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Träfflista för sökning "WFRF:(Fedele M) srt2:(1998-1999)"

Search: WFRF:(Fedele M) > (1998-1999)

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2.
  • Anderson, D., et al. (author)
  • A variational approach to spherical aberrations in the thermal-wave model for beam dynamics in charged particle accelerators
  • 1998
  • In: Physica Scripta. - : Institute of Physics Publishing. - 0031-8949 .- 1402-4896. ; 58:6, s. 608-612
  • Journal article (peer-reviewed)abstract
    • A direct variational approach involving trial functions and Ritz optimization, which has previously been found very useful in nonlinear optics, is applied to analyze the effects of spherical aberrations on the focusing properties of charged particle beams in particle colliders. As compared to conventional perturbation theory, the variational approach provides a simple and physically clear analysis. Explicit expressions are given for the transverse particle beam density, the spot size, and the luminosity reduction factor at the interaction point, in good agreement with the perturbative results. 
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3.
  • Anderson, D., et al. (author)
  • Modulational instabilities within the thermal wave model description of high energy charged particle beam dynamics
  • 1999
  • In: Physics Letters A. - : Elsevier. - 0375-9601 .- 1873-2429. ; 258:4-6, s. 244-248
  • Journal article (peer-reviewed)abstract
    • Within the thermal wave model (TWM) description, an investigation was made of the longitudinal instability properties of a coasting high energy charged particle beam, where the interaction between the beam and its surroundings is characterized in terms of a complex impedance. The analysis is shown to correctly reproduce the characteristic features of the coherent instability as obtained previously by conventional techniques based on the Vlasov equation for the beam distribution. The results further validate the TWM approach as a consistent alternative description for analyzing the dynamics of high energy charged particle beams.
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