Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus

In a plasma focus operation, the X-ray radiation properties are dependent on the thermodynamics data such as ion fraction (α), effective ion charge number (Zeff), and effective specific heat ratio (γ) at different temperatures. In Corona Model (CM), the value of ion fraction was first obtained from...

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Main Author:	Abdul Rashid, Natashah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	QD Chemistry
Online Access:	http://eprints.utm.my/id/eprint/77768/1/NatashahAbdulRashidPFS2014.pdf
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spelling	my-utm-ep.777682018-07-04T11:44:18Z Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus 2014-11 Abdul Rashid, Natashah QD Chemistry In a plasma focus operation, the X-ray radiation properties are dependent on the thermodynamics data such as ion fraction (α), effective ion charge number (Zeff), and effective specific heat ratio (γ) at different temperatures. In Corona Model (CM), the value of ion fraction was first obtained from McWhirter’s equation and was subsequently used in determining the Zeff and γ values. The state-of-the-art ion fraction calculation based on Mazzotta’s (Mazz) in Modified Corona Model (MOCM) was compared with McWhirter’s (McW) computations for neon, argon and nitrogen gases. The implementation of McW’s and Mazz’s ion fraction calculation in CM and MOCM cases respectively showed deviations in terms of temperatures. The aim of this study is to investigate the Zeff and γ values based on the ion fraction values determined from Mazz’s and McW’s computations and applied in numerical experiment of plasma focus device emphasizing on radial compression plasma dynamics and parameters of soft X-ray (SXR) emission. The Zeff and γ for both computations were incorporated in Lee code for numerical experiment on SXR yield. Lee code version RADPF5.15K has been used with the incorporation of Zeff and γ computation based on CM and MOCM operating in various gas pressures. The parameters of SXR yield played important role as they were affected by these different thermodynamics data calculation used in CM and MOCM in the Lee Model. Among these three operating gases, argon plasma of MOCM showed tremendous significant effect towards the results in SXR yield which cannot be disregarded. Thus, it is concluded that the ion fraction values derived from Mazz’s computation has a significant effects on Zeff, γ, higher SXR yield and enhances radial compression phase performance. 2014-11 Thesis http://eprints.utm.my/id/eprint/77768/ http://eprints.utm.my/id/eprint/77768/1/NatashahAbdulRashidPFS2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:98534 phd doctoral Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Abdul Rashid, Natashah Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
description	In a plasma focus operation, the X-ray radiation properties are dependent on the thermodynamics data such as ion fraction (α), effective ion charge number (Zeff), and effective specific heat ratio (γ) at different temperatures. In Corona Model (CM), the value of ion fraction was first obtained from McWhirter’s equation and was subsequently used in determining the Zeff and γ values. The state-of-the-art ion fraction calculation based on Mazzotta’s (Mazz) in Modified Corona Model (MOCM) was compared with McWhirter’s (McW) computations for neon, argon and nitrogen gases. The implementation of McW’s and Mazz’s ion fraction calculation in CM and MOCM cases respectively showed deviations in terms of temperatures. The aim of this study is to investigate the Zeff and γ values based on the ion fraction values determined from Mazz’s and McW’s computations and applied in numerical experiment of plasma focus device emphasizing on radial compression plasma dynamics and parameters of soft X-ray (SXR) emission. The Zeff and γ for both computations were incorporated in Lee code for numerical experiment on SXR yield. Lee code version RADPF5.15K has been used with the incorporation of Zeff and γ computation based on CM and MOCM operating in various gas pressures. The parameters of SXR yield played important role as they were affected by these different thermodynamics data calculation used in CM and MOCM in the Lee Model. Among these three operating gases, argon plasma of MOCM showed tremendous significant effect towards the results in SXR yield which cannot be disregarded. Thus, it is concluded that the ion fraction values derived from Mazz’s computation has a significant effects on Zeff, γ, higher SXR yield and enhances radial compression phase performance.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abdul Rashid, Natashah
author_facet	Abdul Rashid, Natashah
author_sort	Abdul Rashid, Natashah
title	Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
title_short	Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
title_full	Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
title_fullStr	Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
title_full_unstemmed	Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
title_sort	thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2014
url	http://eprints.utm.my/id/eprint/77768/1/NatashahAbdulRashidPFS2014.pdf
_version_	1747817826216837120

Thermodynamics effects on the compression dynamics of soft x-ray emission in plasma focus

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