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Proceedings Paper

Generation of strongly coupled plasma using Argon-based capillary discharge lasers
Author(s): Andrew K. Rossall; Valentin Aslanyan; Sarah Wilson; Gregory J. Tallents
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Paper Abstract

Argon based capillary discharge lasers operate in the extreme ultra violet (EUV) at 46.9 nm with an output of up to 0.5 mJ energy per pulse and up to a 10 Hz repetition rate. Focussed irradiances of up to 1012 W cm-2 are achievable and can be used to generate plasma in the warm dense matter regime by irradiating solid material. To model the interaction between such an EUV laser and solid material, the 2D radiative-hydrodynamic code POLLUX has been modified to include absorption via direct photo-ionisation, a super-configuration model to describe the ionisation dependant electronic configurations and a calculation of plasma refractive indices for ray tracing of the incident EUV laser radiation. A simulation study is presented, demonstrating how capillary discharge lasers of 1.2ns pulse duration can be used to generate strongly coupled plasma at close to solid density with temperatures of a few eV and energy densities up to 1×105 J cm-3. Plasmas produced by EUV laser irradiation are shown to be useful for examining the equation-of-state properties of warm dense matter. One difficulty with this technique is the reduction of the strong temperature and density gradients which are produced during the interaction. Methods to inhibit and control these gradients will be examined.

Paper Details

Date Published: 22 September 2015
PDF: 7 pages
Proc. SPIE 9589, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI, 95890C (22 September 2015); doi: 10.1117/12.2188009
Show Author Affiliations
Andrew K. Rossall, The Univ. of York (United Kingdom)
Valentin Aslanyan, The Univ. of York (United Kingdom)
Sarah Wilson, The Univ. of York (United Kingdom)
Gregory J. Tallents, The Univ. of York (United Kingdom)

Published in SPIE Proceedings Vol. 9589:
X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI
Annie Klisnick; Carmen S. Menoni, Editor(s)

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