Experimental particle tracking

  • D. A. Edwards
  • M. J. Syphers
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 343)


The nonlinear dynamics of transverse particle oscillations are being studied experimentally with several large synchrotrons. In the FNAL Tevatron and the CERN SpS, sextupole magnets are used as the sources of nonlinear forces. Studies are also being performed in the FNAL Main Ring at its injection energy, an inherently nonlinear environment. For the Tevatron studies, agreement between simulation and experiment for phase-space distortion and amplitude dependence of tune is in general good. Trapping of particles in resonance islands is observed, and island properties studied. Measurements of dynamic aperture at both the Tevatron and the SpS reveal smaller apertures than those expected from short-term tracking. Longer tracking runs, with the inclusion of synchrotron oscillations and closed-orbit errors, are necessary to achieve qualitative agreement. Though the nonlinear environment of the Main Ring is not subject to control, the results of these experiments have significant features in common with the other two experiments.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    A. W. Chao et al, Phys. Rev. Lett. 61, 2752 (1988).Google Scholar
  2. [2]
    S. Peggs, C. Saltmarsh, R. Talman, “Million Revolution Accelerator Beam Instrument for Logging and Evaluation,” SSC-169, March 1988.Google Scholar
  3. [3]
    Tevex was written by S. G. Peggs and is discussed in “A Study of Nonlinear Dynamics in the Fermilab Tevatron,” N. Merminga, University of Michigan, 1989 (Ph.D. Thesis).Google Scholar
  4. [4]
    See A. Hilaire, “Dynamical Aperture at the SpS,” Proc. of Second Advanced ICFA Beam Dynamics Workshop, CERN 88-04, Lugano, 1988, and L. Evans et al, "The Nonlinear Dynamic Aperture Experiment in the SpS,“ EPAC Conference, Rome, 1988.Google Scholar
  5. [5]
    J. Gareyte et al, “Effect of Sextupoles on the Single Particle Dynamics in the CERN SpS,” CERN SPS/88-45, 1988.Google Scholar
  6. [6]
    R. Gerig, “Main Ring Dynamic Aperture Studies,” FNAL internal report EXP-162, January 1989.Google Scholar
  7. [7]
    M. Syphers, “Beam-Gas Scattering Lifetimes in the Fermilab Main Ring,” FN-484, Fermilab, 1988.Google Scholar
  8. [8]
    R. Gerig et al, “Simulations of the Fermilab Main Ring,” Proc. of 1987 IEEE PAC, No. 87CH2387-9, March 1987, and R. Gerig et al., “Improvements to the Fermilab Main Ring,“ European Accelerator Conference, Rome, 1988.Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • D. A. Edwards
    • 1
  • M. J. Syphers
    • 1
  1. 1.FermilabBataviaUSA

Personalised recommendations