Numerical solution of the Haïssinski equation for the equilibrium state of a stored electron beam
2018; American Physical Society; Volume: 21; Issue: 12 Linguagem: Inglês
10.1103/physrevaccelbeams.21.124401
ISSN2469-9888
Autores Tópico(s)Quantum, superfluid, helium dynamics
ResumoThe longitudinal charge density of an electron beam in its equilibrium state is given by the solution of the Haïssinski equation, which provides a stationary solution of the Vlasov-Fokker-Planck equation. The physical input is the longitudinal wake potential. We formulate the Haïssinski equation as a nonlinear integral equation with the normalization integral stated as a functional of the solution. This equation can be solved in a simple way by the matrix version of Newtons's iteration, beginning with the Gaussian as a first guess. We illustrate for several quasirealistic wake potentials. Convergence is extremely robust, even at currents much higher than nominal for the storage rings considered. The method overcomes limitations of earlier procedures, and provides the convenience of automatic normalization of the solution.5 MoreReceived 3 August 2018DOI:https://doi.org/10.1103/PhysRevAccelBeams.21.124401Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBeam code development & simulation techniquesBeam instabilitiesRelativistic multiple-particle dynamicsAccelerators & Beams
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