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  • Open Access

Space charge induced resonance excitation in high intensity rings

S. Cousineau and S. Y. Lee

J. A. Holmes and V. Danilov

A. Fedotov

  • Indiana University, Bloomington, Indiana 47405

  • Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831

  • Brookhaven National Laboratory, Upton, New York 11973

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Phys. Rev. ST Accel. Beams 6, 034205 – Published 26 March, 2003

DOI: https://doi.org/10.1103/PhysRevSTAB.6.034205

Abstract

We present a particle core model study of the space charge effect on high intensity synchrotron beams, with specific emphasis on the Proton Storage Ring (PSR) at Los Alamos National Laboratory. Our particle core model formulation includes realistic lattice focusing and dispersion. We transport both matched and mismatched beams through real lattice structure and compare the results with those of an equivalent uniform-focusing approximation. The effects of lattice structure and finite momentum spread on the resonance behavior are specifically targeted. Stroboscopic maps of the mismatched envelope are constructed and show high-order resonances and stochastic effects that dominate at high mismatch or high intensity. We observe the evolution of the envelope phase-space structure during a high intensity PSR beam accumulation. Finally, we examine the envelope-particle parametric resonance condition and discuss the possibility for halo growth in synchrotron beams due to this mechanism.

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Phys. Rev. ST Accel. Beams 6, 034205– Published 26 March, 2003
  • Received 4 September 2002
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