Self-consistent calculation of transient beam loading in electron storage rings with passive harmonic cavities
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چکیده
منابع مشابه
Harmonic Cavities and Longitudinal Beam Stability in Electron Storage Rings∗
Harmonic cavities have been used in storage rings to increase beam lifetime and Landau damping by lengthening the bunch. The need for lifetime increase is particularly great in the present generation of low to medium energy synchrotron light sources where the small transverse beam sizes lead to realitively short lifetimes from large-angle intrabeam ( Touschek) scattering. We review the beam dyn...
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The analysis of beam loading in the RF systems olhighenergy storage rings (for example, the PEP e-e+ ring ) is complicated by the fact that the time, Tb, between the passage of successive bunches is comparable to the cavity filling time, Tf. In this paper, beam loading expressions are first summarized for the usual case in which Th << Tt. The theory of phase oscillations in the heavily-bea&loa&...
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A formal expression is obtained for the energy loss per . . _ turn, of a rigid bunch of electrons, to a closed cy lindrical cavity with quality factor Q. -The expression is valid provided the diameter of the entrance and exit ports for the beam are small ._.. .'compared to the bunch length. The effect of the ports is studied in an independent computational method. The energy loss is numerically...
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Harmonic cavities have been used in storage rings to lengthen bunches and increase beam lifetimes dominated by Touschek scattering. Transient beam loading in the harmonic cavities generated by asymmetries in the fill pattern can cause significant variation of the beam phase and bunch length along the bunch train when the longitudinal restoring force has been reduced, resulting in a significant ...
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Abstract The conventional electrical model analogy of a RF cavity is a shunt RLC circuit supplied by two current sources representing the RF amplifier and the beam. In the literature, the impedance of the cavity is often calculated in the Fourier domain. This type of cavity modelling has two drawbacks: First, it assumes a perfect matching between the cavity and the amplifier therefore it neglec...
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ژورنال
عنوان ژورنال: Physical Review Accelerators and Beams
سال: 2018
ISSN: 2469-9888
DOI: 10.1103/physrevaccelbeams.21.120701