Cyclotron Team

Together with other teams of Nishina Center accelerator division, maintaining and improving the RIBF cyclotron complex. The accelerator provides high intensity heavy ions. Our mission is to have stable operation of cyclotrons for high power beam operation. Recently stabilization of the rf system is a key issue to provide 10 kW heavy ion beam. Major Research Subjects are: (1) RF technology for Cyclotrons (2) Beam-RF correlation analysis (3) Operation of RIBF cyclotron complex. (4) Maintenance and improvement of RIBF cyclotrons. (5) Development of Superconducting rf cavity for rebuncher system (6) Single turn operation for polarized deuteron beams.

Research Subjects

• Development of rf system for cyclotrons.
• Operation technology of cyclotrons of RIBF.
• Maintenance and improvement of the cyclotrons in RIBF.
• Single-turn acceleration.
• Development of superconducting rf cavity for rebuncher system.

Publications

1. N. Sakamoto, M. Fujimaki, Y. Higurashi, H. Hasebe, O. Kamigaito, R. Koyama, H. Okuno, K. Suda, T. Watanabe, and K. Yamada:
   "Commissioning of a New Injector for the RIKEN RI-Beam Factory"
   Proc. The XXVI Linear Accelerator Conferenc, Tel Aviv, Israel(2012).
2. K. Suda, S. Arai, Y. Chiba, O. Kamigaito, M. Kase, H. Okuno, N. Sakamoto, Y. Watanabe, and K. Yamada:
   "Design of Coupler for Direct Coupled Amplifier to Drift Tube Linac Cavities of the Injector RILAC2 for RIBF"
   Proc. The XXVI Linear Accelerator Conferenc, Tel Aviv, Israel(2012).
3. L. Liu, O. Kamigaito, N. Sakamoto, K. Suda, and K. Yamada:
   "Design and simulation of a test model of Tri-Spoke Cavity"
   Proc. The XXVI Linear Accelerator Conferenc, Tel Aviv, Israel(2012).
4. N. Sakamoto, T. Dantsuka, T. Fujinawa, N. Fukunishi, H. Hasebe, Y. Higurashi, K. Ikegami, E. Ikezawa, H. Imao, T. Kageyama, O. Kamigaito, M. Kase, M. Kidera, M. Komiyama, H. Kuboki, K. Kumagai, T. Maie, M. Nagase, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, K. Suda, H. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, L. Liu, H. Yamasawa:
   "Operating Experience with Acceleration of High Intensity Heavy-ion beams in RIBF"
   Proc. The 9th Annual Meeting of Particle Accelerator Society Japan, Toyonaka(2012).
5. K. Sekiguchi, H. Okamura, N. Sakamoto, H. Suzuki, M. Dozono, Y. Maeda, T. Saito, S. Sakaguchi, H. Sakai, M. Sasano, Y. Shimizu, T. Wakasa, K. Yako, H. Witala, W. Glockle, J. Golak, H. Kamada, and A. Nogga:
   "Three Nucleon Force Effects in Intermediate Energy Deuteron Analyzing Powers for dp Elastic Scattering"
   Physical Review C (accepted).
6. K. Suda, M. Fujimaki, N. Fukunishi, H. Hemmi, O. Kamigaito, M. Kase, R. Koyama, K. Kumagai, N. Sakamoto, T. Watanabe, and K. Yamada:
   "Stable Operation of RF Systems for RIBF"
   Proc. the 19th International Conference on Cyclotrons and Their Applications, Lanzhou, China (2010).
7. N. Sakamoto, M. Fujimaki, A. Goto, O. Kamigaito, M. Kase, R. Koyama, K.Suda, K. Yamada, and S. Yokouchi:
   "Operating Experience with the RF System for Superconducting Ring Cyclotron of RIBF"
   Proc. the 19th International Conference on Cyclotrons and Their Applications, Lanzhou, China (2010).
8. N. Sakamoto,O. Kamigaito, S. Kohara, H. Okuno, M. Kase, A. Goto, and Y. Yano
   "RF system for the RIBF Superconducting Ring Cyclotron"
   Proc. the 18th International Conference on Cyclotrons and Their Applications, Giardini-Naxos, Italy (2007), p455.
9. R. Taki, H. Okamura, N. Fukunishi, H. Ryuto, N. Sakamoto, K. Sekiguchi, and A. Goto:
   "Response of a Germanium Detector to Energetic Heavy Ions"
   Nucl. Instrum. and Methods Phys. Res. A545 (2005) 269--272.
10. O. Kamigaito, M. Kase, N. Sakamoto, Y. Miyazawa, E. Ikezawa, N. Fukunishi, S. Kohara, M. Fujimaki, M. Hemmi, T. Chiba, Y. Chiba, H. Ryuto, A. Goto, and Y. Yano:
    "Construction of a booster linac for the RIKEN heavy-ion linac"
    Nucl. Instrum. and Methods Phys. Res. A545 (2005) 269--272.