1. Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
2. Department of Communications and Computer Engineering, Kyoto University, Kyoto, Japan
3. Photon Science Center, University of Tokyo, Bunkyo, Japan
4. Socionext Inc., Kawasaki, Japan
5. High-Reliability Engineering and Components Corporation (HIREC), Tsukuba, Japan
6. Hitachi Ltd., Yokohama, Japan
7. Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, Japan
8. Faculty of Engineering Sciences, Kyushu University, Kasuga, Japan