1. Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1 Tenjincho, Kiryu, Gunma 376
2. Department of Physics, Faculty of Science, Okayama University, 3-1-1 Tsushima-naka, Okayama, Okayama 700
3. Faculty of Science, Himeji Institute of Technology, 1479-1 Kanaji, Kamigori, Ako-gun, Hyogo 678-12
4. Section of Special Project, Tokin Corporation, 6-7-1 Kohriyama, Taihaku, Sendai 982
5. Photon Factory, National Laboratory for High Energy Physics, 1-1 Oho, Tsukuba, Ibaraki 305