- Physical Review Journals
All JournalsPhysics Magazine

Physical Review Accelerators and Beams

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Export citation

Export citation

Choose format for download:

Download Citation
  • Open Access

Ceramic vacuum chamber with a strip-patterned metallic coating to suppress eddy currents for beam injection in next-generation light sources

M. Tajima1,*, K. Fukami1,2, M. Masaki1, T. Ohshima1,2, M. Shoji1,2, S. Takano1,2, K. Tamura1,2, T. Taniuchi1, and H. Tanaka2

  • *Contact author: minori.tajima@spring8.or.jp
PDF

Phys. Rev. Accel. Beams 29, 074601 – Published 9 July, 2026

DOI: https://doi.org/10.1103/vml2-pycy

Abstract

Transparent top-up injection is important for maintaining photon beam stability and brightness in next-generation light sources. In traditional off-axis injection based on pulsed orbit bumps employing dipole kicker magnets, the injection transparency relies on the precise matching of magnetic fields to ensure a closed local orbit bump throughout the pulse duration. Similarly, alternative off-axis injection based on nonlinear kickers necessitates rigorous control of the magnetic field near the stored beam orbit. A key challenge common to both is mitigating the distortion of the pulsed kicker magnetic field caused by eddy currents in the metallic coating of the ceramic vacuum chamber, while simultaneously minimizing beam coupling impedance and heat load. This paper addresses this issue through the design of a ceramic vacuum chamber aimed at next-generation light sources, tailored to the requirements of the SPring-8 upgrade, SPring-8-II. We prototyped a ceramic vacuum chamber equipped with a strip-patterned titanium coating on its inner surface. Experimental characterization demonstrated that field deviations caused by eddy currents in the coating can be reduced to approximately 0.1% of the peak value throughout a pulse duration as short as 4  μs. These results satisfy the design requirements for beam injection in SPring-8-II.

View figure in article

Physics Subject Headings (PhySH)

Article Text

References (21)

