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Chinese Physics C> 2016, Vol. 40> Issue(2) : 027002 DOI: 10.1088/1674-1137/40/2/027002

Study of a magnetic alloy-loaded cavity for compact synchrotrons

  • 1.

      Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 2.

      High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan

  • Magnetic alloy (MA)-loaded cavities have been widely used in compact proton and heavy-ion synchrotrons, and the MA core is the key issue in their development. Chinese-produced MA has never yet been adopted as core material for an MA-loaded cavity. To use Chinese-produced MA as the core material, it is necessary to study its properties, and compare with MA material produced elsewhere. In this paper, the properties of several MA cores made of Chinese-produced material are measured. Based on the measured results, a schematic design is produced for a cavity which could obtain 1 kV gap voltage with less than 1.5 kW power dissipation in the frequency range of 0.5-7 MHz. The difference between resonant frequencies obtained from simulation and analytical results is less than 10%.
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  • References

    [1] M. Bohnke, F. J. Etzkorn, R. Maier et al, Broadband Synchrotron Cavity for COSY with Minimum Size Based on VitroPerm, in Proceedings of PAC1999(New York, USA, 1999), p. 851
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    [3] M. Fujieda, Y. Iwashita, A. Noda et al. Phys. Rev. ST Accel. Beams, 2: 122001 (1999)
    [4] G. Hutter, P. Hulsmann, and W. Vinzenz, The Bunch Compressor System for SIS18 at GSI, in Proceedings of EPAC2004(Switzerland, 2004), p. 1165
    [5] M. Muto, S. Ninomiya, and M. Toda, Non-resonant Accelerating System at the KEK-PS Booster, in Proceedings of EPAC2004(Switzerland, 2004), p. 1027
    [6] R. Garoby, M. Haase, P. Maesen et al, The LEIR RF System, in Proceedings of PAC2005 (Knoxville, Tennessee, USA, 2005), p. 1619
    [7] F. Noda, F. Ebina, H. Nishiuchi et al, Conceptual Design of Carbon/proton Synchrotron for Particle Beam Therapy, in Proceedings of PAC2009(Vancouver, British Columbia, Canada, 2009), p. 1300
    [8] H. Nakayama, E. Ezura, M. Fujieda et al, A Measurement System using GP-IB for a Magnetic Core Test Cavity, in Proceedings of APAC1998(Tsukuba, Japan, 1998), p. 393
    [9] M. Fujieda, Y. Mori, H. Nakayama et al, Studies of Magnetic Cores for JHF Synchrotrons, in Proceedings of PAC1997(Vancouver, British Columbia, Canada, 1997), p. 2992
    [10] C. Ohmori, O. Araoka, E. Ezura et al, High Gradient Magnetic Alloy Cavities for J-PARC Upgrade, in Proceedings Of IPAC2011(Kursaal, San Sebastian, Spain, 2011), p. 2885
    [11] C. F. Xie and K. J. Rao, Electromagnetic Fields and Waves Second edition (Beijing: Higher Education Press, 1998), p. 64 (in Chinese)
    [12] P. Z. Ning and D. F. Min, Microwave Transmission Technology (Shanghai: Shanghai Scientific and Technical Publishers, 1985), p. 232 (in Chinese)
    [13] S. N. Fu et al, (Institute of High Energy Physics, CAS), The Design Report of Proton Synchrotron for Harbin Institute of Technology, 2012
    [14] K. Saito and J. I. Hirota, F. Noda, Nucl. Instrum. Methods. A, 402(efeq1): 1 (1998)
    [15] H. Shi and Y. Irie, Simulation of Magnetic Core-loaded Coaxial cavity, Internal report, 2014

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Hua Shi and Yoshiro Irie. Study of a magnetic alloy-loaded cavity for compact synchrotrons[J]. Chinese Physics C, 2016, 40(2): 027002. doi: 10.1088/1674-1137/40/2/027002
Hua Shi and Yoshiro Irie. Study of a magnetic alloy-loaded cavity for compact synchrotrons[J]. Chinese Physics C, 2016, 40(2): 027002.  doi: 10.1088/1674-1137/40/2/027002 shu
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Received: 2015-04-13
Revised: 2015-09-10
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    Supported by National Natural Science Foundation of China (11175194)

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Study of a magnetic alloy-loaded cavity for compact synchrotrons

    Corresponding author: Hua Shi,
  • 1.  Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2.  High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
  • Received Date: 2015-04-13
  • Accepted Date: 2015-09-10
  • Available Online: 2016-02-20
Fund Project:  Supported by National Natural Science Foundation of China (11175194)

Abstract: Magnetic alloy (MA)-loaded cavities have been widely used in compact proton and heavy-ion synchrotrons, and the MA core is the key issue in their development. Chinese-produced MA has never yet been adopted as core material for an MA-loaded cavity. To use Chinese-produced MA as the core material, it is necessary to study its properties, and compare with MA material produced elsewhere. In this paper, the properties of several MA cores made of Chinese-produced material are measured. Based on the measured results, a schematic design is produced for a cavity which could obtain 1 kV gap voltage with less than 1.5 kW power dissipation in the frequency range of 0.5-7 MHz. The difference between resonant frequencies obtained from simulation and analytical results is less than 10%.

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