Publisher's Note: Effect of quantum correction on the acceleration and delayed heating of plasma blocks [Phys. Rev. E<b>85</b>, 036404 (2012)]

Hora, Heinrich; Sadighi‐Bonabi, R.; Yazdani, Elnaz; Afarideh, H.; Nafari, F.; Ghorannevis, M.

doi:10.1103/physreve.85.039908

Cited by 4 publications

(3 citation statements)

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“…From the physical point of view, by increasing laser beam intensity, the term ν ω / ei , has no significant impact and the laser beam can propagate through plasma without transferring its energy to plasma electrons. This result that the absorption coefficient decreases with increasing of laser intensity is confirmed by results of analytical [34] and numerical elaborations [35].…”

Section: Collisional Isothermal Plasmassupporting

confidence: 72%

Absorption of short laser pulses in underdense plasma by considering ohmic heating and ponderomotive force effects

Ettehadi-Abari

Sedaghat

Shokri

et al. 2015

Plasma Phys. Control. Fusion

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The effect of the non-relativistic ponderomotive force in the interaction of an intense laser pulse with isothermal and non-isothermal underdense collisional plasmas is studied. In this work by considering the ohmic heating of plasma electrons and the ponderomotive force, the nonlinear dielectric permittivity of the plasma medium is obtained and the equation of electromagnetic wave propagation is solved. It is shown that due to the effect of the ponderomotive force in both isothermal and non-isothermal plasmas, the increasing of laser pulse intensity leads to the steepening of the electron density profile and the narrowing of electron bunching. Since the ponderomotive force modifies the electron density and temperature distribution, the spatial damping rate of laser energy and the absorption coefficient are obtained in the collisional regime of isothermal and non-isothermal plasmas. It is shown that in these plasmas, the amplitude of the electric field is increased by increasing laser pulse energy while their wavelength is decreased. Furthermore, by increasing laser pulse intensity, the absorption coefficient is decreased strongly.

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Section: Collisional Isothermal Plasmassupporting

confidence: 72%

Absorption of short laser pulses in underdense plasma by considering ohmic heating and ponderomotive force effects

Ettehadi-Abari

Sedaghat

Shokri

et al. 2015

Plasma Phys. Control. Fusion

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“…This result that with increasing the laser intensity, the absorption coefficient decreases, is confirmed by the results of analytical and numerical elaborations. [35,36]…”

Section: Effects Of External Magnetic Field and Laser Intensitymentioning

confidence: 99%

Influence of plasma inhomogeneity and ohmic heating on the nonlinear absorption of intense laser pulse in collisional magnetized plasma

Fallah,

Khooniki,

Khorashadizadeh

et al. 2023

Contributions to Plasma Physics

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The nonlinear absorption in the interaction of an intense laser pulse with a collisional magnetized plasma is studied by considering the effects of plasma inhomogeneity, ohmic heating, and ponderomotive force. For this purpose, we obtain the plasma electron density, the effective dielectric permittivity, and the wave equation using the Maxwell and hydrodynamic equations and solve this equation by the Runge–Kutta numerical method. The results are shown that by increasing the plasma inhomogeneity, the inverse bremsstrahlung absorption coefficient is increased, and also the density ramp parameter and its sign can affect more the absorption coefficient than the temperature ramp parameter . However, when the initial electron density and temperature increase, the laser field amplitude and the absorption coefficient are increased and the spatial damping rate of the laser pulse becomes highly peaked inside the plasma. It is shown by increasing laser pulse energy, the nonlinear bremsstrahlung absorption coefficient is decreased significantly. The results also indicate that by increasing the external magnetic field, the dielectric permittivity is decreased while the laser energy spatial damping, and the absorption coefficient are increased. Moreover, it is found that by considering the ohmic heating effect, the electrons absorb further energy from the fields and consequently the nonlinear absorption is increased.

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“…The propagation of such intense short laser pulses has been investigated for various plasma conditions [2][3][4][5]. Production of energetic particle beams, such as quasi-monoenergetic electrons and ion blocks, has been reported [6][7][8][9][10][11]. The velocity of energetic electrons can be reduced through interactions with atomic electrons in high-Z materials, resulting in X-ray creation.…”

Section: Introductionmentioning

confidence: 98%

Investigation by simulation of X-ray beams produced via interactions of suitable quasi-monoenergetic electrons with solid targets

Nikzad

Ehtesami-sarabi

2014

Journal of the Korean Physical Society

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X-ray generation by interactions of quasi-monoenergetic electrons with solid lead targets is studied. Various electron energy spectra generated by a laser-plasma accelerator are employed to generate Bremsstrahlung and characteristic X-rays. These X-ray photons are simulated by using the Monte Carlo N-Particle Transport Code (MCNP). The present work is mainly focused on exploring the influence of two parameters of the electron profile, the peak energy (Ep) and the pulse width (ΔE), on X-ray generation. If an electron source with higher Ep and smaller ΔE is used, the efficiency of X-ray creation is found to be increased in thick targets. However, in thin samples, the electron profile with lower Ep and larger ΔE dominates.

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Publisher's Note: Effect of quantum correction on the acceleration and delayed heating of plasma blocks [Phys. Rev. E85, 036404 (2012)]

Cited by 4 publications

References 0 publications

Absorption of short laser pulses in underdense plasma by considering ohmic heating and ponderomotive force effects

Absorption of short laser pulses in underdense plasma by considering ohmic heating and ponderomotive force effects

Influence of plasma inhomogeneity and ohmic heating on the nonlinear absorption of intense laser pulse in collisional magnetized plasma

Investigation by simulation of X-ray beams produced via interactions of suitable quasi-monoenergetic electrons with solid targets

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