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

Journal Article · Mon Jun 20 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4954383· OSTI ID:22590833

Sawada, H. ^[1]; Lee, S.; Nagatomo, H.; Arikawa, Y.; Nishimura, H.; Ueda, T.; Shigemori, K.; Fujioka, S. ^[2]; Shiroto, T.; Ohnishi, N. ^[3]; Sunahara, A. ^[4]; Beg, F. N. ^[5]; Theobald, W. ^[6]; Pérez, F. ^[7]; Patel, P. K. ^[8]

---

1. Department of Physics, University of Nevada Reno, Reno, Nevada 89557 (United States)
2. Institute of Laser Engineering, Osaka University, Suita, Osaka (Japan)
3. Department of Aerospace Engineering, Tohoku University, Sendai, Miyagi (Japan)
4. Institute of Laser Technology, Nishi-ku, Osaka (Japan)
5. University of California San Diego, La Jolla, California 92093 (United States)
6. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
7. LULI, Ecole Polytechnique, Palaiseau, Cedex (France)
8. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

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/cm{sup 2}. The temporal evolution of the experimental and simulated areal densities with a 2-D radiation-hydrodynamics code is in good agreement.

• OSTI ID: 22590833
• Journal Information: Applied Physics Letters, Vol. 108, Issue 25; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPRESSION
DENSITY
LASERS
MAGNESIUM 26
SPHERICAL CONFIGURATION
THERMONUCLEAR IGNITION
TWO-DIMENSIONAL SYSTEMS
X RADIATION
X-RAY RADIOGRAPHY