Estimating Ratio of Peak to Uniform Values of Various profiles of relevance of Plasma Focus Pinch

Hdl Handle:
http://hdl.handle.net/10149/565840
Title:
Estimating Ratio of Peak to Uniform Values of Various profiles of relevance of Plasma Focus Pinch
Authors:
Chong, P. L. (Perk Lin); Lee, S.; Saw, S. H. (Sor Heoh)
Affiliation:
Teesside University. School of Science and Engineering
Citation:
Chong, P. L., Lee, S., Saw, S. H. (2013) 'Estimating Ratio of Peak to Uniform Values of Various profiles of relevance of Plasma Focus Pinch' Journal of Engineering Science and Technology; 8 (1): 27-33
Publisher:
Taylors Univeristy
Journal:
Journal of Engineering Science and Technology
Issue Date:
2013
URI:
http://hdl.handle.net/10149/565840
Additional Links:
http://www.jourlib.org/paper/2034584#.Vcnxc_nijhU
Abstract:
In the Lee Model code for radiative plasma focus computation, both the density profile and the temperature profile (versus anode radius) of the pinch column are approximated by step functions with uniform values across the column radius. This means that the computed density and temperatures will be lower than the physical situation where the density and temperature profiles will certainly have peak values higher than the uniform (with radius) values of the step function. It has been shown that the density profile is side-peaked (somewhat shell-shaped or like the shape of a volcanic crater) with the assumption of no reflected shock wave; whereas the temperature profile is centre-peaked somewhat like a Gaussian shape. The aim of this paper is to investigate the use of higher degree mathematical function, where the cratershaped profile can be well represented, to approximate the plasma focus density profile. Two different approximated functions will be discussed: namely Gaussian distribution function and Bézier function. From these profiles we obtain the likely ratio of the profiled peak temperature to the step function uniform temperature and the peak density to the step function uniform density. In this manner we are able to suggest correction factors to the temperature and density computed by the Lee Model code.
Type:
Article
Language:
en
ISSN:
1823-4690
Rights:
No publisher policy information available from http://www.sherpa.ac.uk/romeo [Accessed: 11/08/2015]

Full metadata record

DC FieldValue Language
dc.contributor.authorChong, P. L. (Perk Lin)en
dc.contributor.authorLee, S.en
dc.contributor.authorSaw, S. H. (Sor Heoh)en
dc.date.accessioned2015-08-11T13:04:01Zen
dc.date.available2015-08-11T13:04:01Zen
dc.date.issued2013en
dc.identifier.citationJournal of Engineering Science and Technology; 8 (1): 27-33en
dc.identifier.issn1823-4690en
dc.identifier.urihttp://hdl.handle.net/10149/565840en
dc.description.abstractIn the Lee Model code for radiative plasma focus computation, both the density profile and the temperature profile (versus anode radius) of the pinch column are approximated by step functions with uniform values across the column radius. This means that the computed density and temperatures will be lower than the physical situation where the density and temperature profiles will certainly have peak values higher than the uniform (with radius) values of the step function. It has been shown that the density profile is side-peaked (somewhat shell-shaped or like the shape of a volcanic crater) with the assumption of no reflected shock wave; whereas the temperature profile is centre-peaked somewhat like a Gaussian shape. The aim of this paper is to investigate the use of higher degree mathematical function, where the cratershaped profile can be well represented, to approximate the plasma focus density profile. Two different approximated functions will be discussed: namely Gaussian distribution function and Bézier function. From these profiles we obtain the likely ratio of the profiled peak temperature to the step function uniform temperature and the peak density to the step function uniform density. In this manner we are able to suggest correction factors to the temperature and density computed by the Lee Model code.en
dc.language.isoenen
dc.publisherTaylors Univeristyen
dc.relation.urlhttp://www.jourlib.org/paper/2034584#.Vcnxc_nijhUen
dc.rightsNo publisher policy information available from http://www.sherpa.ac.uk/romeo [Accessed: 11/08/2015]en
dc.titleEstimating Ratio of Peak to Uniform Values of Various profiles of relevance of Plasma Focus Pinchen
dc.typeArticleen
dc.contributor.departmentTeesside University. School of Science and Engineeringen
dc.identifier.journalJournal of Engineering Science and Technologyen
or.citation.harvardChong, P. L., Lee, S., Saw, S. H. (2013) 'Estimating Ratio of Peak to Uniform Values of Various profiles of relevance of Plasma Focus Pinch' Journal of Engineering Science and Technology; 8 (1): 27-33en
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