4 March 2016 Nonlinear laser-plasma interaction in magnetized liner inertial fusion
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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, Matthias Geissel, T. J. Awe, T. J. Awe, D. E. Bliss, D. E. Bliss, M. E. Campbell, M. E. Campbell, M. R. Gomez, M. R. Gomez, E. Harding, E. Harding, A. J. Harvey-Thompson, A. J. Harvey-Thompson, S. B. Hansen, S. B. Hansen, C. Jennings, C. Jennings, M. W. Kimmel, M. W. Kimmel, P. Knapp, P. Knapp, S. M. Lewis, S. M. Lewis, R. D. McBride, R. D. McBride, K. Peterson, K. Peterson, M. Schollmeier, M. Schollmeier, D. J. Scoglietti, D. J. Scoglietti, A. B. Sefkow, A. B. Sefkow, J. E. Shores, J. E. Shores, D. B. Sinars, D. B. Sinars, S. A. Slutz, S. A. Slutz, I. C. Smith, I. C. Smith, C. S. Speas, C. S. Speas, R. A. Vesey, R. A. Vesey, J. L. Porter, 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); doi: 10.1117/12.2218577; https://doi.org/10.1117/12.2218577

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