RIKEN Nishina Center for Accelerator-Based Science Instrumentation Development Group

Director: Tetsuya Ohnishi (Ph. D.)

Japanese Page

Research Summary

This group develops core experimental instrumentations for the RI Beam factory, which consists of unique instrumentations. The SCRIT (Self-Confining RI Ion Target) and the R3 (Rare-RI Ring) are provide storage ring experiments for specific purpose and their operation have been already started. All are designed to maximize the research potential of the world's most intense RI beams, Beam-manipulation techniques, such as a beam accumulation and a beam cooling, will be able to provide opportunities of new experimental challenge and the foundation for future development of RIBF. For the future, we are also developing an ion storage ring for nuclear reaction experiments with unstable nuclei.

Main Research Fields

Mathematical & Physical Sciences

Related Research Fields

Engineering
Interdisciplinary Science & Engineering

Keywords

Accelerator science
Nuclear physics
Electron scattering
Nuclear mass measuremnet
Storage ring

Selected Publications

1. K. Tsukada, Y. Abe, A. Enokizono, T. Goke, M. Hara, Y. Honda, T. Hori, S. Ichikawa, Y. Ito, K. Kurita, C. Legris, Y. Maehara, T. Ohnishi, R. Ogawara, T. Suda, T. Tamae, M. Wakasugi, M. Watanabe, and H. Wauke.
"First observation of electron scattering from online-produced radioactive target"
Phys. Rev. Letters 131, 092502 (2023).
2. S. Naimi, Y. Yamaguchi, T. Yamaguchi, A. Ozawa.
"Recent achievements at the Rare-RI Ring, a unique mass spectrometer at the RIBF/RIKEN"
European Physical Journal A, 59:90 (2023)
3. R. Ogawara, Y. Abe, T. Ohnishi, A. Enokizono, M. Hara, T. Hori, S. Ichikawa, K. Kurita, Y. Maehara, T. Suda, K. Tsukada, M. Wakasugi, M. Watanabe, H. Wauke.
"Ion-trapping properties of SCRIT: Time evolutions of 138Ba charge state distributions"
Nuclear Instrumentation and Methods in Physics Research Section B 541, 90 (2023).
4. T. Ohnishi, D. Abe, Y. Abe, R. Danjyo, A. Enokizono, T. Goke, M. Hara, Y. Honda,T. Hori, S. Ichikawa, S. Iimura, Y. Ishikura, K. Ishizaki, Y. Ito, K. Kurita, C. Legris,Y. Maehara, Y. Nagano, R. Obara, R. Ogawara, T. Suda, T. Tamae, K. Tsukada, M. Wakasugi, M. Watanabe, H. Wauke, T. Yamano, S. Yoshida.
"The SCRIT electron scattering facility at RIKEN RI Beam Factory."
Nuclear Instrumentation and Methods in Physics Research Section B 541, 380 (2023).
5. H. F. Li, S. Naimi, T. M. Sprouse, M. R. Mumpower, Y. Abe, Y. Yamaguchi, D. Nagae, F. Suzaki, M. Wakasugi, H. Arakawa, W. B. Dou, D. Hamakawa, S. Hosoi, Y. Inada, D. Kajiki, T. Kobayashi, M. Sakaue, Y. Yokoda, T. Yamaguchi, R. Kagesawa, D. Kamioka, T. Moriguchi, M. Mukai, A. Ozawa, S. Ota, N. Kitamura, S. Masuoka, S. Michimasa, H. Baba, N. Fukuda, Y. Shimizu, H. Suzuki, H. Takeda, D. S. Ahn, M. Wang, C. Y. Fu, Q. Wang, S. Suzuki, Z. Ge, Yu. A. Litvinov, G. Lorusso, P. M. Walker, Zs. Podolyak and T. Uesaka.
"First Application of Mass Measurements with the Rare-RI Ring Reveals the Solar r-process Abundance Trend at A = 122 and A = 123"
Physical Review Letters 128, 152701 (2022).
6. K. Tsukada, A. Enokizono, T. Ohnishi, K. Adachi, T. Fujita, M. Hara, M. Hori, T. Hori, S. Ichikawa, K. Kurita, K. Matsuda, T. Suda, T. Tamae, M. Togasaki, M. Wakasugi, M. Watanabe, and K. Yamada.
"First Elastic Electron Scattering from 132Xe at the SCRIT Facility"
Physical Review Letters 118, 262501 (2017).
7. M. Wakasugi, T. Ohnishi, S. Wang, Y. Miyashita, T. Adachi, T. Amagai, A. Enokizono, A. Enomoto, Y. Haraguchi, M. Hara, T. Hori, S. Ichikawa, T. Kikuchi, R. Kitazawa, K. Koizumi, K. Kurita, T. Miyamoto, R. Ogawara, Y. Shimakura, H. Takehara, T. Tamae, S. Tamaki, M. Togasaki, T. Yamaguchi, K. Yanagi, and T. Suda.
"Construction of the SCRIT electron scattering facility at the RIKEN RI Beam Factory"
Nuclear Instruments and Methods in Physics Research Section B 317, 668 (2013).
8.Y. Yamaguchi, M. Wakasugi, T. Uesaka, A. Ozawa, Y. Abe, T. Fujinawa, M. Kase, M. Komiyama, T. Kubo, K. Kumagai, T. Maie, D. Nagae, J. Ohnishi, F. Suzaki, A. Tokuchi, Y. Watanabe, K. Yoshida, K. Yamada, T. Yamaguchi, H. Yamasawa, Y. Yanagisawa, J. Zenihiro, Y. Yano.
Construction of rare-RI ring at RIKEN RI Beam Factory"
Nuclear Instrumentation and Methods in Physics Research B 317, 629 (2013).
9. A. Ozawa, T. Uesaka and M. Wakasugi, the Rare-RI Ring Collaboration.
"The rare-RI ring"
Progress of Theoretical and Experimental Physics 03C009 (2012).

Lab Members

Principal investigator

Tetsuya Ohnishi: Director

Core members

Masamitsu Watanabe: Senior Research Scientist
Yoshitaka Yamaguchi: Technical Scientist
Yasushi Abe: Contract Researcher
Asahi Yano: Junior Research Associate

Contact Information

2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: oonishi [at] ribf.riken.jp