1. Research Institute of Applied Sciences, Kyoto 606-8202, Japan
2. Department of Engineering, Daido University, Nagoya 457-8530, Japan
3. JASRI, 1-1-1 Kouto, Sayo-cho, Hyougo 679-5198, Japan
4. J-PARC Center, 2-4 Shirane Shirakata, Tokai-mura, Ibaraki 319-1195, Japan
5. SuperPower Inc., 450 Duane Ave., Schenectady, New York 12304, USA
6. Advanced Technology Laboratory, Fujikura Ltd., 1440, Mutsuzaki, Sakura-shi, Chiba 285-8550, Japan
7. Department of Physics, University of Durham, Durham DH1 3LE, UK