Flash Kα radiography of laser-driven solid sphere compression for fast ignition

H. Sawada, S. Lee, T. Shiroto, H. Nagatomo, Y. Arikawa, H. Nishimura, T. Ueda, K. Shigemori, A. Sunahara, N. Ohnishi, F. N. Beg, W. Theobald, F. Pérez, P. K. Patel, S. Fujioka

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Abstract

Time-resolved compression of a laser-driven solid deuterated plastic sphere with a cone was measured with flash Kα x-ray radiography. A spherically converging shockwave launched by nanosecond GEKKO XII beams was used for compression while a flash of 4.51 keV Ti Kα x-ray backlighter was produced by a high-intensity, picosecond laser LFEX (Laser for Fast ignition EXperiment) near peak compression for radiography. Areal densities of the compressed core were inferred from two-dimensional backlit x-ray images recorded with a narrow-band spherical crystal imager. The maximum areal density in the experiment was estimated to be 87 ± 26 mg/cm2. The temporal evolution of the experimental and simulated areal densities with a 2-D radiation-hydrodynamics code is in good agreement.

Original languageEnglish
Article number254101
JournalApplied Physics Letters
Volume108
Issue number25
DOIs
Publication statusPublished - 2016 Jun 20

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Sawada, H., Lee, S., Shiroto, T., Nagatomo, H., Arikawa, Y., Nishimura, H., Ueda, T., Shigemori, K., Sunahara, A., Ohnishi, N., Beg, F. N., Theobald, W., Pérez, F., Patel, P. K., & Fujioka, S. (2016). Flash Kα radiography of laser-driven solid sphere compression for fast ignition. Applied Physics Letters, 108(25), [254101]. https://doi.org/10.1063/1.4954383