Elucidating the collimation of laboratory plasma jets using soft x-ray interferometry

M. A. Purvis; J. Grava; J. Filevich; D. P. Ryan; S. J. Moon; J. Dunn; V. N. Shlyaptsev; J. J. Rocca

doi:10.1117/12.826283

28 September 2009 Elucidating the collimation of laboratory plasma jets using soft x-ray interferometry

M. A. Purvis, J. Grava, J. Filevich, D. P. Ryan, S. J. Moon, J. Dunn, V. N. Shlyaptsev, J. J. Rocca

Proceedings Volume 7451, Soft X-Ray Lasers and Applications VIII; 74510L (2009) https://doi.org/10.1117/12.826283
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.826283

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