Cavity generation and quasi-monoenergetic electron generation in laser-plasma interaction

Zobdeh, P.; Sadighi‐Bonabi, R.; Afarideh, H.

doi:10.1134/s1547477109050094

Cited by 5 publications

(5 citation statements)

References 33 publications

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“…It is possible to generalize this model to a shape of an ellipsoid. Electric scalar potential j and magnetic vector potential A=(A x , 0, 0) of the ion cavity can be in this case described by the following relations [37] Electron density at 1.1ps and 1.5ps, respectively. The instantaneous evolution of transverse radii and the drop of R a in 1.1ps is explained by the transformation of a bubble as a whole, which can be seen by comparing panels (c) where the original outer bubble dominates and (d) where the outer bubble decays.…”

Section: Single Particle Motion In Evolving Bubblementioning

confidence: 99%

Optical injection dynamics in two laser wakefield acceleration configurations

Horný

Mašlárová

Petržı́lka

et al. 2018

Plasma Phys. Control. Fusion

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The injection and acceleration dynamics of electron bunches generated by two different optical injection mechanisms, the injection by an orthogonally crossing pulse with perpendicular polarization and injection by a copropagating preceding pulse, are studied by means of 2D numerical particle-in-cell (PIC) simulations. The effect of the ion cavity (bubble) shape variations induced by injection pulses on the electron bunch formation and observable parameters is explored for early injection and acceleration phases. Even if both schemes have three different injection regions, from which three independent electron sub-bunches emerge, the final merged electron bunch does not exhibit a significant substructure in studied parameters as transverse and longitudinal emittance. The 2D PIC simulations also reveal that the final electron bunch parameters are mainly affected by the spatial charge distribution of individual subbunches. Further, the model of the electric and magnetic fields within the slowly evolving ellipsoidal bubble is derived. The electron trajectories in acceleration later stages are analyzed by employing this model for the dynamic changes in the bubble size observed in PIC simulations.

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Section: Single Particle Motion In Evolving Bubblementioning

confidence: 99%

Optical injection dynamics in two laser wakefield acceleration configurations

Horný

Mašlárová

Petržı́lka

et al. 2018

Plasma Phys. Control. Fusion

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“…The main defect of this model is assumptions on constancy of angular momentum (l). If (l) is constant, we obviously see from Equation (2b) that ponderomotive force E p is zero and it disappears completely and the solution to the central force of Equation (2a) is an ellipsoid as in (8). Therefore, in this section, we derive the correct solution to Maxwell's equations.…”

Section: The Fields Inside the Spheroid Cavitymentioning

confidence: 86%

Accurate monoenergetic electron parameters of laser wakefield in a bubble model

Raheli

Rahmatallahpur

2012

Radiation Effects and Defects in Solids

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“…In this work we improve the previous models and resolve the ambiguity in the shape of the potential by correcting equations in the previous spherical model [4,5] and the ellipsoidal model. [13,14] The spherical models in Refs. [4] and [5] are incomplete due to different coefficients in Eqs.…”

Section: The Fields Inside the Spheroid Cavitymentioning

confidence: 99%

“…Different models of electron acceleration are considered and examined to achieve a mono-energetic electron and ion beam, among which the bubble regime is one of the most recent methods used in laser-plasma accelerators. [4][5][6][7][8][9][10][11][12][13][14][15] In the laser wake-field acceleration (LWFA) scheme enabled by a short laser pulse whose frequency (ω 0 ) is much larger than the plasma frequency (ω p ), the bubble is created due to the ponderomotive force. As an intense pulse propagates through an underdense plasma with ω 0 ω p , the ponderomotive force associated with the laser envelope expels electrons from the region of the laser pulse and excites highly nonlinear, relativistic electron plasma waves.…”

Section: Introductionmentioning

confidence: 99%

Monoenergetic electron parameters in a spheroid bubble model

2013

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A reliable analytical expression for the potential of plasma waves with phase velocities near the speed of light is derived. The presented spheroid cavity model is more consistent than the previous spherical and ellipsoidal models and it explains the mono-energetic electron trajectory more accurately, especially at the relativistic region. The maximum energy of electrons is calculated and it is shown that the maximum energy of the spheroid model is less than that of the spherical model. The electron energy spectrum is also calculated and it is found that the energy distribution ratio of electrons ΔE/E for the spheroid model under the conditions reported here is half that of the spherical model and it is in good agreement with the experimental value in the same conditions. As a result, the quasi-mono-energetic electron output beam interacting with the laser plasma can be more appropriately described with this model.

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Cavity generation and quasi-monoenergetic electron generation in laser-plasma interaction

Cited by 5 publications

References 33 publications

Optical injection dynamics in two laser wakefield acceleration configurations

Optical injection dynamics in two laser wakefield acceleration configurations

Accurate monoenergetic electron parameters of laser wakefield in a bubble model

Monoenergetic electron parameters in a spheroid bubble model

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