DocumentCode :
2881941
Title :
Atomic model and synthetic diagnostics for large scale parallel simulations of wire array Z-pinches
Author :
Niasse, Nicolas ; Chittenden, Jeremy
Author_Institution :
Blackett Lab., Imperial Coll., London, UK
fYear :
2011
fDate :
26-30 June 2011
Firstpage :
1
Lastpage :
1
Abstract :
Summary form only given. The recent improvements made to the parallel computing architecture of the resistive Eulerian MHD code GORGON have enabled high resolution 3D simulations of imploding wire array Z-pinches, to be achieved. Simultaneous calculation of the frequency and time dependent radiative properties of intense X-ray sources within such calculations remains a computationally challenging task. Indeed, Z-pinch plasma conditions are spread across a wide range of parameter space and can locally undergo transitions from optically thin to optically thick regimes, this latter point requiring a close coupling of the radiation and magneto-hydrodynamic solvers. We have developed a simple pseudo NLTE code based on a Screened Hydrogenic Model (SHM) that is rapid enough to be run in-line with GORGON whilst still producing fairly detailed spectral output. An offline version of this code provides a post processing tool with further spectral detail for the generation of synthetic spectra. This model belongs to a suite of numerical diagnostics providing simulated laser shadowgraphy, X-ray radiography, XUV imaging and proton probing capabilities. We present a series of detailed comparisons of high resolution simulations post-processed with these tools, with experimental data from High Energy Density Physics experiments at Imperial College, Sandia National Laboratory and University of Nevada at Reno.
Keywords :
Z pinch; numerical analysis; plasma X-ray sources; plasma density; plasma diagnostics; plasma magnetohydrodynamics; plasma simulation; X-ray radiography; X-ray sources; XUV imaging; atomic model; high-resolution 3D simulation; implosion; magnetohydrodynamics; parallel simulation; plasma diagnostics; proton probing capability; resistive Eulerian MHD code GORGON; screened hydrogenic model; simulated laser shadowgraphy; wire array Z-pinches; Atom optics; Optical imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science (ICOPS), 2011 Abstracts IEEE International Conference on
Conference_Location :
Chicago, IL
ISSN :
0730-9244
Print_ISBN :
978-1-61284-330-8
Electronic_ISBN :
0730-9244
Type :
conf
DOI :
10.1109/PLASMA.2011.5993085
Filename :
5993085
Link To Document :
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