Enhanced x-rays from resonant betatron oscillations in laser wakefield with external wigglers

Zhang, Z M; Zhang, B; Wang, Hong; Yu, M. Y.; Deng, Zhigang; Jiang, Teng; He, Simin; Gu, Yu

doi:10.1088/0741-3335/58/10/105009

Cited by 8 publications

(6 citation statements)

References 34 publications

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“…Here, a 2D particle-in-cell (PIC) simulation code OPIC [32] was used to investigate the process of an ultraintense laser (10 22 W/cm 2 ) irradiating a solid CH target with different preplasma scale lengths. A QED model is included in the code, which takes into account QED effects of the synchrotron radiation of γ-rays and the Breit-Wheeler electron-positron pair production using a Monte Carlo algorithm.…”

Section: Simulation Setupmentioning

confidence: 99%

Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma

Wang

Zhang

et al. 2020

High Pow Laser Sci Eng

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In the laser plasma interaction of quantum electrodynamics (QED)-dominated regime, γ-rays are generated due to synchrotron radiation from high-energy electrons traveling in a strong background electromagnetic field. With the aid of 2D particle-in-cell code including QED physics, we investigate the preplasma effect on the γ-ray generation during the interaction between an ultraintense laser pulse and solid targets. We found that with the increasing preplasma scale length, the γ-ray emission is enhanced significantly and finally reaches a steady state. Meanwhile, the γ-ray beam becomes collimated. This shows that, in some cases, the preplasmas will be piled up acting as a plasma mirror in the underdense preplasma region, where the γ-rays are produced by the collision between the forward electrons and the reflected laser fields from the piled plasma. The piled plasma plays the same role as the usual reflection mirror made from a solid target. Thus, a single solid target with proper scale length preplasma can serve as a manufactural and robust γ-ray source.

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Section: Simulation Setupmentioning

confidence: 99%

Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma

Wang

Zhang

et al. 2020

High Pow Laser Sci Eng

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“…Several recent studies suggest methods for enhancing betatron radiation emission, mostly based on the increase of the betatron oscillation amplitude. This can be achieved by an axial magnetic field, either self-generated or external 17 , 18 ; by a delayed modulation laser pulse 19 ; by the interaction of the electron beam with a high intensity optical lattice formed by the superposition of two transverse laser pulses 20 ; by using structured laser pulses 21 ; or by the interaction of electrons with the tail of the plasma wave drive pulse 22 – 25 .…”

Section: Introductionmentioning

confidence: 99%

Attosecond betatron radiation pulse train

Horný

Krůs

Yan

et al. 2020

Sci Rep

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High-intensity X-ray sources are essential diagnostic tools for science, technology and medicine. Such X-ray sources can be produced in laser-plasma accelerators, where electrons emit short-wavelength radiation due to their betatron oscillations in the plasma wake of a laser pulse. Contemporary available betatron radiation X-ray sources can deliver a collimated X-ray pulse of duration on the order of several femtoseconds from a source size of the order of several micrometres. In this paper we demonstrate, through particle-in-cell simulations, that the temporal resolution of such a source can be enhanced by an order of magnitude by a spatial modulation of the emitting relativistic electron bunch. The modulation is achieved by the interaction of the that electron bunch with a co-propagating laser beam which results in the generation of a train of equidistant sub-femtosecond X-ray pulses. The distance between the single pulses of a train is tuned by the wavelength of the modulation laser pulse. The modelled experimental setup is achievable with current technologies. Potential applications include stroboscopic sampling of ultrafast fundamental processes.

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“…Several recent studies suggest methods for enhancing betatron radiation emission, mostly based on the increase of the betatron oscillation amplitude. This can be achieved by an axial magnetic field, either self-generated or external [17,18]; by a delayed modulation laser pulse [19]; by the interaction of the electron beam with a high intensity optical lattice formed by the superposition of two transverse laser pulses [20]; by using structured laser pulses [21]; or by the interaction of electrons with the tail of the plasma wave drive pulse [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Attosecond betatron radiation pulse train

Horný,

Krůs,

Fülop

2020

Preprint

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High-intensity X-ray sources are essential diagnostic tools for science, technology and medicine. Such X-ray sources can be produced in laser-plasma accelerators, where electrons emit shortwavelength radiation due to their betatron oscillations in the plasma wake of a laser pulse. Contemporary available betatron radiation X-ray sources can deliver a collimated X-ray pulse of duration on the order of several femtoseconds from a source size of the order of several micrometres. In this paper we demonstrate, through particle-in-cell simulations, that the temporal resolution of such a source can be enhanced by an order of magnitude by a spatial modulation of the emitting relativistic electron bunch. The modulation is achieved by the interaction of the that electron bunch with a co-propagating laser beam which results in the generation of a train of equidistant sub-femtosecond X-ray pulses. The distance between the single pulses of a train is tuned by the wavelength of the modulation laser pulse. The modelled experimental setup is achievable with current technologies.Potential applications include stroboscopic sampling of ultrafast fundamental processes.

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Enhanced x-rays from resonant betatron oscillations in laser wakefield with external wigglers

Cited by 8 publications

References 34 publications

Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma

Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma

Attosecond betatron radiation pulse train

Attosecond betatron radiation pulse train

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