Overview of CSR codes

Bassi, Gabriele; Agoh, T.; Dohlus, M.; Giannessi, L.; Hajima, Ryoichi; Kabel, A.; Limberg, T.; Quattromini, M.

doi:10.1016/j.nima.2005.10.067

Cited by 29 publications

(21 citation statements)

References 37 publications

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“…Another approach is to solve numerically the approximate equations, which are a Schrodinger-type equation. These numerical methods are very well described in [5][6][7][8]. However, these methods still have several assumptions and do not give a full description of the CSR fields.…”

Section: Introductionmentioning

confidence: 99%

Field dynamics of coherent synchrotron radiation using a direct numerical solution of Maxwell’s equations

Novokhatski

2011

Phys. Rev. ST Accel. Beams

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We present and discuss the properties of the coherent electromagnetic fields of a very short, ultrarelativistic bunch in a rectangular vacuum chamber inside a bending magnet. The analysis is based on the results of a direct numerical solution of Maxwell's equations together with Newton's equations. We use a new dispersion-free time-domain algorithm which employs a more efficient use of finite element mesh techniques and, hence, produces self-consistent and stable solutions for very short bunches. We investigate the fine structure of the coherent synchrotron radiation fields. We also discuss coherent edge radiation. We present a clear picture of the field using the electric field lines constructed from the numerical solutions. This method should be useful in the study of existing and future concepts of particle accelerators and ultrafast coherent light sources, where high peak currents and very short bunches are envisioned.

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Section: Introductionmentioning

confidence: 99%

Field dynamics of coherent synchrotron radiation using a direct numerical solution of Maxwell’s equations

Novokhatski

2011

Phys. Rev. ST Accel. Beams

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“…The idea is to evaluate these potentials from the evolutionary history of the charge density nr; t as the beam transits a magnetic bend. The end result would be a fully three-dimensional (3D) model of CSR, something that has been notoriously difficult to achieve (for a survey of CSR codes see [27], and references therein).…”

Section: Introductionmentioning

confidence: 99%

Particle-in-cell beam dynamics simulations with a wavelet-based Poisson solver

Terzić

Pogorelov

Bohn

2007

Phys. Rev. ST Accel. Beams

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We report on a successful implementation of a three-dimensional wavelet-based solver for the Poisson equation with Dirichlet boundary conditions, optimized for use in particle-in-cell (PIC) simulations. The solver is based on the operator formulation of the conjugate gradient algorithm, for which effectively diagonal preconditioners are available in wavelet bases. Because of the recursive nature of PIC simulations, a good initial approximation to the iterative solution is always readily available, which we demonstrate to be a key advantage in terms of overall computational speed. While the Laplacian remains sparse in a wavelet representation, the wavelet-decomposed potential and density can be rendered sparse through a procedure that amounts to simultaneous compression and denoising of the data. We explain how this procedure can be carried out in a controlled and near-optimal way, and show the effect it has on the overall solver performance. After testing the solver in a stand-alone mode, we integrated it into the IMPACT-T beam dynamics particle-in-cell code and extensively benchmarked it against the IMPACT-T with the native FFT-based Poisson solver. We present and discuss these benchmarking results, as well as the results of modeling the Fermi/NICADD photoinjector using IMPACT-T with the wavelet-based solver.

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“…In these machines, when an electron bunch passes through a bending magnet, the emission of the coherent synchrotron radiation (CSR) induces energy modulation along the bunch and dilutes transverse emittance, leading to degradation of the beam quality. This has strongly motivated theoretical [6][7][8][9] and numerical analyses [10][11][12][13][14][15][16][17][18] on CSR over the past few decades.…”

Section: Introductionmentioning

confidence: 99%

Suppression of the emittance growth induced by coherent synchrotron radiation in triple-bend achromats

Huang

Jiao

et al. 2015

Chinese Phys. C

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Abstract:The coherent synchrotron radiation (CSR) effect in a bending path plays an important role in transverse emittance dilution in high-brightness light sources and linear colliders, where the electron beams are of short bunch length and high peak current. Suppression of the emittance growth induced by CSR is critical to preserve the beam quality and help improve the machine performance. It has been shown that the CSR effect in a double-bend achromat (DBA) can be analyzed with the two-dimensional point-kick analysis method. In this paper, this method is applied to analyze the CSR effect in a triple-bend achromat (TBA) with symmetric layout, which is commonly used in the optics designs of energy recovery linacs (ERLs). A condition of cancelling the CSR linear effect in such a TBA is obtained, and is verified through numerical simulations. It is demonstrated that emittance preservation can be achieved with this condition, and to a large extent, has a high tolerance to the fluctuation of the initial transverse phase space distribution of the beam.

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Overview of CSR codes

Cited by 29 publications

References 37 publications

Field dynamics of coherent synchrotron radiation using a direct numerical solution of Maxwell’s equations

Field dynamics of coherent synchrotron radiation using a direct numerical solution of Maxwell’s equations

Particle-in-cell beam dynamics simulations with a wavelet-based Poisson solver

Suppression of the emittance growth induced by coherent synchrotron radiation in triple-bend achromats

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