Particle simulation and electron heating effects in plasmas produced by laser pulse

Cao, Lihua; Wen-Wei, Chang; Zong-Wu, Yue

doi:10.1063/1.872732

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…5 Significant attention has been devoted to investigations into such intensive laser pulse absorption in dense plasma. [6][7][8][9] Several mechanisms dominate in the laser-plasma interaction such as resonant absorption, 10,11 vacuum heating, 12 J Â B heating, 13 and stochastic heating. 14 In this paper, only the first two mechanisms should be mainly considered, since we shall focus on the case of oblique incidence of p-polarized laser.…”

Section: Introductionmentioning

confidence: 99%

Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma

Zhuo

et al. 2013

Physics of Plasmas

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An analytical model for laser-plasma interaction during the oblique incidence by an ultrashort ultraintense p-polarized laser on a solid-density plasma is proposed. Both the resonant absorption and not-so-resonant absorption are self-consistently included. Different from the previous theoretical works, the physics of resonant absorption is found to be valid in more general conditions as the steepening of the electron density profile is considered. Even for a relativistic intensity laser, resonant absorption can still exist under certain plasma scale length. For shorter plasma scale length or higher laser intensity, the not-so-resonant absorption tends to be dominant, since the electron density is steepened to a critical level by the ponderomotive force. The laser energy absorption rates for both mechanisms are discussed in detail, and the difference and transition between these two mechanisms are presented. V C 2013 AIP Publishing LLC.

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Section: Introductionmentioning

confidence: 99%

Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma

Zhuo

et al. 2013

Physics of Plasmas

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“…The mechanism is studied in two kinds of preformed underdense plasmas with linearly descending and ascending density profiles by the 2d3v particle-in-cell (PIC) code under a distributed-memory parallel environment [12], which can work more efficiently than the code used in our previous work [13][14][15]. A circularly polarized, Gaussian shape laser pulse with peak intensity 5 × 10 19 W cm −2 , wavelength λ = 1 µm and pulse duration 5T laser , is incident normally on a preformed plasma, corresponding to a cycle time of T laser ∼ 3 fs.…”

Section: Introductionmentioning

confidence: 99%

Electron acceleration by the short pulse laser in inhomogeneous underdense plasmas

Cao

et al. 2004

J. Plasma Phys.

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Electron acceleration by the ponderomotive force of a laser pulse with duration less than the plasma wavelength in inhomogeneous underdense plasmas is studied by two-dimensional relativistic parallel particle-in-cell (PIC) code. Particular attention is paid to the mechanism of electron acceleration associated with the increasing group velocity of the laser pulse. In an underdense plasma layer with linearly descending density profile, the accelerated electrons move together with the laser pulse which propagates with increasing group velocity. In an inhomogeneous pre-plasma with linearly ramping density profile, as the incident laser propagates up the density gradient with decreasing group velocity, ponderomotive acceleration is reduced compared with the uniform pre-plasma. As the reflected laser propagates down the density gradient with increasing group velocity, the ponderomotive acceleration by the reflected laser is more effective due to increasing group velocity of the reflected light and the return currents induced by the incident laser light. Relativistic electrons with multi-tens-MeV energies are generated.

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“…In this paper, we attempt to investigate absorption and relativistic electron heating in plasmas produced by laser pulses with the same peak intensities 10 19 W cm −2 but different durations. The two-dimensional, multi-timescale, fully electromagnetic, and relativistic particle-in-cell (PIC) code (LPI2D), which has been used successfully to study resonant absorption and some physical mechanisms [36][37][38][39][40], will be used to investigate the problem. The dynamics of the plasmas and the analysis of the Fourier frequency spectrum from our simulations indicate that there are different mechanisms of absorption and relativistic electron heating for different durations of laser pulses, which create plasmas with different scale lengths and gradients.…”

Section: Introductionmentioning

confidence: 99%

Relativistic electron heating in laser-produced plasmas

et al. 2001

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Two-dimensional multi-timescale fully electromagnetic relativistic particle simulation is used to investigate relativistic electron heating in laser-produced plasmas. When laser pulses with peak intensities 1019 W cm−2 and different durations (e.g. 118 fs and 442 fs) are incident on overdense plasma slabs with step-like density profiles, the dynamics of plasmas and Fourier frequency spectra from our particle simulations demonstrate distinctly different properties in hot-electron temperatures, absorption, relativistic electron heating, and so on. The particular motions of the critical surfaces are discussed. From the two examples simulated in this paper, it is concluded that the interactions between plasmas and laser pulses with the same intensities and different durations are dominated by different mechanisms, which can lead to dissimilar dynamics of plasmas, relativistic heating, and so on.

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Particle simulation and electron heating effects in plasmas produced by laser pulse

Cited by 10 publications

References 9 publications

Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma

Resonant absorption and not-so-resonant absorption in short, intense laser irradiated plasma

Electron acceleration by the short pulse laser in inhomogeneous underdense plasmas

Relativistic electron heating in laser-produced plasmas

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