Observation of hohlraum-wall motion with spectrally selective x-ray imaging at the National Ignition Facility.

Autor: Izumi N; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Meezan NB; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Divol L; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Hall GN; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Barrios MA; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Jones O; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Landen OL; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Kroll JJ; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Vonhof SA; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Nikroo A; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Jaquez J; General Atomics, San Diego, California 9212, USA., Bailey CG; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Hardy CM; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Ehrlich RB; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Town RP; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Bradley DK; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Hinkel DE; Lawrence Livermore National Laboratory, Livermore, California 94551, USA., Moody JD; Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Jazyk: angličtina
Zdroj: The Review of scientific instruments [Rev Sci Instrum] 2016 Nov; Vol. 87 (11), pp. 11E321.
DOI: 10.1063/1.4960758
Abstrakt: The high fuel capsule compression required for indirect drive inertial confinement fusion requires careful control of the X-ray drive symmetry throughout the laser pulse. When the outer cone beams strike the hohlraum wall, the plasma ablated off the hohlraum wall expands into the hohlraum and can alter both the outer and inner cone beam propagations and hence the X-ray drive symmetry especially at the final stage of the drive pulse. To quantitatively understand the wall motion, we developed a new experimental technique which visualizes the expansion and stagnation of the hohlraum wall plasma. Details of the experiment and the technique of spectrally selective x-ray imaging are discussed.
Databáze: MEDLINE
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