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

Ge, Z. Y.; Yu, Wei; Zhuo, H. B.; Zhou, C. T.; Y., Y.; Yang, X. H.; Yu, Tong-Pu; Zou, D. B.; Luan, Song; Yin, Yan; Shao, F. Q.; Peng, X. J.

doi:10.1063/1.4813254

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…[13][14][15][16][17] In the previous researches, Naumova et al 18 investigated how a p-polarized ultra-intense laser pulse interacting with sharp boundaries of an overdense plasma channel produced electron bunches of attosecond duration. It is shown that, an ultrarelativistic laser pulse focused on the entrance of the channel propagates through the channel and generates attosecond electron beams with an energy of 20-30 MeV.…”

Section: Introductionmentioning

confidence: 99%

Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target

Shao

et al. 2015

Physics of Plasmas

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By using two-dimensional particle-in-cell simulations, we demonstrate enhanced spatially periodic attosecond electron bunches generation with an average density of about 10nc and cut-off energy up to 380 MeV. These bunches are acquired from the interaction of an ultra-short ultra-intense laser pulse with a cone target. The laser oscillating field pulls out the cone surface electrons periodically and accelerates them forward via laser pondermotive force. The inner cone wall can effectively guide these bunches and lead to their stable propagation in the cone, resulting in overdense energetic attosecond electron generation. We also consider the influence of laser and cone target parameters on the bunch properties. It indicates that the attosecond electron bunch acceleration and propagation could be significantly enhanced without evident divergency by attaching a plasma capillary to the original cone tip.

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Section: Introductionmentioning

confidence: 99%

Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target

Shao

et al. 2015

Physics of Plasmas

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“…Two-dimensional (PIC) simulations predict the applications of a fast ignitor mechanism and radiotherapy via ultra-intense laser interaction with an overdense plasma [27]. The physics of resonant absorption of a p-polarized intense laser beam is theoretically presented by Ge et al [28] in solid target plasma. The absorption is very sensitive to the laser intensity and plasma density scale length and is resonant for an incident angle nearly of about 45 • .…”

Section: Introductionmentioning

confidence: 99%

Electron Bernstein wave aided Hermite cosh-Gaussian laser beam absorption in collisional plasma

Varma¹,

Mishra²,

Kumar³

et al. 2023

Laser Phys. Lett.

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In this paper, we theoretically study the electron Bernstein wave aided Hermite-Cosh-Gaussian laser beam absorption in collisional plasma with a static magnetic field. This laser beam may have the potential to couple the pre-existing electron Bernstein wave with the coupled wave frequency ω 1 = ω + ω 0 and wave number k 1 = k + k 0 where ω and ω 0 are the electron Bernstein wave and laser beam frequencies, respectively, and k and k 0 are the electron Bernstein wave and laser beam wave numbers, respectively. The plasma electron oscillatory velocities associated with the coupled wave mode produce the linear and nonlinear current density. An expression for the nonlinear absorption coefficient of an electron Bernstein wave aided Hermite cosh-Gaussian laser beam is analytically derived and more concisely discussed via different relative graphs. The graphical results promise that the absorption coefficient is strongly dependent on Hermite mode index m, beam decentered parameter d associated with the cosh term, laser beam width, laser beam frequency, electron Bernstein wave frequency, electron cyclotron frequency, electron thermal velocity and collisional frequency. Nonlinear coupling, collision phenomena and laser beam decentered parameter (very sensitive parameter) play an important role in absorption processes. The association of a very small electron Bernstein wave frequency with the laser beam causes too much of an increase in the absorption coefficient compared to only the laser beam. This efficient nonlinear absorption process may be applicable to plasma electron heating and the harmonic generation process.

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“…In the laser fusion plasma, the absorption is achieved by several mechanisms including inverse bremsstrahlung absorption (IBA) [13][14][15][16], resonance absorption [17,18] and anomalous absorption [19].…”

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confidence: 99%

Electron-ion inverse bremsstrahlung absorption in magnetized fusion plasma

Oussama

Abdenasser²,

Sid

2021

EPL

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Magneto-inertial fusion (MIF) is an approach for thermonuclear fusion. It consists in applying a strong magnetic field to the inertial-fusion plasma, with the role of the magnetic field being to limit the diffusion of the formed plasma during the impact of an intense laser pulse with a target containing the thermonuclear fuel, as well as the confinement alpha particles produced by the fusion reaction. This allows the reduction of energy loss and improves compression conditions. In this paper we are interested in the study of the electron-ion inverse bremsstrahlung absorption (IBA) of the laser energy in magnetized plasma in the MIF frame. In addition, we apply the derived formula to calculate the absorption in magnetic fusion plasma heated by microwave. We use the Fokker-Planck-Maxwell theory to calculate the IBA explicitly in magnetized plasma. Scaling laws for IBA in MIF plasma and for magnetic confinement plasma are established. The numerical treatment of the model equations shows the influence of the magnetic field and the polarization of the wave on the absorption.

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

Cited by 5 publications

References 24 publications

Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target

Enhanced dense attosecond electron bunch generation by irradiating an intense laser on a cone target

Electron Bernstein wave aided Hermite cosh-Gaussian laser beam absorption in collisional plasma

Electron-ion inverse bremsstrahlung absorption in magnetized fusion plasma

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