scholarly journals Optimization of Electron Beams Based on Plasma-Density Modulation in a Laser-Driven Wakefield Accelerator

2021 ◽  
Vol 11 (6) ◽  
pp. 2560
Author(s):  
Lintong Ke ◽  
Changhai Yu ◽  
Ke Feng ◽  
Zhiyong Qin ◽  
Kangnan Jiang ◽  
...  
Keyword(s):  
Shock Wave ◽  
Electron Beams ◽  
Three Dimensional ◽  
Mean Square ◽  
High Reproducibility ◽  
Practical Applications ◽  
Particle In Cell ◽  
Laser Wakefield ◽  
Density Modulation ◽  
Wakefield Accelerator

We demonstrate a simple but efficient way to optimize and improve the properties of laser-wakefield-accelerated electron beams (e beams) based on a controllable shock-induced density down-ramp injection that is achieved with an inserted tunable shock wave. The e beams are tunable from 400 to 800 MeV with charge ranges from 5 to 180 pC. e beams with high reproducibility (of ~95% in consecutive 100 shots) were produced in elaborate experiments with an average root- mean-square energy spread of 0.9% and an average divergence of 0.3 mrad. Three-dimensional particle-in-cell (PIC) simulations were also performed to accordingly verify and uncover the process of the injection and the acceleration. These tunable e beams will facilitate practical applications for advanced accelerator beam sources.

scholarly journals Scissor-cross ionization injection in laser wakefield accelerators

2022 ◽  
Author(s):  
Jia Wang ◽  
Ming Zeng ◽  
Xiaoning Wang ◽  
Dazhang Li ◽  
Jie Gao
Keyword(s):  
Three Dimensional ◽  
Laser Pulses ◽  
Acute Angle ◽  
Energy Spread ◽  
Particle In Cell ◽  
High Injection ◽  
Dope Ratio ◽  
Laser Wakefield ◽  
Driving Pulse ◽  
Wakefield Accelerator

Abstract We propose to use a frequency doubled pulse colliding with the driving pulse at an acute angle to trigger ionization injection in a laser wakefield accelerator. This scheme effectively reduces the duration that injection occurs, thus high injection quality is obtained. Three-dimensional particle-in-cell simulations show that electron beams with energy of ~500 MeV, charge of ~40 pC, energy spread of ~1% and normalized emittance of a few millimeter milliradian can be produced by ~100 TW laser pulses. By adjusting the angle between the two pulses, the intensity of the trigger pulse and the gas dope ratio, the charge and energy spread of the electron beam can be controlled.

scholarly journals Laser wakefield acceleration of electrons from a density-modulated plasma

2014 ◽  
Vol 32 (3) ◽  
pp. 449-454 ◽  
Author(s):  
D.N. Gupta ◽  
K. Gopal ◽  
I.H. Nam ◽  
V.V. Kulagin ◽  
H. Suk
Keyword(s):  
Magnetic Field ◽  
Electron Energy ◽  
Physical Mechanism ◽  
Laser Wakefield Acceleration ◽  
Theoretical Formulation ◽  
Particle In Cell ◽  
Phase Velocities ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Density Modulation

AbstractThis research reports the increased electron energy gain from laser wakefield acceleration in density-modulated plasma with an external magnetic field. Periodic plasma density- modulation can excite higher harmonics of different phase velocities of fundamental wakefield that can assist in improving the self-trapping of pre-accelerated electrons to accelerate them for higher energy. Furthermore, the applied magnetic field assisted self-injection can also contribute in electron energy enhancement during the acceleration. The physical mechanism is described with a theoretical formulation for this scheme. Results of two-dimensional particle-in-cell simulations are reported to understand the proposed idea.

scholarly journals Generation of tunable, 100–800 MeV quasi-monoenergetic electron beams from a laser-wakefield accelerator in the blowout regime

2012 ◽  
Vol 19 (5) ◽  
pp. 056703 ◽  
Author(s):  
S. Banerjee ◽  
N. D. Powers ◽  
V. Ramanathan ◽  
I. Ghebregziabher ◽  
K. J. Brown ◽  
...  
Keyword(s):  
Electron Beams ◽  
Monoenergetic Electron ◽  
Laser Wakefield ◽  
Wakefield Accelerator ◽  
Laser Wakefield Accelerator

scholarly journals Three-Dimensional Structure of the Laser Wakefield Accelerator in the Blowout Regime

