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Abstract
The J-PARC JSNS target station is a 1-MW source and will receive 333μA of 3-GeV protons. The proton pulse will have a width of 1μs and a repetition rate of 25-Hz. Those parameters for the accelerator have been well considered from neutron experimental points of view, and will provide a very high performance and uniqueness concerning the instrument suite at JSNS. The repetition rate of 25-Hz will give a wide dynamical range in one frame for time-of-flight measurements and a high impulse intensity for each neutron burst. The repetition rate of 25-Hz is a great compromise to satisfy both high-energy spectroscopy and slow-neutron experiments, and is also good for high-resolution instruments with long flight paths.
Acknowledgments
Design work on JSNS instruments has been done under collaboration with K. Soyama, I. Tanaka, T. Ishigaki, T. Kamiyama, A. Moriai, T. Otomo, K. Suzuya, J. Suzuki, K. Aizawa, N. Torikai, S. Itoh, K. Nakajima, K. Shibata, K. Yoshida, K. Oikawa, S. Torii, D. Yamazaki, M. Furusaka, N. Watanabe, M. Teshigawara, M. Harada, T. Kai, F. Maekawa, H. Takada, C. Konno, M. Kaminaga, R. Hino, and Y. Ikeda.
Notes
1. M. Harada et al., Optimization of poisoned and unpoisoned decoupled moderators in JSNS. Proc of ICANS-XVI, Düssel-dorf-Neuss, Germany, May 12–15, 2003, to be published
3. M. Arai and S. Itoh, eds., High-Performance Instruments in Neutron Arena of JHF, KEK Report 99–12 (2000)
4. T. Otomo, K. Nakajima and M. Arai, eds., Report on Neutron Instruments for JoinT Project, JKJ, KEK Report 2001–22 (2002)