1. National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
2. RIKEN Center for Advanced Photonics, Neutron Beam Technology Team, RIKEN, Wako, Saitama 351-0198, Japan
3. InXite, Inc., Tsukba, Ibaraki 305-0047, Japan
4. Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
5. Institute of Material Structure Science, High Energy Accelerator Research Organization (KEK), Tokai, Ibaraki 319-1106, Japan
6. Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan