Longitudinal beam dynamics simulation in electron rings in strong rf focusing regime

Falbo, Luciano; Alesini, D.; Migliorati, M.

doi:10.1103/physrevstab.9.094402

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…With a high-dispersion drift and single rf cavity, strong longitudinal focusing pattern is realized, see [3][4][5][6].…”

Section: Model Of Longitudinal Beam Dynamics In Compton Ringsmentioning

confidence: 99%

Longitudinally strong focusing lattice for Compton--ring gamma sources

Bulyak¹,

Rinolfi²,

Urakawa³

2022

Preprint

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Electron storage rings of GeV energy with laser pulse stacking cavities are promising intense sources of polarized hard photons which, via pair production, can be used to generate polarized positron beams. Dynamics of electron bunches circulating in a storage ring and interacting with high-power laser pulses is studied both analytically and by simulation. Common features and differences in the behavior of bunches interacting with an extremely high power laser pulse and with a moderate pulse are discussed. Also considerations on particular lattice designs for Compton gamma rings are presented. I. INTRODUCTION. BOTTLE-NECKS.

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“…With a high-dispersion drift and single rf cavity, strong longitudinal focusing pattern is realized, see [3][4][5][6].…”

Section: Model Of Longitudinal Beam Dynamics In Compton Ringsmentioning

confidence: 99%

Longitudinally strong focusing lattice for Compton--ring gamma sources

Bulyak¹,

Rinolfi²,

Urakawa³

2022

Preprint

View full text Add to dashboard Cite

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“…We suppose that the energy exchange between the charge and the surrounding environment is localized in a single point in the machine and that the minimum time step is the revolution period T 0 . However, the same procedure can be extended to cases in which it can be necessary to update the longitudinal dynamics several times per turn, as, for example, in a strong rf focusing regime [17], or in some cases when the longitudinal broadband impedance due to space charge requires it. By supposing β ¼ 1, we can then write…”

Section: Common Approach In Wakefield Simulationsmentioning

confidence: 99%

Multibunch and multiparticle simulation code with an alternative approach to wakefield effects

Migliorati

Palumbo

2015

Phys. Rev. ST Accel. Beams

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The simulation of beam dynamics in the presence of collective effects requires a strong computational effort to take into account, in a self-consistent way, the wakefield acting on a given charge and produced by all the others. Generally this is done by means of a convolution integral or sum. Moreover, if the electromagnetic fields consist of resonant modes with high quality factors, responsible, for example, for coupled bunch instabilities, a charge is also affected by itself in previous turns, and a very long record of wakefield must be properly taken into account. In this paper we present a new simulation code for the longitudinal beam dynamics in a circular accelerator, which exploits an alternative approach to the currently used convolution sum, reducing the computing time and avoiding the issues related to the length of wakefield for coupled bunch instabilities. With this approach it is possible to simulate, without the need for large computing power, simultaneously, the single and multibunch beam dynamics including intrabunch motion. Moreover, for a given machine, generally both the coupling impedance and the wake potential of a short Gaussian bunch are known. However, a classical simulation code needs in input the so- called “Green” function, that is the wakefield produced by a point charge, making necessary some manipulations to use the wake potential instead of the Green function. The method that we propose does not need the wakefield as input, but a particular fitting of the coupling impedance requiring the use of the resonator impedance model, thus avoiding issues related to the knowledge of the Green function. The same approach can also be applied to the transverse case and to linear accelerators as well

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Longitudinal beam dynamics simulation in electron rings in strong rf focusing regime

Cited by 2 publications

References 7 publications

Longitudinally strong focusing lattice for Compton--ring gamma sources

Longitudinally strong focusing lattice for Compton--ring gamma sources

Multibunch and multiparticle simulation code with an alternative approach to wakefield effects

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