Bunch length manipulation in a diffraction-limited storage ring

  • In an electron storage ring, the bunch length can be increased or decreased by using harmonic cavities. Taking the High Energy Photon Source as an example, we test the bunch length manipulation with harmonic cavities in a diffraction-limited storage ring (DLSR). The most important collective effects in a DLSR, intra-beam scattering and Touschek effects, are evaluated for different bunch-length patterns. Our study shows that it is feasible to produce long and short bunches simultaneously in a DLSR, without causing severe emittance growth and reduction in lifetime.
      PCAS:
  • [1] Hettel R. Journal of Synchrotron Radiation, 2014, 21: 843-855
    [2] JIAO Yi et al. High Power Laser and Particle Beams. 27(efeq4)(in Chinese)
    [3] XU Gang, JIAO Yi. Chin. Phys. C, 2013, 37(efeq5): 057003
    [4] JIAO Yi, XU Gang. Chin. Phys. C, 2013, 37(efeq9): 117005
    [5] XU Gang, JIAO Yi, TIAN Sai-Ke. Chin. Phys. C, 2013, 37(6): 067002
    [6] JIAO Yi, XU Gang. PEPX-type Lattice Design and Optimization for the High Energy Photon Source. Chin. Phys. C, to be published
    [7] Bjorken J D, Mtingwa S K. Particle Accelerators. 1983, 13(3-4): 115-143
    [8] Piwinski.A. The Touschek Effect in Strong Focusing Storage Rings. DESY 98-179, 1998
    [9] TIAN Sai-Ke, WANG Jiu-Qing, XU Gang et al. Intra-beam Scattering Studies for Low Emittance at BAPS. Chin. Phys. C, to be published
    [10] Tavares P F et al. Journal of Synchrotron Radiation, 2014, 21: 862-877
    [11] Zholents A A, Zolotorev M S. Phys. Rev. Lett., 1999, 76:912
    [12] Zholents A A et al. Nucl. Instrum. Methods Phys. Res., Sect. A, 1999, 425: 385
    [13] Feikes J et al. Sub-picosecond Electron Bunches in the BESSY Storage Ring. In: Luzern, Switzerland. Proc. of EPAC. 2004
    [14] Wüstefeld G et al. Simultaneous Long and Short Electron Bunches in the BESSYII Storage Ring. In: San Sebastián, Spain. Proc. of IPAC 2011
    [15] Stupakov.G, Heifets.S. Phys. Rev. ST Accel. Beams, 2002, 5: 054402
    [16] Borland M. elegant: A Flexible SDDS-Compliant Code for Accelerator Simulation. Advanced Photon Source LS-287, September 2000
    [17] Hofmann A, Myers S. Beam Dynamics in a Double RF System. In: Birkhäuser Basel. Proc. of the 11th International Conference on High-Energy Accelerators. 1980. 610-614
    [18] CAI Y et al. Phys. Rev. ST Accel. Beams, 2012, 15: 054002
  • [1] Hettel R. Journal of Synchrotron Radiation, 2014, 21: 843-855
    [2] JIAO Yi et al. High Power Laser and Particle Beams. 27(efeq4)(in Chinese)
    [3] XU Gang, JIAO Yi. Chin. Phys. C, 2013, 37(efeq5): 057003
    [4] JIAO Yi, XU Gang. Chin. Phys. C, 2013, 37(efeq9): 117005
    [5] XU Gang, JIAO Yi, TIAN Sai-Ke. Chin. Phys. C, 2013, 37(6): 067002
    [6] JIAO Yi, XU Gang. PEPX-type Lattice Design and Optimization for the High Energy Photon Source. Chin. Phys. C, to be published
    [7] Bjorken J D, Mtingwa S K. Particle Accelerators. 1983, 13(3-4): 115-143
    [8] Piwinski.A. The Touschek Effect in Strong Focusing Storage Rings. DESY 98-179, 1998
    [9] TIAN Sai-Ke, WANG Jiu-Qing, XU Gang et al. Intra-beam Scattering Studies for Low Emittance at BAPS. Chin. Phys. C, to be published
    [10] Tavares P F et al. Journal of Synchrotron Radiation, 2014, 21: 862-877
    [11] Zholents A A, Zolotorev M S. Phys. Rev. Lett., 1999, 76:912
    [12] Zholents A A et al. Nucl. Instrum. Methods Phys. Res., Sect. A, 1999, 425: 385
    [13] Feikes J et al. Sub-picosecond Electron Bunches in the BESSY Storage Ring. In: Luzern, Switzerland. Proc. of EPAC. 2004
    [14] Wüstefeld G et al. Simultaneous Long and Short Electron Bunches in the BESSYII Storage Ring. In: San Sebastián, Spain. Proc. of IPAC 2011
    [15] Stupakov.G, Heifets.S. Phys. Rev. ST Accel. Beams, 2002, 5: 054402
    [16] Borland M. elegant: A Flexible SDDS-Compliant Code for Accelerator Simulation. Advanced Photon Source LS-287, September 2000
    [17] Hofmann A, Myers S. Beam Dynamics in a Double RF System. In: Birkhäuser Basel. Proc. of the 11th International Conference on High-Energy Accelerators. 1980. 610-614
    [18] CAI Y et al. Phys. Rev. ST Accel. Beams, 2012, 15: 054002
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TIAN Sai-Ke, JIAO Yi and WANG Jiu-Qing. Bunch length manipulation in a diffraction-limited storage ring[J]. Chinese Physics C, 2015, 39(12): 127001. doi: 10.1088/1674-1137/39/12/127001
TIAN Sai-Ke, JIAO Yi and WANG Jiu-Qing. Bunch length manipulation in a diffraction-limited storage ring[J]. Chinese Physics C, 2015, 39(12): 127001.  doi: 10.1088/1674-1137/39/12/127001 shu
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Received: 2015-02-16
Revised: 2015-07-15
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    Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

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Bunch length manipulation in a diffraction-limited storage ring

  • 1. Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by National Natural Science Foundation of China (11475202, 11405187) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

Abstract: In an electron storage ring, the bunch length can be increased or decreased by using harmonic cavities. Taking the High Energy Photon Source as an example, we test the bunch length manipulation with harmonic cavities in a diffraction-limited storage ring (DLSR). The most important collective effects in a DLSR, intra-beam scattering and Touschek effects, are evaluated for different bunch-length patterns. Our study shows that it is feasible to produce long and short bunches simultaneously in a DLSR, without causing severe emittance growth and reduction in lifetime.

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