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28 September 2009 Elucidating the collimation of laboratory plasma jets using soft x-ray interferometry
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The mechanisms responsible for an increase in collimation of laboratory plasma jets with higher atomic number was studied using soft x-ray laser interferometry and 2D model simulations. Dense plasma jets (Ne~ 1020 cm-3) were produced by irradiating V-shaped grooves of different materials (C, Al, and Cu) with 120 ps Ti:Sa laser pulses at peak intensities of 1 x 1012 W cm-2. High contrast soft x-ray interferograms of these plasmas were generated by combining a Mach-Zehnder interferometer that uses diffraction gratings as beam-splitters and a 46.9 nm table-top capillary discharge laser probe. A significant increase in jet collimation was observed for the higher Z materials. Simulations performed with the radiation hydrodynamic code HYDRA attribute differences in jet collimation to an increased radiation cooling of the higher Z jets.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. A. Purvis, J. Grava, J. Filevich, D. P. Ryan, S. J. Moon, J. Dunn, V. N. Shlyaptsev, and J. J. Rocca "Elucidating the collimation of laboratory plasma jets using soft x-ray interferometry", Proc. SPIE 7451, Soft X-Ray Lasers and Applications VIII, 74510L (28 September 2009);


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