoto Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
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M. Fujita Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan
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K. Ohoyama Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan
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H. Hiraka Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan
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K. Yamada Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan
&
M. Arai Quantum Beam Science Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan
 show all
Pages 5-12 | Received 17 Feb 2006, Accepted 29 Apr 2006, Published online: 13 Oct 2011
 
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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 (T c) superconductivity, and should be suitable for collecting weak inelastic signals from a single crystal over a wide four-dimensional (4D) Q-ω space.

Acknowledgements

The authors thank K. Oikawa for valuable comments on the transport design. 4SEASONS is supported by Grant-in-Aid for Specially Promoted Research, Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (No. 17001001).

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