Self-stabilizing positron acceleration in a plasma column

Osterhoff, Jens; Diederichs, Severin; Benedetti, C.; Thévenet, Maxence; Esarey, E.; Schroeder, Carl

doi:10.1103/physrevaccelbeams.25.091304

Cited by 9 publications

(1 citation statement)

References 35 publications

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“…Second, the characteristics of the accelerated positron bunch (emittance, energy spread) may not meet the collider requirements [2,3,[34][35][36]. To improve the transport of positron bunches in PWFA, it is proposed to use various methods (see [37][38][39][40] and references therein). One of them is to use a vacuum channel inside the plasma [41].…”

Section: Jinst 17 P11013mentioning

confidence: 99%

Acceleration and focusing of positron bunch in a dielectric wakefield accelerator with plasma in transport channel

2022

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The paper presents the results of numerical particle-in-cell simulation of the positron bunch focusing during acceleration in a plasma dielectric wakefield accelerator. The wakefield is excited by drive electron bunch in quartz dielectric tube, embedded in a cylindrical metal waveguide. The internal area of the dielectric tube is filled with plasma having in the general case the paraxial vacuum channel. Two different models of the plasma density radius-relationship are investigated: the homogeneous model and the inhomogeneous dependence characterized the capillary discharge. Results of the numerical particle-in-cell simulation show that a simultaneous acceleration and focusing of the test positron bunch in the wakefield is possible. The dependence of transport and acceleration of the positron bunch with change in the size of vacuum channel, waveguide length and the plasma density-radius model is studied.

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Section: Jinst 17 P11013mentioning

confidence: 99%

Acceleration and focusing of positron bunch in a dielectric wakefield accelerator with plasma in transport channel

2022

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Temperature effects in plasma-based positron acceleration schemes using electron filaments

et al. 2023

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Preserving the quality of a positron beam in a plasma-based accelerator, where a wakefield suitable for positron transport and acceleration is generated by means of an electron filament, is challenging. This is due to the nature of the wakefields, characterized by focusing fields that vary nonlinearly in the transverse direction, and by accelerating fields that are non-uniform. These fields also change slice-by-slice along the beam. Maintaining a high beam quality is pivotal for application of positron beams in a plasma-based collider. In this paper, we show that an initial background plasma temperature can help mitigate the positron beam quality degradation in plasma-based accelerators that rely on electron filaments. We show that temperature effects broaden the electron filament and smooth radially both the non-linear transverse and the non-uniform longitudinal wakefields. Using warm plasmas opens up new possibilities to improve beam quality in several plasma-based positron acceleration concepts.

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Lattice Boltzmann method for warm fluid simulations of plasma wakefield acceleration

Simeoni,

Parise,

Guglietta

et al. 2024

Physics of Plasmas

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A comprehensive characterization of lattice Boltzmann (LB) schemes to perform warm fluid numerical simulations of particle wakefield acceleration (PWFA) processes is discussed in this paper. The LB schemes we develop hinge on the moment matching procedure, allowing the fluid description of a warm relativistic plasma wake generated by a driver pulse propagating in a neutral plasma. We focus on fluid models equations resulting from two popular closure assumptions of the relativistic kinetic equations, i.e., the local equilibrium and the warm plasma closure assumptions. The developed LB schemes can, thus, be used to disclose insights on the quantitative differences between the two closure approaches in the dynamics of PWFA processes. Comparisons between the proposed schemes and available analytical results are extensively addressed.

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Self-stabilizing positron acceleration in a plasma column

Cited by 9 publications

References 35 publications

Acceleration and focusing of positron bunch in a dielectric wakefield accelerator with plasma in transport channel

Acceleration and focusing of positron bunch in a dielectric wakefield accelerator with plasma in transport channel

Temperature effects in plasma-based positron acceleration schemes using electron filaments

Lattice Boltzmann method for warm fluid simulations of plasma wakefield acceleration

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