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.
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20 June 2016
Research Article|
June 20 2016
Flash Kα radiography of laser-driven solid sphere compression for fast ignition
H. Sawada
;
H. Sawada
1Department of Physics,
University of Nevada Reno
, Reno, Nevada 89557, USA
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S. Lee;
S. Lee
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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T. Shiroto;
T. Shiroto
3Department of Aerospace Engineering,
Tohoku University
, Sendai, Miyagi, Japan
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H. Nagatomo;
H. Nagatomo
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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Y. Arikawa;
Y. Arikawa
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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H. Nishimura;
H. Nishimura
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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T. Ueda;
T. Ueda
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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K. Shigemori
;
K. Shigemori
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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A. Sunahara
;
A. Sunahara
4
Institute of Laser Technology
, Nishi-ku, Osaka, Japan
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N. Ohnishi;
N. Ohnishi
3Department of Aerospace Engineering,
Tohoku University
, Sendai, Miyagi, Japan
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F. N. Beg;
F. N. Beg
5
University of California San Diego
, La Jolla, California 92093, USA
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W. Theobald;
W. Theobald
6Laboratory for Laser Energetics,
University of Rochester
, Rochester, New York 14623, USA
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F. Pérez;
F. Pérez
7
LULI
, Ecole Polytechnique, Palaiseau, Cedex, France
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P. K. Patel;
P. K. Patel
8
Lawrence Livermore National Laboratory
, Livermore, California 94550, USA
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S. Fujioka
S. Fujioka
2Institute of Laser Engineering,
Osaka University
, Suita, Osaka, Japan
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Appl. Phys. Lett. 108, 254101 (2016)
Article history
Received:
March 30 2016
Accepted:
June 08 2016
Citation
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; Flash Kα radiography of laser-driven solid sphere compression for fast ignition. Appl. Phys. Lett. 20 June 2016; 108 (25): 254101. https://doi.org/10.1063/1.4954383
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