# Observation of Laser Power Amplification in a Self-Injecting Laser Wakefield Accelerator.

@article{Streeter2018ObservationOL,
title={Observation of Laser Power Amplification in a Self-Injecting Laser Wakefield Accelerator.},
author={M J V Streeter and Stefan Kneip and Michael S. Bloom and Rodolfo Bendoyro and Oleg V. Chekhlov and A. E. Dangor and Andreas D{\"o}pp and Chris J. Hooker and J. Holloway and J. Jiang and Nelson C. Lopes and H. Nakamura and Peter A. Norreys and Charlotte A J Palmer and P. P. Rajeev and J Schreiber and Dan R. Symes and M. Wing and Stuart P. D. Mangles and Z. Najmudin},
journal={Physical review letters},
year={2018},
volume={120 25},
pages={
254801
}
}
• Published 15 October 2017
• Physics
• Physical review letters
We report on the depletion and power amplification of the driving laser pulse in a strongly driven laser wakefield accelerator. Simultaneous measurement of the transmitted pulse energy and temporal shape indicate an increase in peak power from 187±11  TW to a maximum of 318±12  TW after 13 mm of propagation in a plasma density of 0.9×10^{18}  cm^{-3}. The power amplification is correlated with the injection and acceleration of electrons in the nonlinear wakefield. This process is modeled by…
12 Citations

## Figures from this paper

Laser Wakefield Accelerators: Plasma Wave Growth and Acceleration
Laser wakefield accelerators are now becoming established as indispensable laboratory tools. This is because of their ability to produce high energy electron beams in compact configurations. Here we
Polarization dependent beam pointing jitter in laser wake field accelerators
• Physics
• 2022
We present experimental results, which show a laser polarization dependent contribution to electron beam pointing jitter in laser wakefield accelerators (LWFA). We develop a theoretical model for the
Compton recoil effects in staging of laser wakefield accelerators
• Physics
• 2020
Laser plasma accelerators capable of generating >10 GeV electron beams may require plasma mirrors to remove undepleted laser energy at the end of each accelerator stage. Near the plasma mirror
Photon deceleration in plasma wakes generates single-cycle relativistic tunable infrared pulses
• Z. Nie
• Physics
Nature Communications
• 2020
The authors show the generation of single-cycle tunable infrared pulses using strong density gradients associated with laser-produced wakes in plasmas, and demonstrate that these pulses can be used to in-situ probe the transient and nonlinear wakes themselves.
Inverse Compton scattering x-ray source from laser electron accelerator in pure nitrogen with 15 TW laser pulses
• Physics
Plasma Physics and Controlled Fusion
• 2018
Using 15 TW laser pulses, we present a systematic investigation on tabletop inverse Compton scattering (ICS) hard x-ray source based on the self-synchronized combination of laser-driven pure nitrogen
Laser-plasma proton acceleration with a combined gas-foil target
• Physics
• 2020
Laser-plasma proton acceleration was investigated in the Target Normal Sheath Acceleration (TNSA) regime using a novel gas-foil target. The target is designed for reaching higher laser intensity at
Bright x-ray radiation from plasma bubbles in an evolving laser wakefield accelerator
• Physics
• 2017
We show that the properties of the electron beam and bright X-rays produced by a laser wakefield accelerator can be predicted if the distance over which the laser self-focuses and compresses prior to
Ultra-short pulse generation from mid-IR to THz range using plasma wakes and relativistic ionization fronts
• Physics
• 2020
This paper discusses numerical and experimental results on frequency downshifting and upshifting of a 10 $\mu$m infrared laser to cover the entire wavelength (frequency) range from $\lambda$=1-150
Hybrid LWFA–PWFA staging as a beam energy and brightness transformer: conceptual design and simulations
• Physics
Philosophical Transactions of the Royal Society A
• 2019
The feasibility and the potential of this concept is shown through exemplary particle-in-cell simulations and preliminary simulation results for a proof-of-concept experiment in Helmholtz-Zentrum Dresden-Rossendorf (Germany) are shown.
Angular streaking of betatron X-rays in a transverse density gradient laser-wakefield accelerator
• Physics
Physics of Plasmas
• 2018
In a plasma with a transverse density gradient, laser wavefront tilt develops gradually due to phase velocity differences in different plasma densities. The wavefront tilt leads to a parabolic

## References

SHOWING 1-10 OF 65 REFERENCES
Complete temporal characterization of asymmetric pulse compression in a laser wakefield.
• Physics
Physical review letters
• 2010
The measured pulse duration decreases linearly with increasing length and density of the plasma, in quantitative agreement with the intensity-dependent group velocity variation in the plasma wave.
Observation of laser-pulse shortening in nonlinear plasma waves.
• Physics
Physical review letters
• 2005
The temporal shortening of an ultraintense laser pulse interacting with an underdense plasma is measured, which shows the laser ponderomotive force excites a wakefield, which, along with relativistic self-phase modulation, broadens the laser spectrum and subsequently compresses the pulse.
Near-GeV acceleration of electrons by a nonlinear plasma wave driven by a self-guided laser pulse.
• Physics
Physical review letters
• 2009
Three-dimensional particle in cell simulations show that the intensity within the guided filament is amplified beyond its initial focused value to a normalized vector potential of a0>6, thus driving a highly nonlinear plasma wave.
Effect of laser-focusing conditions on propagation and monoenergetic electron production in laser-wakefield accelerators.
• Physics
Physical review letters
• 2007
The effect of laser-focusing conditions on the evolution of relativistic plasma waves in laser-wakefield accelerators is studied both experimentally and with particle-in-cell simulations to allow the wakefield to evolve to the correct shape for the production of the monoenergetic electron bunches.
Direct Observation of the Injection Dynamics of a Laser Wakefield Accelerator Using Few-Femtosecond Shadowgraphy.
• Physics
Physical review letters
• 2015
The results show that self-injection of electrons into the first plasma-wave period is induced by a lengthening of thefirst plasma period.
Asymmetric self-phase modulation and compression of short laser pulses in plasma channels.
• Physics
Physical review letters
• 2003
Fully explicit particle-in-cell simulations are applied to the problem and are compared with ponderomotive guiding center simulations to examine local frequency shifts within the pulse and to suggest an experimental diagnostic of plasma waves inside a capillary.
Multi-GeV electron beams from capillary-discharge-guided subpetawatt laser pulses in the self-trapping regime.
• Physics
Physical review letters
• 2014
A detailed comparison between experiment and simulation indicates the sensitivity in this regime of the guiding and acceleration in the plasma structure to input intensity, density, and near-field laser mode profile.
Self-Steepening of intense laser pulses in plasmas
• Physics
• 2007
The self-steepening of laser pulses with intensities in excess of 1018 W cm-2 and with typical durations shorter than 30 fs propagating in underdense plasmas is examined by resorting to the framework
High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding
• Physics
Nature
• 2004
A laser accelerator that produces electron beams with an energy spread of a few per cent, low emittance and increased energy (more than 109 electrons above 80 MeV) and opens the way for compact and tunable high-brightness sources of electrons and radiation.
Measurements of the critical power for self-injection of electrons in a laser wakefield accelerator.
• Physics
Physical review letters
• 2009
A laser wakefield acceleration study has been performed in the matched, self-guided, blowout regime producing 720 +/- 50 MeV quasimonoenergetic electrons with a divergence Deltatheta_{FWHM} of 2.85