RIKEN Nishina Center for Accelerator-Based Science RILAC Team

Team Leader: Yoshihide Higurashi (D.Sc.)

Japanese Page

Research Summary

Our team is responsible for the operation, maintenance, and upgrade of the RIKEN heavy-ion linear accelerator (RILAC), a unique variable-frequency linac that has been in operation since 1980. RILAC was upgraded in the 1990s as part of the RI Beam Factory (RIBF) project, and made a significant contribution to the synthesis and discovery of the element 113, nihonium. In 2019, a superconducting linac booster, SRILAC, was installed, and it will play a major role in the synthesis of heavier new elements, development of the technologies for production of medical radioisotopes, and as a powerful injector to RIBF.

Main Research Fields

Interdisciplinary Science & Engineering

Related Research Fields

Mathematical & Physical Sciences
Quantum beam science
Particle/Nuclear/Cosmic ray/Astro physics
Dynamics/Control

Keywords

Heavy ion beam
Radio-frequency linear accelerator
Superconducting rf cavities
Radioisotope
High vacuum devices

Selected Publications

1. T.Nishi, M. Fujimaki, N. Fukunishi, H. Imao, O. Kamigaito, T. Nagatomo, N. Sakamoto, A. Uchiyama, T. Watanabe, Y. Watanabe, K. Yamada:
"Beam Acceleration with the Upgraded RIKEN Heavy-Ion Linac"
64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High-Brightness Hadron Beams (HB2021), Illinois, USA (2021).
2. T. Nishi, E. Iwai, A. Uchiyama, Y. Shimizu, T. Sugimoto, H. Suzuki, H. Takeda, N. Fukuda, N. Fukunishi, H. Fujii, H. Maesaka, M. Yoshimoto:
"Development of Auto Tuning System of Ion Optics for High Intensity Primary Beam Using Machine Learning"
Proceedings of the 18th Annual Meeting of Particle Accelerator Society of Japan, TUOA03 (2021).
3. T. Nishi, A. Uchiyama, O. Kamigaito, N. Sakamoto, T. Nagatomo, N. Fukunishi, M. Fujimaki, T. Watanabe, Y. Watanabe:
"Emittance Measurement and Ion Optics Tuning for SRILAC Beamline"
Proceedings of the 17th Annual Meeting of Particle Accelerator Society of Japan, THOO08 (2020).
4. N. Sakamoto, M. Fujimaki, E. Ikezawa, H. Imao, O. Kamigaito, T. Nagatomo, T. Nishi, K. Ozeki, K. Suda, A. Uchiyama, T. Watanabe, Y. Watanabe, K. Yamada:
"Commissioning of Superconducting-Linac Booster for RIKEN Heavy-Ion Linac"
Proceedings of the 17th Annual Meeting of Particle Accelerator Society of Japan, FRPP05 (2020).
5. K. Oyamada, E. Ikezawa, T. Ohki, H. Yamauchi, M. Tamura, A. Yusa, K. Kaneko, H. Imao, A. Uchiyama, K. Ozeki, T. Nishi, N. Sakamoto, K. Suda, T. Nagatomo, M. Fujimaki, K. Yamada, T. Watanabe, Y. Watanabe, O. Kamigaito:
"Present Status of RILAC"
Proceedings of the 17th Annual Meeting of Particle Accelerator Society of Japan, FRSP06 (2020).
6. O. Kamigaito:
"Commissioning of Superconducting Linac Booster for Heavy-Ion Linac at RIKEN"
30th International Linear Accelerator Conference (LINAC2020), Liverpool, UK, (2020).
7. 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, pp. 513-517 (2019).
8. Y. Watanabe, M. Kase, E. Ikezawa, N. Fukunishi, M. Fujimaki, O. Kamigaito, M. Komiyama, K. Kumagai, T. Maie, K. Yamada, K. Suda, K. Ozeki, N. Sakamoto, A. Uchiyama, T. Watanabe, H. Yamasawa, K. Morimoto, D. Kaji, K. Kaneko, M. Tamura, T. Ohki, K. Oyamada, H. Yamauchi, A. Yusa, S. Fukuzawa, M. Hamanaka, S. Ishikawa, K. Kobayashi, R. Koyama, T. Nakamura, M. Nishida, M. Nishimura, J. Shibata, N. Tsukiori, K. Yadomi:
"Transfer of GARIS-II and charge-state multiplier (CSM) cavities"
RIKEN Accel. Prog. Rep. 51, p. 132 (2018).
9. Y. Watanabe, M. Kase, M. Fujimaki, N. Fukunishi, E. Ikezawa, O. Kamigaito, K. Kumagai, T. Maie, J. Ohnishi, K. Ohzeki, H. Okuno, N. Sakamoto, K. Suda, S. Watanabe, K. Yamada, S. Fukuzawa, M. Hamanaka, S. Ishikawa, K. Kobayashi, R. Koyama, T. Nakamura, M. Nishida, M. Nishimura, J. Shibata, N. Tsukiori, K. Yadomi:
"RIKEN Ring Cyclotron"
Proceedings of the 13th International Conference on Heavy Ion Accelerator Technology (HIAT2015), Yokohama, Japan, pp. 54-57 (2015).
10. Y. Watanabe, E. Ikezawa, J. Ohnishi, K. Kumagai, M. Komiyama, T. Fujinawa, M. Fujimaki, T. Maie, H. Yamasawa, S. Yokouchi, T. Watanabe, H. Watanabe:
"Installation of a New Injector RILAC2 for RIKEN RIBF"
J. Particle Accelerator Society of Japan, Vol. 7, No. 4, pp. 285-293 (2010).

Lab Members

Principal investigator

Yoshihide Higurashi: Team Leader

Core members

Yutaka Watanabe: Senior Technical Scientist
Takahiro Nishi: Research Scientist

Contact Information

204 Nishina LINAC Laboratory,
2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: higurasi [at] riken.jp