1. National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1, Higashi, Tsukuba, Ibaraki 305-8565, Japan
2. Hitachi Ltd., 2520 Akanuma, Hatoyama, Saitama 350-0395, Japan
3. High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
4. Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa 228-8555, Japan
5. Mitsui Engineering and Shipbuilding Co., Ltd., 1 Yawatakaigandori, Ichihara, Chiba 290-8531, Japan