  1. P. Raimondi, N. Carmignani, L. R. Carver, J. Chavanne, L. Farvacque, G. Le Bec, D. Martin, S. M. Liuzzo, T. Perron, and S. White, Commissioning of the hybrid multibend achromat lattice at the European Synchrotron Radiation Facility, Phys. Rev. Accel. Beams 24, 110701 (2021).
  2. T. E. Fornek, Advanced photon source upgrade project final design report, Technical Report, Argonne National Laboratory (ANL), Argonne, IL (United States), 2019.
  3. H. Tanaka et al., Green upgrading of SPring-8 to produce stable, ultrabrilliant hard X-ray beams, J. Synchrotron Radiat. 31, 1420 (2024).
  4. C. G. Schroer, I. Agapov, W. Brefeld, R. Brinkmann, Y.-C. Chae, H.-C. Chao, M. Eriksson, J. Keil, X. N. Gavaldà, R. Röhlsberger, O. H. Seeck, M. Sprung, M. Tischer, R. Wanzenberg, and E. Weckert, PETRA IV: The ultralow-emittance source project at DESY, J. Synchrotron Radiat. 25, 1277 (2018).
  5. T. Atkinson, M. Dirsat, O. Dressler, P. Kuske, and H. Rast, Development of a non-linear kicker system to facilitate a new injection scheme for the BESSY II storage ring, in Proceedings of the 2nd International Particle Accelerator Conference, (JACoW Publishing, Geneva, Switzerland, 2011), pp. 3394–3396.
  6. P. Alexandre, R. B. E. Fekih, A. Letrésor, S. Thoraud, J. S. Castro, F. Bouvet, J. Breunlin, and P. F. Tavares, Transparent top-up injection into a fourth-generation storage ring, Nucl. Instrum. Methods Phys. Res., Sect. A 986, 164739 (2021).
  7. L. Liu, M. B. Alves, F. C. Arroyo, G. O. Brunheira, G. R. Cruz, A. F. Giachero, A. C. S. Oliveira, F. S. de Oliveira, G. S. Ramirez, X. R. Resende, E. N. Rolim, F. H. de Sá, D. O. Tavares, and H. Westfahl Jr., Status of SIRIUS operation with users, in Proceedings of the 14th International Particle Accelerator Conference (JACoW Publishing, Geneva, Switzerland, 2023), pp. 2586–2589.
  8. R. Ollier, P. Alexandre, R. B. E. Fekih, A. Gamelin, N. Hubert, M. Labat, L. S. Nadolski, and M.-A. Tordeux, Toward transparent injection with a multipole injection kicker in a storage ring, Phys. Rev. Accel. Beams 26, 020101 (2023).
  9. S. Takano, K. Fukami, C. Kondo, M. Masaki, M. Oishi, M. Shoji, K. Tamura, T. Taniuchi, T. Watanabe, K. Yanagida, H. Akikawa, K. Sato, T. Hara, T. Inagaki, H. Tanaka, K. Hamato, J. Kataoka, K. Kusano, K. Ogata, and Y. Saito, Renovation of off-axis beam injection scheme for next-generation photon sources, in Proceedings of the 10th International Particle Accelerator Conference (JACoW Publishing, Geneva, Switzerland, 2019), pp. 2318–2321.
  10. T. Hara et al., Low-emittance beam injection for a synchrotron radiation source using an X-ray free-electron laser linear accelerator, Phys. Rev. Accel. Beams 24, 110702 (2021).
  11. H. Tanaka et al., Stable top-up operation at SPring-8, J. Synchrotron Rad. 13, 378 (2006).
  12. K. Fukami, T. Inagaki, T. Iwashita, H. Nakanishi, N. Nishimori, S. Takano, Y. Takemura, T. Taniuchi, T. Watanabe, H. Yamaguchi, and H. Tanaka, Iron lamination and interlaminar insulation for high-frequency pulsed magnets, Rev. Sci. Instrum. 93, 023301 (2022).
  13. T. Inagaki, H. Tanaka, H. Akikawa, K. Sato, K. Fukami, C. Kondo, and S. Takano, Development of a solid-state pulse generator driving kicker magnets for a novel injection system of a low emittance storage ring, in Proceedings of the 9th International Particle Accelerator Conference (JACoW Publishing, Geneva, Switzerland, 2018), pp. 1804–1807).
  14. L. Walling, D. Neuffer, H. A. Thiessen, and G. Spalek, Transmission-line impedance measurements of beam pipes for an advanced hadron facility, in Proceedings of the IEEE Particle Accelerator Conference (1987), pp. 1164–1166, https://proceedings.jacow.org/p87/PDF/PAC1987_1164.PDF.
  15. J. E. Milburn, M. Yoon, and Y. S. Kim, Patterned metallic coating of a ceramic chamber in storage ring bump magnets, IEEE. Trans. Nucl. Sci. 47, 2715 (2000).
  16. C. Mitsuda, H. Takaki, R. Takai, T. Nogami, T. Uchiyama, Y. Kobayashi, T. Obina, Y. Lu, and A. Yokoyama, Suppression of eddy-current effects in beam injection using a pulsed sextupole magnet with a new ceramic chamber, Phys. Rev. Accel. Beams 25, 112401 (2022).
  17. Z. Chen, P. Tian, Y. Yang, Y. Ma, X. Peng, G. Wu, S. Yue, J. Chen, N. Wang, and P. He, Development of ceramic vacuum chamber for collider ring kicker of circular electron positron collider (CEPC), Vacuum 214, 112247 (2023).
  18. R. Nagaoka and K. L. F. Bane, Collective effects in a diffraction-limited storage ring, J. Synchrotron Radiat. 21, 937 (2014).
  19. Dassault Systèmes, CST studio suite, https://www.3ds.com/products/simulia/cst-studio-suite.
  20. A. Khan, G. Bassi, B. Kosciuk, R. Todd, V. Smaluk, B. Bacha, P. Palecek, and C. Hetzel, Simulation and measurement of beam-induced heating of ceramic vacuum chambers, Phys. Rev. Accel. Beams 27, 084501 (2024).
  21. JTEC Corporation, https://www.j-tec.co.jp/english/.

Outline

Information

Phys. Rev. Accel. Beams 29, 074601– Published 9 July, 2026
  • Received 11 January 2026
  • Accepted 29 May 2026
Crossmark - Check for updates button
Creative Commons Logo

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.

Published by the American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation