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4 March 2016 Nonlinear laser-plasma interaction in magnetized liner inertial fusion
Matthias Geissel, T. J. Awe, D. E. Bliss, M. E. Campbell, M. R. Gomez, E. Harding, A. J. Harvey-Thompson, S. B. Hansen, C. Jennings, M. W. Kimmel, P. Knapp, S. M. Lewis, R. D. McBride, K. Peterson, M. Schollmeier, D. J. Scoglietti, A. B. Sefkow, J. E. Shores, D. B. Sinars, S. A. Slutz, I. C. Smith, C. S. Speas, R. A. Vesey, J. L. Porter
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Proceedings Volume 9731, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV; 97310O (2016) https://doi.org/10.1117/12.2218577
Event: SPIE LASE, 2016, San Francisco, California, United States
Abstract
Sandia National Laboratories is pursuing a variation of Magneto-Inertial Fusion called Magnetized Liner Inertial Fusion, or MagLIF. The MagLIF approach requires magnetization of the deuterium fuel, which is accomplished by an initial external B-Field and laser-driven pre-heat. While magnetization is crucial to the concept, it is challenging to couple sufficient energy to the fuel, since laser-plasma instabilities exist, and a compromise between laser spot size, laser entrance window thickness, and fuel density must be found. Nonlinear processes in laser plasma interaction, or laser-plasma instabilities (LPI), complicate the deposition of laser energy by enhanced absorption, backscatter, filamentation and beam-spray. Key LPI processes are determined, and mitigation methods are discussed. Results with and without improvement measures are presented.
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Matthias Geissel, T. J. Awe, D. E. Bliss, M. E. Campbell, M. R. Gomez, E. Harding, A. J. Harvey-Thompson, S. B. Hansen, C. Jennings, M. W. Kimmel, P. Knapp, S. M. Lewis, R. D. McBride, K. Peterson, M. Schollmeier, D. J. Scoglietti, A. B. Sefkow, J. E. Shores, D. B. Sinars, S. A. Slutz, I. C. Smith, C. S. Speas, R. A. Vesey, and J. L. Porter "Nonlinear laser-plasma interaction in magnetized liner inertial fusion", Proc. SPIE 9731, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV, 97310O (4 March 2016); https://doi.org/10.1117/12.2218577
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KEYWORDS
Electrons
Plasma
Backscatter
Laser energy
Absorption
Light scattering
Modulation
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