High-speed X-ray radiographic measurement of laser-driven hydrodynamic instability

Hiroyuki Shiraga; Hiroshi Azechi; Mitsuo Nakai; Keisuke Shigemori; Masaharu Nishikino; Tatsuhiro Sakaiya; Shinsuke Fujioka; Yohei Tamari; Tatsuhiko Yamanaka

doi:10.1117/12.516778

1 August 2003 High-speed x-ray radiographic measurement of laser-driven hydrodynamic instability

Hiroyuki Shiraga, Hiroshi Azechi, Mitsuo Nakai, Keisuke Shigemori, Masaharu Nishikino, Tatsuhiro Sakaiya, Shinsuke Fujioka, Yohei Tamari, Tatsuhiko Yamanaka

Author Affiliations +

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516778
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

Abstract

Hydrodynamic instability in laser-irradiated targets have been investigated in detail by using ultra high-speed x-ray radiographic technique. Recently developed high-resolution x-ray imaging for laser-driven Rayleigh-Taylor (RT) instability experiments as well as data including RT growth rate, ablation density and plasma density profile are desribed. Results are of great importance for comprehensive understanding of the dispersion relation of the laser-driven RT instability. Especially, direct observation of the ablation density was first achieved with temporal and spatial resolutions of 100 ps and 3 μm, respectively. Imaging techniques includes x-ray Moire imaging, x-ray penumbral imaging and Fresnel phase zone plate imaging coupled with x-ray streak cameras or x-ray CCD cameras. Experiments were performed by using Gekko-XII/HIPER laser system at the Institute of Laser Engineering, Osaka University.

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Hiroyuki Shiraga, Hiroshi Azechi, Mitsuo Nakai, Keisuke Shigemori, Masaharu Nishikino, Tatsuhiro Sakaiya, Shinsuke Fujioka, Yohei Tamari, and Tatsuhiko Yamanaka "High-speed x-ray radiographic measurement of laser-driven hydrodynamic instability", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516778

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KEYWORDS

X-rays

Laser ablation

X-ray imaging

Laser irradiation

Plasma

Spatial resolution

Moire patterns

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