
Proceedings Paper
Implosion and heating diagnostics of fast ignition laser fusion target with ultra-high-speed x-ray imagingFormat | Member Price | Non-Member Price |
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Paper Abstract
Implosion and heating experiments of Fast Ignition (FI) targets for FIREX-1 laser fusion project have been performed
with Gekko-XII and PW/LFEX lasers at the Institute of Laser Engineering, Osaka University. Typical FI target has a
hollow cone for guiding the short-pulse heating laser beam at the time of the maximum compression. The cone is
mounted so as to in one-side penetrate the shell target. Detailed implosion hydrodynamics, FI heating and core plasma
formation of plastic (CD) shell target with gold cone have been clarified by observing those with ultra high-speed
imaging x-ray spectroscopy as well as neutron diagnostics. Multi-channel Multi-Imaging X-Ray Streak Camera
(McMIXS) was improved for observation of time-resolved x-ray images and time-resolved two dimensional temperature
distributions with spatial and temporal resolutions of 20 microns and 24 ps (42 Gfps), respectively. With this instrument,
one can observe heating properties of the imploded core such as spatial distribution of the heated region and its temporal
evolution. Also 2D-SIXS (Two-Dimensional Sampling Image X-ray Streak camera) coupled with an x-ray imager was
improved for time resolved x-ray imaging of the imploded core. Synchronization of the heating beam injection to the
implosion dynamics has been monitored with an x-ray framing camera. It was found that the shape of the core is neither
spherical nor uniform mainly because of the existence of the cone and moving toward the tip of the cone and interacting
with it. Experimental results are compared with two-dimensional hydrodynamic simulations. Target design taking into
account of these phenomena is quite important because such core movement and jet formation can affect the condition of
the cone.
Paper Details
Date Published: 10 February 2009
PDF: 8 pages
Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71261L (10 February 2009); doi: 10.1117/12.822856
Published in SPIE Proceedings Vol. 7126:
28th International Congress on High-Speed Imaging and Photonics
Harald Kleine; Martha Patricia Butron Guillen, Editor(s)
PDF: 8 pages
Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71261L (10 February 2009); doi: 10.1117/12.822856
Show Author Affiliations
T. Mochiyama, Osaka Univ. (Japan)
H. Azechi, Osaka Univ. (Japan)
H. Azechi, Osaka Univ. (Japan)
Published in SPIE Proceedings Vol. 7126:
28th International Congress on High-Speed Imaging and Photonics
Harald Kleine; Martha Patricia Butron Guillen, Editor(s)
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