Laser Amplification in Strongly-Magnetized Plasma
In: Phys. Rev. Lett. 123, 025001 (2019); (2018)
Online
report
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.
Comment: 7 pages, 4 figures
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Laser Amplification in Strongly-Magnetized Plasma
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Autor/in / Beteiligte Person: | Edwards, Matthew R. ; Shi, Yuan ; Mikhailova, Julia M. ; Fisch, Nathaniel J. |
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Quelle: | Phys. Rev. Lett. 123, 025001 (2019); (2018) |
Veröffentlichung: | 2018 |
Medientyp: | report |
DOI: | 10.1103/PhysRevLett.123.025001 |
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