Theory and simulation of Raman scattering in intense short-pulse laser-plasma interactions

Scott C. Wilks; William L. Kruer; A. B. Langdon; Peter A. Amendt; David C. Eder; Christopher J. Keane

doi:10.1117/12.46145

1 June 1991 Theory and simulation of Raman scattering in intense short-pulse laser-plasma interactions

Scott C. Wilks, William L. Kruer, A. B. Langdon, Peter A. Amendt, David C. Eder, Christopher J. Keane

Proceedings Volume 1413, Short-Pulse High-Intensity Lasers and Applications; (1991) https://doi.org/10.1117/12.46145
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

We report on the stimulated Raman scattering (SRS) that occurs when short (~ 50-100 femtoseconds), intense (I~2 x 10¹⁷ W/cm²) laser pulses are focused into a plasma, or a neutral gas which quickly becomes a plasma due to multiphoton ionization. Review of the usual SRS growth rates will be given, followed by a discussion on how this theory is modified for short pulses. It is found that for some recombination x-ray laser schemes employing short pulses, the Raman instability can potentially heat the electrons to levels that would greatly reduce the efficiency of such a device. However, there are areas in parameter space where the temperature of heated electrons can be kept to acceptable levels. One dimensional, relativistic, particle-in-cell (PlC) simulations are presented.

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Scott C. Wilks, William L. Kruer, A. B. Langdon, Peter A. Amendt, David C. Eder, and Christopher J. Keane "Theory and simulation of Raman scattering in intense short-pulse laser-plasma interactions", Proc. SPIE 1413, Short-Pulse High-Intensity Lasers and Applications, (1 June 1991); https://doi.org/10.1117/12.46145

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