Electron cavitation and acceleration in the wake of an ultraintense, self-focused laser pulse

Mora, P.; Antonsen, Thomas M.

doi:10.1103/physreve.53.r2068

Cited by 146 publications

(106 citation statements)

References 24 publications

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“…Finally, in the past decade, prior to which time most of the experimental accelerated electrons were characterized by an exponential energy distribution 2,3 , high quality monoenergetic electron beams were reported by many groups [4][5][6][7][8][9][10][11][12] . Most of these experiments, were conducted in the so-called blowout regime or "bubble" regime, identified in many simulations and theoretical analyses before [13][14][15][16][17][18][19][20] where the electrons are expelled radially from the beam axis by the transverse ponderomotive force of the laser, which creates a three dimensional (3D) cavity (the "bubble") empty of electrons.…”

Section: Introductionmentioning

confidence: 99%

Giga-electronvolt electrons due to a transition from laser wakefield acceleration to plasma wakefield acceleration

Masson-Laborde

Ali

et al. 2014

Physics of Plasmas

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We show through experiments that a transition from laser wakefield acceleration (LWFA) regime to a plasma wakefield acceleration (PWFA) regime can drive electrons up to energies close to the GeV level. Initially, the acceleration mechanism is dominated by the bubble created by the laser in the nonlinear regime of LWFA, leading to an injection of a large number of electrons. After propagation beyond the depletion length, leading to a depletion of the laser pulse, whose transverse ponderomotive force is not able to sustain the bubble anymore, the high energy dense bunch of electrons propagating inside bubble will drive its own wakefield by a PWFA regime. This wakefield will be able to trap and accelerate a population of electrons up to the GeV level during this second stage. Three dimensional (3D) particle-in-cell (PIC) simulations support this analysis, and confirm the scenario.

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Section: Introductionmentioning

confidence: 99%

Giga-electronvolt electrons due to a transition from laser wakefield acceleration to plasma wakefield acceleration

Masson-Laborde

Ali

et al. 2014

Physics of Plasmas

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“…The optimal initial phase, preventing unfavorable evolution scenario (viz. formation of the ROS), is found using the cylindrically symmetric, time-averaged (over a period of laser field oscillations) quasistatic code WAKE [3]. Using these optimal initial conditions, non-quasistatic simulations with the fully explicit, quasi-cylindrical code CALDERCirc [18] yield complete kinetic description of electron beam, demonstrating suppression of continuous injection and increase of final electron energy.…”

Section: Simulation Methodsmentioning

confidence: 99%

“…The hallmark of the regime is full cavitation of electron fluid by the ponderomotive force of a short, relativistically intense laser pulse. The cavity (or "bubble") of electron density encompasses the pulse and guides it over the unperturbed positive ion background until depletion [1,3]. The bubble is a high-quality three-dimensional (3D) electromagnetic accelerating structure.…”

Section: Introductionmentioning

confidence: 99%

Sub-millimeter-scale, 100-MeV-class quasi-monoenergetic laser plasma accelerator based on all-optical control of dark current in the blowout regime

Kalmykov¹,

Davoine²,

Shadwick³

2013

AIP Conference Proceedings

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It is demonstrated that by negatively chirping the frequency of a 20-fs, 15-TW driving laser pulse with an ultrabroad bandwidth (corresponding to a sub-2-cycle transform-limited duration) it is possible to prevent early compression of the pulse into an optical shock, thus reducing expansion of the accelerating plasma bucket (electron density "bubble") and delaying dephasing of self-injected and accelerated electrons. These features help suppress unwanted continuous selfinjection (dark current) in the blowout regime, making possible to use the entire dephasing length to generate lowbackground, quasi-monoenergetic 200-MeV-scale electron beams from sub-mm-length dense plasmas (n e0 =1.3×10 19 cm −3 ).

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“…which formally coincides with the one-dimensional integral of motion (3) [14,26,27]. Electrons can be trapped in the region where wakefield is both accelerating and focusing.…”

Section: B Equation Of Motion Of Bunch Electronsmentioning

confidence: 99%

Trapping, compression, and acceleration of an electron bunch in the nonlinear laser wakefield

Khachatryan

2002

Phys. Rev. E

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A scheme of laser wakefield acceleration, when a relatively rare and long bunch of non-relativistic or weakly-relativistic electrons is initially in front of the laser pulse, is suggested and considered. The motion of test electrons is studied both in the one-dimensional case (1D wakefield) and in the threedimensional laser wakefield excited in a plasma channel. It is shown that the bunch is trapped, effectively compressed both in longitudinal and transverse directions and accelerated to ultra-relativistic energies in the region of first accelerating maximum of the wakefield. The accelerated bunch has sizes much less than the plasma wavelength and relatively small energy spread.

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Electron cavitation and acceleration in the wake of an ultraintense, self-focused laser pulse

Cited by 146 publications

References 24 publications

Giga-electronvolt electrons due to a transition from laser wakefield acceleration to plasma wakefield acceleration

Giga-electronvolt electrons due to a transition from laser wakefield acceleration to plasma wakefield acceleration

Sub-millimeter-scale, 100-MeV-class quasi-monoenergetic laser plasma accelerator based on all-optical control of dark current in the blowout regime

Trapping, compression, and acceleration of an electron bunch in the nonlinear laser wakefield

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