Measurement by XUV laser radiography of hydrodynamic perturbations in laser-accelerated thin foil targets

Michael H. Key; D. H. Kalantar; Troy W. Barbee Jr.; Luiz Barroca Da Silva; S. Gail Glendinning; James P. Knauer; Bruce A. Remington; Franz A. Weber; Stephen V. Weber

doi:10.1117/12.221643

25 September 1995 Measurement by XUV laser radiography of hydrodynamic perturbations in laser-accelerated thin foil targets

Michael H. Key, D. H. Kalantar, Troy W. Barbee Jr., Luiz Barroca Da Silva, S. Gail Glendinning, James P. Knauer, Bruce A. Remington, Franz A. Weber, Stephen V. Weber

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Proceedings Volume 2520, Soft X-Ray Lasers and Applications; (1995) https://doi.org/10.1117/12.221643
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

A novel diagnostic application of XUV lasers has been developed for the study of the hydrodynamic imprinting of laser speckle pattern on directly driven laser fusion targets. A neon-like yttrium laser operating at 15.5 nm is used to probe thin foils of Si irradiated with an SSD smoothed laser at 0.35 mm wavelength and 6 10¹² Wcm^-2 intensity, simulating the initial phase of irradiation of a laser fusion capsule. Measurements of the perturbations in target opacity are made by XUV radiography through the foil. The magnitude and Fourier composition of the perturbations has been determined both before and after Rayleigh Taylor growth, showing the mode spectra of both the initial imprint and the subsequent RT growth.

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Michael H. Key, D. H. Kalantar, Troy W. Barbee Jr., Luiz Barroca Da Silva, S. Gail Glendinning, James P. Knauer, Bruce A. Remington, Franz A. Weber, and Stephen V. Weber "Measurement by XUV laser radiography of hydrodynamic perturbations in laser-accelerated thin foil targets", Proc. SPIE 2520, Soft X-Ray Lasers and Applications, (25 September 1995); https://doi.org/10.1117/12.221643

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KEYWORDS

Speckle pattern

Radiography

Extreme ultraviolet

Radio optics

Opacity

Mirrors

Speckle

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