RIKEN Nishina Center for Accelerator-Based ScienceAccelerator Group

Group Director: Osamu Kamigaito (D.Sc.)

Japanese Page

Research Summary

The accelerator group is pursuing various upgrade programs of the world-leading heavy-ion accelerator facility, RI-Beam Factory (RIBF), to enhance the accelerator performance and operation efficiency. We are also promoting developments of the RIBF for applications to a variety of research fields.

Main Research Fields

Engineering

Related Research Fields

Mathematical & Physical Sciences

Keywords

High-intensity heavy-ion beam
Cyclotron
Ion source
Superconducting rf cavities
Accelerator science

Selected Publications

1. T. Nishi, T. Watanabe, T. Adachi, R. Koyama, K. Yamada, N. Sakamoto, O. Kamigaito:
"Nondestructive beam envelope measurements using beam position monitors for low-beta heavy ion beams in a superconducting linear accelerator"
Phys. Rev. Accel. Beams 28, 092803 (2025).
2. O. Kamigaito:
"High-beam-power operations at heavy-ion facilities: technical developments, challenges, and resolutions"
Proceedings of the 16th International Particle Accelerator Conference (IPAC2025), Taipei, Taiwan, MOXP2, (2025).
3. H. Imao:
"Status update of the Charge Stripper Rings project"
JINST 18 P03028 (2023).
4. H. Imao:
"Charge Stripper Ring for RIKEN RI Beam Factory"
JINST 15 P12036 (2020).
5. O. Kamigaito, K. Ozeki, N. Sakamoto, K. Suda, K. Yamada:
"Measurement of mechanical vibration of SRILAC cavities"
Proceedings of the 19th International Conference on RF Superconductivity (SRF2019), Dresden, Germany, TUP042, p. 515 (2019).
6. H. Okuno, N. Fukunishi, O. Kamigaito:
"Progress of RIBF accelerators"
Progress of Theoretical and Experimental Physics, 03C002. (2012).
7. M. Kase, M. Fujimaki, Y. Higurashi, E. Ikezawa, O. Kamigaito, M. Komiyama, T. Nakagawa, K. Ozeki, N. Sakamoto, K. Suda:
"Heavy-ion beam acceleration at RIKEN for the super-heavy element search"
Proceedings of the 3rd International Particle Accelerator Conference (IPAC2012), New Orleans, USA, THPPP040, p. 3823 (2012).
8. A. Goto:
"Review of high power cyclotrons for heavy ion beams"
Proceedings of the 19th International Conference on Cyclotrons and their Applications (CYC2010), Lanzhou, China, MOM2CIO01, p. 9 (2010).
9. Y. Yano:
"The RIKEN RI Beam Factory Project: A status report"
Nucl. Instrum. Methods B 261, 1009 (2007).
10. O. Kamigaito:
"Circuit-model representation of external-Q calculation"
Phys. Rev. ST Accel. Beams 9, 062003 (2006).

Events

HIAT2015

Lab Members

Principal investigator

Osamu Kamigaito: Group Director

Core members

Nobuhisa Fukunishi: Deputy Group Director
Hiroki Okuno: Deputy Group Director
Takahide Nakagawa: Senior Visiting Scientist

Careers

Position	Deadline
Seeking a few Research Scientists, Senior Research Scientists, Technical Scientists or Senior Technical Scientists (25-1598)	Nov. 24, 2025
Seeking Postdoctoral Researcher, Research & Development Scientist or Technical Staff I (25-1325)	Open until filled

Contact Information

204 Nishina LINAC Laboratory,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: kamigait@riken.jp

Organization

Accelerator R&D Team: Hiroki Okuno (D.Sc.)
Ion Source Team: Osamu Kamigaito (D.Sc.)
RILAC Team: Yoshihide Higurashi (D.Sc.)
Cyclotron Team: Naruhiko Sakamoto (D.Sc.)
Beam Dynamics and Diagnostics Team: Nobuhisa Fukunishi (D.Sc.)
Cryogenic Technology Team: Hiroki Okuno (D.Sc.)
Infrastructure Management Team: Masanori Kidera (D.Sc.)