1. High-intensity Proton Accelerator Project Team: JAERI Report No. JAERI-Tech 2003-044
2. High-intensity Proton Accelerator Project Team: KEK Report No. 2002-13.
3. Sugai I., Takeda Y., Oyaizu M., Kawakami H., Irie Y., Arakida Y., Hara K., Hattori H., Kawasaki K., Kamiya J., Kinsho M., Nucl. Instrum. Methods Phys. Res., Sect. A 561,16-23 (2006).
4. Sugai I., Oyaizu M., and Takeda Y., JP2007545272A, 2005-11-15. (in Japanese)