2008 ◽  
Vol 36 (4) ◽  
pp. 1124-1125
Author(s):  
J. F. Vieira ◽  
S. F. Martins ◽  
F. Fiuza ◽  
R. A. Fonseca ◽  
L. O. Silva ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dimensional Structure ◽  
Three Dimensional Structure ◽  
Laser Wakefield ◽  
Wakefield Accelerator ◽  
Laser Wakefield Accelerator

scholarly journals Parametric study of high-energy ring-shaped electron beams from a laser wakefield accelerator

2021 ◽  
Author(s):  
Antoine Maitrallain ◽  
Enrico Brunetti ◽  
Matthew Streeter ◽  
Brendan Kettle ◽  
Roman Spesyvtsev ◽  
...  
Keyword(s):  
Parametric Study ◽  
Electron Beams ◽  
High Energy ◽  
High Charge ◽  
Particle In Cell ◽  
Radiation Sources ◽  
Plasma Wakefield Accelerators ◽  
Laser Wakefield ◽  
Parametric Studies ◽  
Wakefield Accelerators

Abstract Laser wakefield accelerators commonly produce on-axis, low-divergence, high-energy electron beams. However, a high charge, annular shaped beam can be trapped outside the bubble and accelerated to high energies. Here we present a parametric study on the production of low-energy-spread, ultra-relativistic electron ring beams in a two-stage gas cell. Ring-shaped beams with energies higher than 750 MeV are observed simultaneously with on axis, continuously injected electrons. Often multiple ring shaped beams with different energies are produced and parametric studies to control the generation and properties of these structures were conducted. Particle tracking and particle-in-cell simulations are used to determine properties of these beams and investigate how they are formed and trapped outside the bubble by the wake produced by on-axis injected electrons. These unusual femtosecond duration, high-charge, high-energy, ring electron beams may find use in beam driven plasma wakefield accelerators and radiation sources.

scholarly journals ELBA (electron beams in accelerators) particle simulation code

1994 ◽  
Vol 12 (2) ◽  
pp. 273-282 ◽  
Author(s):  
Glenn Joyce ◽  
Jonathan Krall ◽  
Steven Slinker
Keyword(s):  
Large Scale ◽  
Electron Beams ◽  
Three Dimensional ◽  
Forward Direction ◽  
Laboratory Frame ◽  
Particle Simulation ◽  
Simulation Code ◽  
Particle In Cell ◽  
Charged Particle Beams ◽  
Cell Simulation

ELBA is a three-dimensional, particle-in-cell, simulation code that has been developed to study the propagation and transport of relativistic charged particle beams. The code is particularly suited to the simulation of relativistic electron beams propagating through collisionless or slightly collisional plasmas or through external electric or magnetic fields. Particle motion is followed via a coordinate “window” in the laboratory frame that moves at the speed of light. This scheme allows us to model only the immediate vicinity of the beam. Because no information can move in the forward direction in these coordinates, particle and field data can be handled in a simple way that allows for very large scale simulations. A mapping scheme has been implemented that, with corrections to Maxwell's equations, allows the inclusion of bends in the simulation system.

scholarly journals Ion-channel laser growth rate and beam quality requirements

2018 ◽  
Vol 84 (3) ◽  
Author(s):  
X. Davoine ◽  
F. Fiúza ◽  
R. A. Fonseca ◽  
W. B. Mori ◽  
L. O. Silva
Keyword(s):  
Growth Rate ◽  
Electron Beam ◽  
Ion Channel ◽  
Beam Quality ◽  
Three Dimensional ◽  
Quality Requirements ◽  
Particle In Cell ◽  
Theoretical Predictions ◽  
First Time ◽  
Wakefield Accelerator

In this paper, we determine the growth rate of the exponential radiation amplification in the ion-channel laser, where a relativistic electron beam wiggles in a focusing ion channel that can be created in a wakefield accelerator. For the first time the radiation diffraction, which can limit the amplification, is taken into account. The electron beam quality requirements to obtain this amplification are also presented. It is shown that both the beam energy and wiggler parameter spreads should be limited. Two-dimensional and three-dimensional particle-in-cell simulations of the self-consistent ion-channel laser confirm our theoretical predictions.

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