High-charge relativistic electron bunches from a kHz laser-plasma accelerator

Gustas, Dominykas; Guénot, Diego; Vernier, Aline; Dutt, Shankar; Böhle, Frederik; López-Martens, Rodrigo; Lifschitz, Agustín; Faure, Jérôme

doi:10.1103/physrevaccelbeams.21.013401

Cited by 50 publications

(40 citation statements)

References 34 publications

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“…Typically, the CEP spans 2π over the phase slippage length L 2π = λ c /(v φ − v g ) ≈ λn c /n e , where n e and n c are the electron plasma density and critical density, respectively. In our typical LWFA experiments 46 , n e /n c ≈ 0.1 and L 2π ≈ 8 μm, that is, ≈10% of our typical target widths. Therefore, the effect of the CEP on electron injection is significant only if the injection length is smaller than L 2π , which therefore requires a very localized injection and places stringent demands on the stability of all other pulse parameters in space, time and energy.…”

Section: Cep Dependence Of Relativistic Lwfamentioning

confidence: 88%

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Relativistic-intensity near-single-cycle light waveforms at kHz repetition rate

et al. 2020

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The development of ultra-intense and ultra-short light sources is currently a subject of intense research driven by the discovery of novel phenomena in the realm of relativistic optics, such as the production of ultrafast energetic particle and radiation beams for applications. It has been a long-standing challenge to unite two hitherto distinct classes of light sources: those achieving relativistic intensity and those with pulse durations approaching a single light cycle. While the former class traditionally involves large-scale amplification chains, the latter class places high demand on the spatiotemporal control of the electromagnetic laser field. Here, we present a light source producing waveformcontrolled 1.5-cycle pulses with a 719 nm central wavelength that can be focused to relativistic intensity at a 1 kHz repetition rate based on nonlinear post-compression in a long hollow-core fiber. The unique capabilities of this source allow us to observe the first experimental indications of light waveform effects in laser wakefield acceleration of relativistic energy electrons.

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Section: Cep Dependence Of Relativistic Lwfamentioning

confidence: 88%

“…4. LWFA of electrons driven by near-single-cycle pulses was demonstrated with a similar setup but without CEP stability 9,46 . The beam is focused into a continuously flowing microscale supersonic nitrogen gas jet using a 90°off-axis f/2 parabola.…”

Section: Cep Dependence Of Relativistic Lwfamentioning

confidence: 99%

Relativistic-intensity near-single-cycle light waveforms at kHz repetition rate

et al. 2020

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“…This should enhance the electron beam shot to shot stability thus permitting a systematic scan of more experimental configurations, such as the use of femtosecond ablation laser or different ablated materials. The results presented in this work could have a strong impact on the development of femtosecond laser wakefield accelerators operating at kHz repletion rates 22 . In such accelerators, technology constraints currently limit the laser energy to a few 10's of mJ thus requiring high-density, small-length gas targets to produce an electron beam.…”

Section: Discussionmentioning

confidence: 81%

Proof-of-Principle Experiment for Nanoparticle-Assisted Laser Wakefield Electron Acceleration

Aniculaesei

Pathak

et al. 2019

Phys. Rev. Applied

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We demonstrate for the first time a proof-of-principle experiment for nanoparticle-assisted laser wakefield acceleration. Nanoparticles generated through laser ablation of an aluminium target were introduced into a helium plasma and used to trigger the injection of electrons into the nonlinear plasma wake excited by an 800 nm wavelength, 1.8 J energy, femtosecond duration pulse laser. High-energy electron beams were produced, observing a significant enhancement of the electron beam energy, energy spread and divergence compared with the case when electrons are self-injected. For instance, the best quality electron bunches presented peak energy up to 338 MeV with a relative energy spread of 4.7% and a vertical divergence of 5.9 mrad. The initial results are very promising and motivate further theoretical and experimental research into developing the nanoparticle-assisted laser wakefield acceleration.

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“…4 Increasing the repetition rate opens up the possibility to significantly improve aforementioned parameters of electron sources and, in addition, enhance the average electron current by several orders of magnitude. [25][26][27][28][29][30][31][32] On the other hand, high repetition rate lasers are currently capable to deliver pulses only at multi-mJ energy level. According to the scaling laws of the blowout regime, 5,12,33 downscaling the LWFA to the mJ level calls for the use of extremely short laser pulses and high density plasmas.…”

Section: Introductionmentioning

confidence: 99%

Wakefield excited by ultrashort laser pulses in near-critical density plasmas

Valenta

Klimo

Grittani

et al. 2019

Laser Acceleration of Electrons, Protons, and Ions V

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Laser wakefield acceleration (LWFA) using high repetition rate mJ-class laser systems brings unique opportunities for a broad range of applications. In order to meet the conditions required for the electron acceleration with lasers operating at lower energies, one has to use high density plasmas and ultrashort pulses. In the case of a few-cycle pulse, the dispersion and the carrier envelope phase effects can no longer be neglected. In this work, the properties of the wake waves generated by ultrashort pulse lasers in near-critical density plasmas are investigated. The results obtained may lead to enhancement of the quality of LWFA electron beams using kHz laser systems.

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High-charge relativistic electron bunches from a kHz laser-plasma accelerator

Cited by 50 publications

References 34 publications

Relativistic-intensity near-single-cycle light waveforms at kHz repetition rate

Relativistic-intensity near-single-cycle light waveforms at kHz repetition rate

Proof-of-Principle Experiment for Nanoparticle-Assisted Laser Wakefield Electron Acceleration

Wakefield excited by ultrashort laser pulses in near-critical density plasmas

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