Frontiers of Particle Beams: Intensity Limitations

Dienes, Margaret; Month, M.; Turner, Stuart

doi:10.1007/3-540-55250-2

Cited by 19 publications

(6 citation statements)

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“…The scalar z b describes the relationship between the beam current i and the voltage v seen by the beam when no waveguide mode is excited. As a result of (4) and (5), this coefficient is the commonly known longitudinal impedance [23]. The quantities h, k and z b do depend on the transversal offsets x b and y b .…”

Section: A Generalization Of Scattering Matricesmentioning

confidence: 99%

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Generalization of coupled S -parameter calculation to compute beam impedances in particle accelerators

Flisgen

Gjonaj

Glock

et al. 2020

Phys. Rev. Accel. Beams

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In this article, a decomposition approach for the computation of beam coupling impedances is proposed. This approach can account for the mutual electromagnetic coupling in long accelerator structures consisting of several consecutive segments. The method is based on the description of the individual segments using a multimodal network matrix formulation in which the charged particle beam is considered as an additional port. Then, the generalized multimodal network matrices of all segments are combined to a multimodal network matrix of the complete structure. The beam coupling impedance as well as the scattering parameters of the full structure are recovered as particular matrix elements in this multimodal network matrix. The new method generalizes Coupled S-Parameter Calculation (CSC) introduced in earlier work such that charged particle beams are considered. Consequently, the introduced scheme is referred to as CSC BEAM. Application examples for realistic accelerator components such as the simulation of a full TESLA 1.3 GHz-cavity of the European XFEL are provided. These simulations demonstrate the high accuracy and numerical performance of the proposed method.

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Section: A Generalization Of Scattering Matricesmentioning

confidence: 99%

“…This matrix is determined by the permutation matrix P, the topology of the segments to be coupled, and by the number of internal terminals. Using (23) to replace b int in (21) and sorting for the internal incident wave amplitudes yields…”

Section: Concatenation Of the Elementsmentioning

confidence: 99%

Generalization of coupled S -parameter calculation to compute beam impedances in particle accelerators

Flisgen

Gjonaj

Glock

et al. 2020

Phys. Rev. Accel. Beams

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“…The potential of incoming beam is written as [8] Uðx;y; s;zÞ where r e is classical electron radius, γ is Lorentz factor, N p is amount of particles, σ x;y;z is horizontal, vertical, and longitudinal beam sizes, 2θ is crossing angle, x; y; s is horizontal, vertical, and longitudinal coordinates, and z ¼ s − ct is the particle's position with respect to the center of the bunch and describes synchrotron oscillations. For simplicity, we will neglect the particle's synchrotron oscillations therefore z ¼ 0.…”

Section: Analytical Calculations a Beam-beammentioning

confidence: 99%

Beam-beam effects investigation and parameters optimization for a circulare+e−collider at very high energies

Bogomyagkov

Levichev

Shatilov

2014

Phys. Rev. ST Accel. Beams

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Several proposals exist for future circular electron-positron colliders designed for precise measurements of the Higgs boson characteristics and electroweak processes. At very high energies, synchrotron radiation of the particles in a strong electromagnetic field of the oncoming bunch (beamstrahlung) becomes extremely important, because of degradation of the beam lifetime and luminosity. We present theoretical calculations of beamstrahlung (including the beam lifetime reduction and the energy spread increase) which are benchmarked against quasi-strong-strong computer simulations. Calculation results are used to optimize TLEP (triple LEP) project (CERN).

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“…This is approximately true for very energetic photons, but at very low frequencies ω ≪ ω c , the emission angle is θ ≈ ð2ω c =ωÞ 1=3 =γ. The number of photons emitted is approximately [8,10,11] n γ ¼ 5 2…”

Section: B Beamstrahlungmentioning

confidence: 99%

Strong field processes in beam-beam interactions at the Compact Linear Collider

Esberg

Uggerhøj

Dalena

et al. 2014

Phys. Rev. ST Accel. Beams

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The demand for high luminosity in the next generation of linear e þ e − colliders necessitates extremely dense beams, giving rise to strong fields at the collision point, and therefore the impact of the field on the physical processes occurring at the interaction point must be considered. These processes are well described by the interaction of the individual lepton with the field of the oncoming bunch, and they depend strongly on the beamstrahlung parameter ϒ which expresses the field experienced by the lepton in units of the critical field. In this paper, we describe calculations and simulations of strong field processes-also of higher order-at the interaction point.

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Frontiers of Particle Beams: Intensity Limitations

Cited by 19 publications

References 0 publications

Generalization of coupled S -parameter calculation to compute beam impedances in particle accelerators

Generalization of coupled S -parameter calculation to compute beam impedances in particle accelerators

Beam-beam effects investigation and parameters optimization for a circulare+e−collider at very high energies

Strong field processes in beam-beam interactions at the Compact Linear Collider

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