MeV electron acceleration at 1 kHz with &lt;10 mJ laser pulses

Salehi, Fatholah; Goers, Andy; Hine, George; Feder, Linus; Kuk, Donghoon; Miao, Bo; Woodbury, Daniel; Kim, Ki-Yong; Milchberg, H. M.

doi:10.1364/fio.2017.fm2b.2

Cited by 9 publications

(19 citation statements)

References 8 publications

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“…Collapse is arrested by plasma blowout-where electrons are expelled by the pulse to form a highly nonlinear plasma wake-and subsequent injection of background electrons into the wakefield can accelerate them to relativistic energies. Laser plasma acceleration experiments relying on self-focusing have usually required large, multiterawatt lasers.Recently we demonstrated that very high density, cryogenically cooled gas jets enable near-critical density laser-plasma interaction for Ti:Sapphire lasers at λ=0.8µm, lowering the threshold for relativistic self-focusing and allowing sub-terawatt pulses to drive highly nonlinear plasma waves in the self-modulated laser wakefield (SM-LWFA) regime [11,12]. In this Letter we demonstrate, for the first time, laser wakefield acceleration using femtosecond mid-IR laser pulses (λ=3.9µm).…”

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confidence: 99%

“…Recently we demonstrated that very high density, cryogenically cooled gas jets enable near-critical density laser-plasma interaction for Ti:Sapphire lasers at λ=0.8µm, lowering the threshold for relativistic self-focusing and allowing sub-terawatt pulses to drive highly nonlinear plasma waves in the self-modulated laser wakefield (SM-LWFA) regime [11,12]. In this Letter we demonstrate, for the first time, laser wakefield acceleration using femtosecond mid-IR laser pulses (λ=3.9µm).…”

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confidence: 99%

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Laser wakefield acceleration with mid-IR laser pulses

et al. 2018

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We report on, to the best of our knowledge, the first results of laser plasma wakefield acceleration driven by ultrashort mid-infrared (IR) laser pulses (λ=3.9 μm, 100 fs, 0.25 TW), which enable near- and above-critical density interactions with moderate-density gas jets. Relativistic electron acceleration up to ∼12 MeV occurs when the jet width exceeds the threshold scale length for relativistic self-focusing. We present scaling trends in the accelerated beam profiles, charge, and spectra, which are supported by particle-in-cell simulations and time-resolved images of the interaction. For similarly scaled conditions, we observe significant increases in the accelerated charge, compared to previous experiments with near-infrared (λ=800 nm) pulses.

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Laser wakefield acceleration with mid-IR laser pulses

et al. 2018

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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.…”

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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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“…Over the past decade, there have been considerable efforts to address this quest for electron acceleration using high-repetition-rate multi-mJ lasers interacting with solid targets [17], gas targets [18][19][20], or liquid targets [21]. However, the energies of the accelerated electrons are limited to the 100 keV to 3 MeV range.…”

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Generation of 100-MeV Attosecond Electron Bunches with Terawatt Few-Cycle Laser Pulses

et al. 2021

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Laser-wakefield acceleration has been demonstrated to be a promising technique for compact electron accelerators. However, it is still challenging to achieve high-quality 100-MeV electron bunches of sub-femtosecond duration with current techniques. Here, we present and numerically demonstrate an efficient scheme to produce such high-energy tunable ultrashort electron bunches, which is achieved by the use of a nonlinear wakefield driven by a terawatt few-cycle laser pulse in a new structure of plasma channel. With the driving laser pulse energy of 25mJ only, the resulting electron bunch can reach 101 MeV with 7.8 pC charge, ~4 mrad divergence, ~3% energy spread, energy efficiency above 3%, and a duration of hundreds of attoseconds. As such laser pulses may be obtained with a kilohertz repetition rate and high stability, our scheme could be interesting for ultrafast science and accelerator community.

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MeV electron acceleration at 1 kHz with <10 mJ laser pulses

Cited by 9 publications

References 8 publications

Laser wakefield acceleration with mid-IR laser pulses

Laser wakefield acceleration with mid-IR laser pulses

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

Generation of 100-MeV Attosecond Electron Bunches with Terawatt Few-Cycle Laser Pulses

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