Laser wakefield acceleration of supershort electron bunches in guiding structures

Andreev, N. E.; Kuznetsov, S. V.; Cros, B.; Фортов, В. Е.; Maynard, G.; Mora, P.

doi:10.1088/0741-3335/53/1/014001

Cited by 8 publications

(4 citation statements)

References 23 publications

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“…Under these conditions, all plasma electrons immediately behind the laser pulse are expelled by the ponderomotive force (the so-called bubble regime, Fig. 5.10) [46, 169,196], and the wake wave in the wave-breaking regime entrains the small fraction of background electrons and accelerates them with record acceleration rates [15,72,116,132,153,171,175,192].…”

Section: Laser-plasma Acceleration Of Charged Particlesmentioning

confidence: 99%

Technical Applications of the Physics of High Energy Densities

Фортов¹

2016

Extreme States of Matter

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Section: Laser-plasma Acceleration Of Charged Particlesmentioning

confidence: 99%

Technical Applications of the Physics of High Energy Densities

Фортов¹

2016

Extreme States of Matter

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“…In solids, the mechanism strongly depends on the gradients of the pre-plasma on the target surface and can be the vacuum/Brunel [7], resonant absorption in critical density, the ponderomotive and the (J×B) mechanism of acceleration [8,9] or stochastic heating [10][11][12][13] etc. Laser interaction with low density gas targets provides an effective acceleration of electrons to high energies in the wakefields generated in preformed plasma channels [14][15][16]. Great results have been achieved in the generation of monoenergetic electron beams.…”

Section: Introductionmentioning

confidence: 99%

“…Laser interaction with low density gas targets provides effective acceleration of electrons to high energies in the wakefields generated in plasma channels [14][15][16]. Great results were achieved in generation of monoenergetic electron beams with energies from hundreds of MeV up to several GeV in experiments on interaction of relativistic laser pulses with low density gas jets and capillary plasmas, see e.g.…”

Section: Introductionmentioning

confidence: 99%

Interaction of relativistically intense laser pulses with long-scale near critical plasmas for optimization of laser based sources of MeV electrons and gamma-rays

et al. 2019

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Experiments were performed to study electron acceleration by intense sub-picosecond laser pulses propagating in sub-mm long plasmas of near critical electron density (NCD). Low density foam layers of 300-500 μm thickness were used as targets. In foams, the NCD-plasma was produced by a mechanism of super-sonic ionization when a well-defined separate ns-pulse was sent onto the foamtarget forerunning the relativistic main pulse. The application of sub-mm thick low density foam layers provided a substantial increase of the electron acceleration path in a NCD-plasma compared to the case of freely expanding plasmas created in the interaction of the ns-laser pulse with solid foils. The performed experiments on the electron heating by a 100 J, 750 fs short laser pulse of 2-5×10 19 W cm −2 intensity demonstrated that the effective temperature of supra-thermal electrons increased from 1.5-2 MeV in the case of the relativistic laser interaction with a metallic foil at high laser contrast up to 13 MeV for the laser shots onto the pre-ionized foam. The observed tendency towards a strong increase of the mean electron energy and the number of ultra-relativistic laseraccelerated electrons is reinforced by the results of gamma-yield measurements that showed a 1000fold increase of the measured doses. The experiment was supported by 3D-PIC and FLUKA simulations, which considered the laser parameters and the geometry of the experimental set-up. Both, measurements and simulations showed a high directionality of the acceleration process, since the strongest increase in the electron energy, charge and corresponding gamma-yield was observed close to the direction of the laser pulse propagation. The charge of super-ponderomotive electrons with energy above 30 MeV reached a very high value of 78 nC.

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“…The non-linear interaction between intense lasers and plasmas has important applications in the fields of charged particle acceleration in the plasma wake-field [1][2][3][4][5], laser fusion [6,7], laser-plasma channeling [8,9], generation of high-order harmonics [10,11], x-ray lasers [12,13], etc Modulation instability (MI) is one of the fundamental phenomena in the non-linear interaction between intense laser pulses and plasmas [14][15][16]. When an intense laser pulse propagates in plasmas, the ponderomotive force of the laser stimulates a low-frequency perturbation of the electron density.…”

Section: Introductionmentioning

confidence: 99%

Modulational instability of ultraintense laser pulses in electron-positron-ion plasmas including vacuum polarization effect

Luo

Wang

2020

Plasma Phys. Control. Fusion

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A non-linear equation for describing the dynamics of slowly varying envelope of ultra-intense lasers in electron-positron-ion plasmas is derived, taking into account the vacuum polarization effect. Then the modulation instability of ultra-intense laser pulses in the plasmas is investigated. Theoretical results show that the growth rate of modulation instability is originated from the relativistic ponderomotive force of lasers and the vacuum polarization effect. In the regime of different physical parameters, there is an interplay of the two effects. The dependence of the growth rate on the intensity of lasers, the temperature of electrons (positrons), the component of plasmas and the vacuum polarization effect is numerically studied.

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Laser wakefield acceleration of supershort electron bunches in guiding structures

Cited by 8 publications

References 23 publications

Technical Applications of the Physics of High Energy Densities

Technical Applications of the Physics of High Energy Densities

Interaction of relativistically intense laser pulses with long-scale near critical plasmas for optimization of laser based sources of MeV electrons and gamma-rays

Modulational instability of ultraintense laser pulses in electron-positron-ion plasmas including vacuum polarization effect

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