TY - JOUR
T1 - Development of longitudinal-gradient magnet for time focusing of ultra-cold neutron with anisotropic inter-pole
AU - Arimoto, Yasushi
AU - Iwashita, Yoshihisa
AU - Yoshioka, Tamaki
AU - Kitaguchi, Masaaki
AU - Imajo, Sohei
AU - Shimizu, Hirohiko M.
AU - Asahi, Koichiro
AU - Ino, Takashi
AU - Kamiya, Yoshio
AU - Mishima, Kenji
AU - Muto, Suguru
AU - Sakai, Kenji
AU - Shima, Tatsushi
AU - Taketani, Kaoru
AU - Yamashita, Satoru
AU - Yoshimi, Akihiro
N1 - Funding Information:
Manuscript received September 13, 2011; accepted January 01, 2012. Date of publication February 23, 2012; date of current version May 24, 2012. This work was supported by the Quantum Beam Fundamentals Development Program, MEXT. This work was also supported by KEK Neutron Program Number 2009S03. Y. Arimoto, H. M. Shimizu, T. Ino, K. Mishima, S. Muto, and K. Take-tani are with the Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan (e-mail: yasushi.ari-moto@kek.jp). Y. Iwashita is with the Institute for Chemical Research, Kyoto University, Kyoto 611-0011, Japan. T. Yoshioka was with the High Energy Accelerator Research Organization Tsukuba 305-0801, Japan. He is now with the Department of Physics, Kyushu University, Fukuoka 812-8581, Japan. M. Kitaguchi is with Kyoto University Research Reactor Institute, Osaka 590-0494, Japan. S. Imajo is with the Department of Physics, Kyoto University, Kyoto 606-8502, Japan. K. Asahi is with the Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan. Y. Kamiya and S. Yamashita are with the International Center for Elementary Particle Physics, University of Tokyo, Tokyo 113-0033, Japan. K. Sakai is with the Japan Atomic Energy Agency, Tokai 319-1195, Japan. T. Shima is with the Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan. A. Yoshimi was with the RIKEN Nishina Center for Accelerator-Based Science, Wako 351-0198, Japan. He is now with the Research Core for Extreme Quantum World, Okayama University, Okayama 700-8530, Japan. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2012.2183569
PY - 2012
Y1 - 2012
N2 - Ultra-cold neutron (UCN) is attractive for a search of the neutron electric dipole moment (nEDM). It is crucial to store UCNs with high density in a bottle for nEDM measurement apparatus. To increase the density, time focusing technique can be useful, where slow neutrons are accelerated and fast neutrons are decelerated by using magnetic potential. This device is called rebuncher. The rebuncher consists of a gradient magnet, RF coil, and neutron guide. The magnet generates a field gradient of 3.5 T/m (from 1 T to 0.2 T within 24 cm) in the longitudinal direction. By using anisotropic inter-poles, the magnet is compact and keeps the gradient uniform. The fabricated magnet showed good performance as designed.
AB - Ultra-cold neutron (UCN) is attractive for a search of the neutron electric dipole moment (nEDM). It is crucial to store UCNs with high density in a bottle for nEDM measurement apparatus. To increase the density, time focusing technique can be useful, where slow neutrons are accelerated and fast neutrons are decelerated by using magnetic potential. This device is called rebuncher. The rebuncher consists of a gradient magnet, RF coil, and neutron guide. The magnet generates a field gradient of 3.5 T/m (from 1 T to 0.2 T within 24 cm) in the longitudinal direction. By using anisotropic inter-poles, the magnet is compact and keeps the gradient uniform. The fabricated magnet showed good performance as designed.
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U2 - 10.1109/TASC.2012.2183569
DO - 10.1109/TASC.2012.2183569
M3 - Article
AN - SCOPUS:84862510957
SN - 1051-8223
VL - 22
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 6156745
ER -