Plasma Injection Schemes for Laser-Plasma Accelerators

Faure, J.

doi:10.5170/CERN-2016-001.143

Published Articles
Report number	arXiv:1705.10542
Title	Plasma Injection Schemes for Laser-Plasma Accelerators
Author(s)	Faure, J. (Palaiseau, Lab. Opt. Appl.)
Publication	Geneva : CERN, 2016
Imprint	2017-05-30
Number of pages	15
Note	15 pages, contribution to the CAS - CERN Accelerator School: Plasma Wake Acceleration, CERN, Geneva, Switzerland, 23 - 29 Nov 2014
In:	10.5170/CERN-2016-001.143
In:	CAS - CERN Accelerator School: Plasma Wake Acceleration, pp.143-157
DOI	10.5170/CERN-2016-001.143
Subject category	Accelerators and Storage Rings
Abstract	Plasma injection schemes are crucial for producing high-quality electron beams in laser-plasma accelerators. This article introduces the general concepts of plasma injection. First, a Hamiltonian model for particle trapping and acceleration in plasma waves is introduced; ionization injection and colliding-pulse injection are described in the framework of this Hamiltonian model. We then proceed to consider injection in plasma density gradients.
Copyright/License	publication: © 2016-2025 CERN (License: CC-BY-4.0)

$The top panel plots the laser amplitude $a$ (red) and the wakefield potential $\phi$ (blue); the middle panel shows the corresponding normalized electric field $E_z/E_0$ (where $E_0=m_{\rm e}c\,\omega_{\rm p}/e$ is the wave-breaking field). The bottom panel shows the electron density perturbation $n(\zeta)/n_0-1$.$ $The top panel plots the laser amplitude $a^2$ (red), the wakefield potential (blue), and the longitudinal electric field (black dashed); the bottom panel shows the associated electron trajectories in phase space. The black line in the bottom panel represents the fluid orbit, the red line the separatrix, and the dashed blue lines various trapped orbits. The $y$-axis is in log-scale and, to avoid negative values, we have plotted $u_z+1-\min(u_{\rm fluid})$, where $u_{\rm fluid}(\zeta)$ is the fluid orbit. The horizontal black dashed line represents $u_z=0$, while the horizontal red dashed line represents $u_z=\beta_{\rm p}\gamma_{\rm p}$. The parameters are $a_0=2$, $n_{\rm e}/n_{\rm c}=0.44\%$, $\lambda=0.8\:\mathrm{\mu m}$ and $\tau=20\:\mathrm{fs}$.$ $(a) Trapping thresholds plotted as a function of wake amplitude (where $\phi_{\min}$ represents the minimum of the wake potential), for three different wake phase velocities. (b)~Trapping thresholds plotted as a function of $\gamma_{\rm p}$, the Lorentz factor associated with the wakefield velocity, for three different wake amplitudes.$ Show more plots

Corresponding record in: Inspire

Επιστροφή στην αναζήτηση

Δημιουργία εγγραφής 2016-08-03, τελευταία τροποποίηση 2022-08-10

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1418884_143-157 -

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arXiv:1705.10542 -

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