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Chinese Physics C> 2016, Vol. 40> Issue(1) : 017002 DOI: 10.1088/1674-1137/40/1/017002

Simulations to study the static polarization limit for RHIC lattice

  • 1.

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

  • 2.

     University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

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

  • A study of spin dynamics based on simulations with the Polymorphic Tracking Code (PTC) is reported, exploring the dependence of the static polarization limit on various beam parameters and lattice settings for a practical RHIC lattice. It is shown that the behavior of the static polarization limit is dominantly affected by the vertical motion, while the effect of beam-beam interaction is small. In addition, the ''nonresonant beam polarization'' observed and studied in the lattice-independent model is also observed in this lattice-dependent model. Therefore, this simulation study gives insights of polarization evolution at fixed beam energies, that are not available in simple spin tracking.
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  • References

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    [20] V. Schoefer et al, in Proceedings of IPAC2012 (New Orleans, USA, 2012); for the measured store polarization deterioration data in RHIC fills, refer to the RHIC spin group website: https://wiki.bnl.gov/rhicspin/RHIC_spin_Group
    [21] Z. Duan, M. Bai, T. Roser and Q. Qin, in Proceedings of 21th International Spin Physics Symposium (Beijing, China, 2014)
    [22] F. Schmidt, E. Forest, and E. McIntosh, CERN preprint, CERN-SL 2002, 2002-044-AP; KEK preprint KEK-REPORT 2002. 2002-3
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    [25] V. I. Ptitsyn and Y. M. Shatunov, Helical Spin Rotators and Snakes, in Proceedings of Third Workshop on Siberian Snakes and Spin Rotators, edited by A. Luccio and T. Roser, (New York: BNL, 1994), p.15; BNL preprint, BNL-Report 1994, 52453
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Zhe Duan and Qing Qin. Simulations to study the static polarization limit for RHIC lattice[J]. Chinese Physics C, 2016, 40(1): 017002. doi: 10.1088/1674-1137/40/1/017002
Zhe Duan and Qing Qin. Simulations to study the static polarization limit for RHIC lattice[J]. Chinese Physics C, 2016, 40(1): 017002.  doi: 10.1088/1674-1137/40/1/017002 shu
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Received: 2015-04-28
Revised: 2015-08-27
Fund

    Supported by the U.S. Department of Energy (DE-AC02-98CH10886), Hundred-Talent Program (Chinese Academy of Sciences), and National Natural Science Foundation of China (11105164)

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Simulations to study the static polarization limit for RHIC lattice

    Corresponding author: Zhe Duan,
  • 1. Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China
  • Received Date: 2015-04-28
  • Accepted Date: 2015-08-27
  • Available Online: 2016-01-20
Fund Project:  Supported by the U.S. Department of Energy (DE-AC02-98CH10886), Hundred-Talent Program (Chinese Academy of Sciences), and National Natural Science Foundation of China (11105164)

Abstract: A study of spin dynamics based on simulations with the Polymorphic Tracking Code (PTC) is reported, exploring the dependence of the static polarization limit on various beam parameters and lattice settings for a practical RHIC lattice. It is shown that the behavior of the static polarization limit is dominantly affected by the vertical motion, while the effect of beam-beam interaction is small. In addition, the ''nonresonant beam polarization'' observed and studied in the lattice-independent model is also observed in this lattice-dependent model. Therefore, this simulation study gives insights of polarization evolution at fixed beam energies, that are not available in simple spin tracking.

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