Numerical modeling of multi-GeV laser wakefield electron acceleration inside a dielectric capillary tube

Paradkar, Bhooshan S.; Cros, B.; Mora, P.; Maynard, G.

doi:10.1063/1.4819718

Cited by 22 publications

(18 citation statements)

References 35 publications

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“…Particle-In-Cell codes (WAKE-EP 24 and Calder-Circ 25 ) were used to model the propagation of the NIR pulse throughout the plasma channel 20 . The resulting 3D electron density and Kr 8+ abundance were fed to our 3D Maxwell-Bloch code Dagon 21 .…”

Section: Simulationsmentioning

confidence: 99%

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

et al. 2020

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Understanding the behaviour of matter under conditions of extreme temperature, pressure, density and electromagnetic fields has profound effects on our understanding of cosmologic objects and the formation of the universe. Lacking direct access to such objects, our interpretation of observed data mainly relies on theoretical models. However, such models, which need to encompass nuclear physics, atomic physics and plasma physics over a huge dynamic range in the dimensions of energy and time, can only provide reliable information if we can benchmark them to experiments under well-defined laboratory conditions. Due to the plethora of effects occurring in this kind of highly excited matter, characterizing isolated dynamics or obtaining direct insight remains challenging. High-density plasmas are turbulent and opaque for radiation below the plasma frequency and allow only near-surface insight into ionization processes with visible wavelengths. Here, the output of a high-harmonic seeded laser-plasma amplifier using eight-fold ionized krypton as the gain medium operating at a 32.8 nm wavelength is ptychographically imaged. A complex-valued wavefront is observed in the extreme ultraviolet (XUV) beam with high resolution. Ab initio spatio-temporal Maxwell–Bloch simulations show excellent agreement with the experimental observations, revealing overionization of krypton in the plasma channel due to nonlinear laser-plasma interactions, successfully validating this four-dimensional multiscale model. This constitutes the first experimental observation of the laser ion abundance reshaping a laser-plasma amplifier. The presented approach shows the possibility of directly modelling light-plasma interactions in extreme conditions, such as those present during the early times of the universe, with direct experimental verification.

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Section: Simulationsmentioning

confidence: 99%

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

et al. 2020

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“…Metal capillaries can be considered as a special case of plasma-walled capillaries, as the metal walls behave like a cold dense plasma with a sharp boundary. Laser propagation in dielectric capillaries is understood quite well [20,21], and experimental observations agree with the theory [13,22]. Plasma-walled capillaries are more difficult for theoretical analysis, the available theory [23][24][25] is not experimentally verified yet, the experiments were performed in the sub-picosecond regime [10,18,19], and no experimental data are available for femtosecond pulses.…”

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confidence: 84%

Guiding femtosecond high-intensity high-contrast laser pulses by copper capillaries

et al. 2015

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Propagation of high-intensity, high-contrast (<10−8), 50 fs laser pulses through triangular copper capillaries is experimentally studied. The relative transmission through 20-mm-long, about 50 μm wide capillaries is directly measured to be 70% for input intensities up to 1017 W/cm2. The copper reflectivity in vacuum, helium, and air is measured in the intensity range of 1010–1017 W/cm2. No reflectivity decrease in vacuum and helium is observed, which leads to the conclusion that copper capillary waveguides can efficiently guide laser pulses of intensities greater than 1019 W/cm2 on the capillary axis (that corresponds to 1017 W/cm2 on the walls). The reduction of the transmission efficiency to zero after a number of transmitted pulses is observed, which is caused by plug formation inside the capillary. The dependence of the capillary lifetime on the pulse energy is measured.

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“…Ingenious laser-plasma experiments have been set up, demonstrating first the possibility to accelerate electrons to hundreds of MeV [3,4,5], then to the symbolic threshold of 1 GeV [6], and then to 2 [7], 3 [8], 4 [9], and very recently 8 GeV [10]. These experimental results are supported by simulations with 3D particle-in-cell (PIC) codes, which further explore the acceleration up to 10 GeV [11], hundreds of GeV [12], or even 1 TeV [13], assuming the achievement of a good enough electron injection. Those experimental and theoretical results have been obtained with a certain care about either the charge or else the beam quality in terms of energy dispersion and emittance, but the latter are still far from those obtained in rf accelerators.…”

Section: Introductionmentioning

confidence: 92%

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

Nghiem¹,

Aßmann²,

Beck³

et al. 2020

Phys. Rev. Accel. Beams

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From plasma-wakefield acceleration as a physics experiment toward a plasma-based accelerator as a user facility, the beam physics issues remaining to be solved are still numerous. Providing beams with high energy, charge, and quality simultaneously, not only within the plasma but also at the user doorstep itself, is the main concern. Despite its tremendous efficiency in particle acceleration, the wakefield displays a complex 3D profile which, associated to the beam-loading field induced by the accelerated beam itself, makes the acceleration of high charge to high energy often incompatible with high beam quality. Beam extraction from the plasma without quality degradation for a transfer either to the next plasma stage or to the user application is another difficulty to consider. This article presents the substantial studies carried out and the different innovative methods employed for tackling all these different issues. Efforts focused on achieving the challenging beam parameters targeted by the EuPRAXIA accelerator facility project. The lessons learned at the end of these in-depth simulations and optimizations are highlighted. The sensitivity to different error sources is also estimated to point out the critical components of such an accelerator. Finally, the needs in terms of laser and plasma parameters are provided.

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Numerical modeling of multi-GeV laser wakefield electron acceleration inside a dielectric capillary tube

Cited by 22 publications

References 35 publications

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

Nonlinear ionization dynamics of hot dense plasma observed in a laser-plasma amplifier

Guiding femtosecond high-intensity high-contrast laser pulses by copper capillaries

Toward a plasma-based accelerator at high beam energy with high beam charge and high beam quality

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