Laser Amplification in Strongly-Magnetized Plasma

Abstract

We consider backscattering of laser pulses in strongly-magnetized plasma mediated by kinetic magnetohydrodynamic waves. Magnetized low-frequency scattering, which can occur when the external magnetic field is neither perpendicular nor parallel to the laser propagation direction, provides an instability growth rate higher than Raman scattering and a frequency downshift comparable to Brillouin scattering. In addition to the high growth rate, which allows smaller plasmas, and the 0.1-2\% frequency downshift, which permits a wide range of pump sources, MLF scattering is an ideal candidate for amplification because the process supports an extremely large bandwidth, which particle-in-cell simulations show produces ultrashort durations. Under some conditions, MLF scattering also becomes the dominant spontaneous backscatter instability, with implications for magnetized laser-confinement experiments.

7 pages, 4 figures

References in corpus (14)

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Cited by in corpus (9)

• Plasma physics in strong-field regimes: theories and simulations
• Growth, saturation and collapse of laser-driven plasma density gratings
• Towards Megajoule X-ray Lasers via Relativistic 4-Photon Cascade in Plasma
• Magnetized Laser-Plasma Interactions in High-Energy-Density Systems: Parallel Propagation
• Modulation-Slippage Tradeoff in Resonant Four-Wave Upconversion
• Enhanced strong-coupling stimulated Brillouin amplification assisted by Raman amplification
• Enhanced collisionless laser absorption in strongly magnetized plasmas
• Phase-Matched Harmonic Generation in Strongly Magnetized Plasma
• Pushing the Frontiers of Light: Magnetized Plasma Lenses and Chirp Tailoring for Extreme Intensities