Designs for highly nonlinear ablative Rayleigh-Taylor experiments on the National Ignition Facility
- CEA, DAM, DIF, F-91297 Arpajon (France)
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
- Laboratory of Laser Energetics, University of Rochester, Rochester, New York 14623-1299 (United States)
- CEA, DAM, VALDUC, F-21120 Is-sur-Tille (France)
We present two designs relevant to ablative Rayleigh-Taylor instability in transition from weakly nonlinear to highly nonlinear regimes at the National Ignition Facility [E. I. Moses, J. Phys.: Conf. Ser. 112, 012003 (2008)]. The sensitivity of nonlinear Rayleigh-Taylor instability physics to ablation velocity is addressed with targets driven by indirect drive, with stronger ablative stabilization, and by direct drive, with weaker ablative stabilization. The indirect drive design demonstrates the potential to reach a two-dimensional bubble-merger regime with a 20 ns duration drive at moderate radiation temperature. The direct drive design achieves a 3 to 5 times increased acceleration distance for the sample in comparison to previous experiments allowing at least 2 more bubble generations when starting from a three-dimensional broadband spectrum.
- OSTI ID:
- 22086054
- Journal Information:
- Physics of Plasmas, Vol. 19, Issue 8; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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