High harmonic generation in relativistic laser-plasma interaction
TLDR
In this article, high harmonics generated due to the scattering of relativistic electrons from high intensity laser light is studied in an Nd:glass laser system with a peak intensity of 2×1018 W cm−2 in underdense plasma.Abstract:
High harmonics generated due to the scattering of relativistic electrons from high intensity laser light is studied. The experiments are carried out with an Nd:Glass laser system with a peak intensity of 2×1018 W cm−2 in underdense plasma. It is shown that, at high intensities, when the normalized electric field approaches unity, in addition to the conventional atomic harmonics from bound electrons there is significant contribution to the harmonic spectrum from free electrons. The characteristic signatures of this are found to be the emission of even order harmonics, linear dependence on the electron density, significant amount of harmonics even with circular polarization and a much smaller spatial region over which these harmonics are produced as compared to the atomic case. Imaging of the harmonic beam shows that it is emitted in a narrow cone with a divergence of 2 to 3 degrees.read more
Citations
More filters
Journal ArticleDOI
Femtosecond x rays from laser-plasma accelerators
Sebastien Corde,K. Ta Phuoc,Guillaume Lambert,R. Fitour,Victor Malka,Antoine Rousse,Arnaud Beck,Erik Lefebvre +7 more
TL;DR: In this paper, a unified formalism is presented for the betatron radiation of trapped and accelerated electrons in the so-called bubble regime, the synchrotron radiation of laser-accelerated electrons in usual meter-scale undulators, the nonlinear Thomson scattering from relativistic electrons oscillating in an intense laser field, and the Thomson backscattered radiation of a laser beam by laser accelerated electrons.
Journal ArticleDOI
Strong field interaction of laser radiation
TL;DR: The Virtual Laser-Plasma Laboratory (VLPL) as mentioned in this paper uses particle-in-cell (PIC) codes to simulate real laser-plasma experiments for the first time.
Journal ArticleDOI
Self-focusing of a Hermite-cosh Gaussian laser beam in a magnetoplasma with ramp density profile
TL;DR: In this paper, the authors investigated the early and strong self-focusing of a Hermite-cosh-Gaussian laser beam in magnetoplasma in the presence of density ramp and reported that the diffraction term becomes more dominant over nonlinear term for decentered parameter b = 0.05.
Journal ArticleDOI
Sensitiveness of Decentered Parameter for Relativistic Self-Focusing of Hermite-cosh-Gaussian Laser Beam in Plasma
TL;DR: In this paper, the authors investigated the sensitivity of the decentered parameter for relativistic self-focusing of Hermite-cosh-Gaussian beam in the plasma using Wentzel-Kramers-Brillouin and paraxial ray approximation for mode indices 0, 1 and 2.
Journal ArticleDOI
Enhanced relativistic self-focusing of Hermite-cosh-Gaussian laser beam in plasma under density transition
Vikas Nanda,Niti Kant +1 more
TL;DR: In this article, an early relativistic self-focusing of Hermite-cosh-Gaussian (HChG) beam in the plasmas under density transition has been investigated theoretically using Wentzel-Kramers-Brillouin and paraxial ray approximation.
References
More filters
Journal ArticleDOI
Phase-Matched Generation of Coherent Soft X-rays
A. Rundquist,Charles G. Durfee,Zenghu Chang,Catherine M. Herne,Sterling Backus,Margaret M. Murnane,Henry C. Kapteyn +6 more
TL;DR: Phase-matched harmonic conversion of visible laser light into soft x-rays was demonstrated and the recently developed technique of guided-wave frequency conversion was used to upshift light from 800 nanometers to the range from 17 to 32 nanometers.
Journal ArticleDOI
Classical theory of the scattering of intense laser radiation by free electrons
TL;DR: Thomson theory of arbitrarily intense elliptically polarized plane electromagnetic wave scattering by free electrons, solving electron equations of motion as discussed by the authors, solving electron equation of motion (EoMOM).
Journal ArticleDOI
Nonlinear Thomson scattering of intense laser pulses from beams and plasmas
TL;DR: In this paper, a comprehensive theory is developed to describe the nonlinear Thomson scattering of intense laser fields from beams and plasmas, valid for linearly or circularly polarized incident laser fields of arbitrary intensities and for electrons of arbitrary energies.
Journal ArticleDOI
Experimental observation of relativistic nonlinear Thomson scattering
TL;DR: In this paper, the relativistic Thomson scattering was shown to quiver nonlinearly, moving in figure-of-eight patterns rather than in straight lines, with velocities approaching the speed of light.
Journal ArticleDOI
Electron Acceleration by a Laser Wakefield in a Relativistically Self-Guided Channel
TL;DR: In this paper, a relativistically self-guided channel from an intense ultrashort laser pulse was found to increase the laser propagation distance, decrease the electron beam divergence, and increase the energy of the electrons even though the propagation distance became significantly longer than the conventional dephasing length.