Refluxed electrons direct laser acceleration in ultrahigh laser and relativistic critical density plasma interaction

Wang, Jun; Zhao, Ziqi; Zhu, Bin; Zhang, Z. M.; Cao, Lihua; Zhou, Weimin; Gu, Yuqiu

doi:10.1063/1.4905669

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…Figure 3(a) illustrates the hot electron spectrum for different chirp parameters at 60 T. It is obvious that the electron distribution for negative chirped pulse is unfavorable. The slope of the electron distribution is representative of the effective temperature [24]. As the dashed lines show, the slope of the line related to the positive chirped pulse is higher than that one for unchirped pulse.…”

Section: Chirp Effectmentioning

confidence: 96%

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Hot electron generation enhancement by long duration positive chirped laser pulses

Souri¹,

Sadighi‐Bonabi²

2018

Phys. Scr.

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Interaction of the chirped circularly polarized laser pulse with ramped density plasma is presented by particle-in-cell simulation. The obtained results indicate that the laser penetration depth into the plasma target and hot-electron generation can be improved by chirped induced transparency (CIT). Positive chirped pulses penetrate more deeply in the plasma leading to the hot electron enhancement and improvement of the maximum separation accelerating fields at the rear side of the target. For laser pulse with 150 fs time duration, there is 40% increase in the laser penetration depth in the target and the maximum amount of the electrostatic field is improved by a factor of 5 in the present of optimum chirp parameter. It is also noticed that the effect of CIT is more prevailing for long duration pulses. Penetration depth, electron heating and maximum of the electrostatic fields are promoted significantly by introducing positive chirp to pulses with longer duration. Although, the unchirped laser pulses with intensity lower than the self-induced transparency threshold cannot propagate through the plasma directly, the long duration chirped pulses can compensate low intensities and induce the lasers penetration by irradiating the long positive chirp pulses with suitable intensity.

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Section: Chirp Effectmentioning

confidence: 96%

“…In order to directly accelerate the protons or ions by laser, the laser intensity in order of 10 W cm 24 2…”

Section: > -mentioning

confidence: 99%

Hot electron generation enhancement by long duration positive chirped laser pulses

Souri¹,

Sadighi‐Bonabi²

2018

Phys. Scr.

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Numerical analysis of pulsed magnetic field diffusion dynamics in gold cone target

et al. 2018

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Strong magnetic fields from a few hundred to a thousand tesla have been produced in a laboratory by using high-intensity laser beams. This strong magnetic field in a laboratory becomes a powerful tool to perform experiments in the fields such as laboratory astrophysics and nuclear fusion research. The diffusion dynamics of a pulsed magnetic field in a target is a key phenomenon for experiments with the laser-produced magnetic field. Here, we have developed a two-dimensional (2D) electromagnetic dynamics simulation code with consideration of inductive heating to simulate spatiotemporally resolved 2D profiles of the applied magnetic field in a target. The application of an external kilo-tesla-level magnetic field to a gold-cone-attached target is a promising scheme for the enhancement of heating efficiency of the fast-ignition inertial confinement fusion scheme. Our simulation revealed that the magnetic field heats the gold cone due to the inductive heating and penetrates the gold cone during its pulse duration. The developed simulation code is generally useful for designing and analyzing experiments using a strong magnetic field.

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Refluxed electrons direct laser acceleration in ultrahigh laser and relativistic critical density plasma interaction

Cited by 2 publications

References 26 publications

Hot electron generation enhancement by long duration positive chirped laser pulses

Hot electron generation enhancement by long duration positive chirped laser pulses

Numerical analysis of pulsed magnetic field diffusion dynamics in gold cone target

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