Modelling K shell spectra from short pulse heated buried microdot targets

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Title: Modelling K shell spectra from short pulse heated buried microdot targets
Authors: Hoarty, DJ
Sircombe, N
Beiersdorfer, P
Brown, CRD
Hill, MP
Hobbs, LMR
James, SF
Morton, J
Hill, E
Jeffery, M
Harris, JWO
Shepherd, R
Marley, E
Magee, E
Emig, J
Nilsen, J
Chung, HK
Lee, RW
Rose, SJ
Item Type: Journal Article
Abstract: K shell X-ray emission measurements have been used to diagnose plasma conditions in short-pulse heated buried microdot targets on the Orion high power laser. These experiments have been used to validate simulations of short pulse laser-solid interaction that combine hybrid PIC modelling of the laser absorption with radiation-hydrodynamics simulations including an electron transport model. Comparison of these simulations with streaked K shell spectroscopy show the importance of including radial gradients in fitting the spectra. An example is presented of the emission of sulphur from a 50 µm diameter microdot sample buried in a plastic foil. Previously agreement between simulation and experiment was obtained only by treating the absorbed energy, electron temperature and beam divergence as fitting parameters. The good agreement obtained in this work used the measured laser energy and laser pulse length and calculated the laser-solid target interaction from first principles.
Issue Date: 17-Apr-2017
Date of Acceptance: 11-Apr-2017
ISSN: 1574-1818
Publisher: Elsevier
Start Page: 178
End Page: 183
Journal / Book Title: High Energy Density Physics
Volume: 23
Copyright Statement: © 2017 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Keywords: Science & Technology
Physical Sciences
Physics, Fluids & Plasmas
Plasma heating with laser beams
Dense plasma spectroscopy
02 Physical Sciences
Fluids & Plasmas
Publication Status: Published
Appears in Collections:Physics
Plasma Physics
Faculty of Natural Sciences

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