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First Experimental Demonstration of Beam Storage by a Three-Dimensional Spiral Injection Scheme for Ultracompact Storage Rings

R. Matsushita1,*, H. Iinuma2,†, S. Ohsawa3, H. Nakayama3, K. Furukawa3, S. Ogawa3, N. Saito1,3, T. Mibe1,3, and M. A. Rehman4,‡

  • *Contact author: matsur@post.kek.jp
  • †Contact author: hiromi.iinuma.spin@vc.ibaraki.ac.jp
  • ‡Present address: China Spallation Neutron Source Science Center, Dongguan 523803, China and Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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Phys. Rev. Lett. 137, 025002 – Published 10 July, 2026

DOI: https://doi.org/10.1103/8nxx-srgz

Abstract

Three-dimensional spiral injection enables beam storage in ultracompact rings with nanosecond revolution periods. We report first storage of a 297  keV/c electron beam in a 22 cm weak-focusing ring with a 4.7 ns revolution period using a 140 ns kicker pulse. A scintillating-fiber detector observes signals >5σ above noise for ≥1  μs, and varying the weak-focusing field potential shifts the stored-beam region, consistent with Monte Carlo predictions, validating beam storage. This proof-of-principle opens a path to ultracompact storage rings for next-generation precision measurements including short-lived particles.

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References (29)

  1. C. Bernardini, G. F. Corazza, G. Di Giugno, J. Haissinski, P. Marin, R. Querzoli, and B. Touschek, Nuovo Cimento (1955–1965) 34, 1473 (1964).
  2. G. I. Budker, N. A. Kushnirenko, A. A. Naumov, A. P. Onuchin, S. G. Popov, V. A. Sidorov, A. N. Skrinskii, and G. M. Tumaikin, Sov. At. Energy 19, 1467 (1965).
  3. G. K. O’Neill, in 2nd International Conference on High-Energy Accelerators (JACoW Publishing, Geneva, Switzerland, 1959), pp. 23–25.
  4. K. Harada, Y. Kobayashi, T. Miyajima, and S. Nagahashi, Phys. Rev. ST Accel. Beams 10, 123501 (2007).
  5. H. Takaki, N. Nakamura, Y. Kobayashi, K. Harada, T. Miyajima, A. Ueda, S. Nagahashi, M. Shimada, T. Obina, and T. Honda, Phys. Rev. ST Accel. Beams 13, 020705 (2010).
  6. H. Rast, T. Atkinson, M. Dirsat, O. Dressler, and P. Kuske, in Proceedings of 2nd International Particle Accelerator Conference (IPAC’11) (JACoW, San Sebastián, Spain, 2011), pp. 3394–3396, paper THPO024.
  7. S. Henderson, in Proceedings of 6th International Particle Accelerator Conference (IPAC’15), Richmond, VA, USA, May 3-8, 2015, International Particle Accelerator Conference No. 6 (JACoW, Geneva, Switzerland, 2015), pp. 1791–1793.
  8. M. Aiba, M. Böge, F. Marcellini, A. Saá Hernández, and A. Streun, Phys. Rev. ST Accel. Beams 18, 020701 (2015).
  9. J. J. Bzura, T. J. Fessenden, H. H. Fleischmann, D. A. Phelps, A. C. Smith, and D. M. Woodall, Phys. Rev. Lett. 29, 256 (1972).
  10. S. M. Brewer, N. D. Guise, and J. N. Tan, Phys. Rev. A 88, 063403 (2013).
  11. A. Deller, J. von der Linden, S. Nißl, K. Michishio, N. Oshima, H. Higaki, and E. V. Stenson, Phys. Rev. E 110, L023201 (2024).
  12. M. M. Haque, H. Yamada, A. Moon, and N. Miura, Infrared Phys. Technol. 53, 231 (2010).
  13. T. Naito, H. Hayano, M. Kuriki, N. Terunuma, and J. Urakawa, Nucl. Instrum. Methods Phys. Res., Sect. A 571, 599 (2007).
  14. H. Iinuma, H. Nakayama, K. Oide, K. Sasaki, N. Saito, T. Mibe, and M. Abe, Nucl. Instrum. Methods Phys. Res., Sect. A 832, 51 (2016).
  15. R. R. Wilson, Phys. Rev. 53, 408 (1938).
  16. D. W. Kerst, Phys. Rev. 58, 841 (1940).
  17. M. Abe et al., Prog. Theor. Exp. Phys. 2019, 053C02 (2019).
  18. T. Hu, Nucl. Part. Phys. Proc. 346, 40 (2024).
  19. M. A. Rehman, A validation study on the novel three-dimensional spiral injection scheme with the electron beam for Muon g−2/EDM Experiment, Ph.D. thesis, SOKENDAI (The Graduate University for Advanced Studies), 2020.
  20. T. Sugimura, S. Ohsawa, and M. Ikeda, J. Synchrotron Radiat. 15, 258 (2008).
  21. R. Matsushita, M. Abe, H. Hirayama, K. Furukawa, H. Iinuma, T. Mibe, H. Nakayama, K. Oda, S. Ohsawa, M. Rehman, N. Saito, K. Sasaki, Y. Sato, M. Sugita, and T. Takayanagi, in Proceedings of IPAC’21, International Particle Accelerator Conference No. 12 (JACoW Publishing, Geneva, Switzerland, 2021), pp. 809–812.
  22. H. Iinuma, R. Matsushita, M. A. Rehman, H. Nakayama, S. Ohsawa, and K. Furukawa, arXiv:2602.05518.
  23. M. A. Rehman, H. Iinuma, S. Ohsawa, H. Nakayama, H. Hisamatsu, K. Furukawa, and T. Mibe, in Proceedings of 29th Linear Accelerator Conf. (LINAC’18), Beijing, China, Sep. 16–21, 2018 (JACoW Publishing, Geneva, Switzerland, 2018), pp. 717–720, paper THPO017.
  24. R. Matsushita, H. Iinuma, K. Oda, S. Ohsawa, H. Nakayama, M. A. Rehman, K. Furukawa, N. Saito, T. Mibe, and S. Ogawa, J. Phys. Conf. Ser. 2687, 022035 (2024).

  25. The electron CSDA range is obtained from the NIST ESTAR database [26], assuming polystyrene as a material for the scintillating fiber.

  26. M. J. Berger, J. S. Coursey, M. A. Zucker, and J. Chang, ESTAR, PSTAR, and ASTAR: Computer Programs for Calculating Stopping-Power and Range Tables for Electrons, Protons, and Helium Ions (version 1.2.3) (2005), National Institute of Standards and Technology, Gaithersburg, MD, online database, accessed 2026-01-06, http://physics.nist.gov/Star.
  27. Dassault Systèmes, Opera-3d (simulia), https://www.3ds.com/products/simulia/opera (2026), accessed: 2026-02-03.
  28. H. Iinuma, S. Ogawa, M. Otani, K. Sasaki, M. Abe, T. Mibe, and T. Yamanaka, in Proceedings of IPAC’25, Taipei, Taiwan (JACoW Publishing, Geneva, Switzerland, 2025), pp. 2020–2023, paper WEPM029.
  29. S. Ogawa, K. Sasaki, M. Otani, M. Abe, T. Mibe, H. Iinuma, T. Yamanaka, and T. Takayanagi, in Proceedings of IPAC’25, Taipei, Taiwan (JACoW Publishing, Geneva, Switzerland, 2025), pp. 2101–2104, paper WEPM055.

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Phys. Rev. Lett. 137, 025002– Published 10 July, 2026
  • Received 17 February 2026
  • Accepted 21 May 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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