Effects of Approximation and Close-Fitting Technique of Corona Model on Neon Soft X-Ray Emission in 3-kJ Plasma Focus
In plasma focus (PF), the thermodynamic parameters such as ion fraction α, effective ionic charge number Zeff , and effective specific heat ratio γ at different temperatures may be calculated by corona model (CM). In the Lee model code, the neon Zeff and γ are stored in subroutines using conven...
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IEEE
2015
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| Online Access: | http://eprints.intimal.edu.my/244/ http://eprints.intimal.edu.my/244/ http://eprints.intimal.edu.my/244/1/Effects%20of%20Approximation%20and%20Close-Fitting%20Technique%20of%20Corona%20Model%20on%20Neon%20Soft%20X-Ray%20Emission%20in%203-kJ%20Plasma%20Focus.pdf |
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intimal-2442016-09-05T08:09:02Z http://eprints.intimal.edu.my/244/ Effects of Approximation and Close-Fitting Technique of Corona Model on Neon Soft X-Ray Emission in 3-kJ Plasma Focus Abd Rashid, Natashah Mohamad, Saiful Najmee Chaudhary, Kashif Tufail Lee, Sing Saw, Sor Heoh Ali, Jalil QC Physics In plasma focus (PF), the thermodynamic parameters such as ion fraction α, effective ionic charge number Zeff , and effective specific heat ratio γ at different temperatures may be calculated by corona model (CM). In the Lee model code, the neon Zeff and γ are stored in subroutines using convenient tables and polynomials derived from the CM (we call this approach approximated CM). In this paper, the thermodynamic parameters of the CM are close fitted to the data, thus replacing the approximate CM data with a more accurate close-fitting CM (CFCM). The comparisons of the Lee model code using the approximated CM and CFCM subroutines are conducted, with the main emphasis on optimum neon soft X-ray (SXR) emission and their properties. The suitable focus pinch temperature window of 200–500 eV is applied to generate the optimum neon SXR yield (Ysxr). The optimum neon Ysxr is found to be 3.19 and 3.49 J at the optimum pressure P0 = 3.1 torr with approximated CM and CFCM subroutines, respectively. A high optimum value of SXR yield is obtained using CFCM subroutines in the Lee model, which is nearer to the experimental value compared with the approximated CM subroutines. The use of CFCM in the Lee model contributes to better estimation for further numerical experiment studies and gives confidence that the model is sufficiently realistic in describing the PF dynamics and SXR emission. IEEE 2015 Article PeerReviewed text en http://eprints.intimal.edu.my/244/1/Effects%20of%20Approximation%20and%20Close-Fitting%20Technique%20of%20Corona%20Model%20on%20Neon%20Soft%20X-Ray%20Emission%20in%203-kJ%20Plasma%20Focus.pdf Abd Rashid, Natashah and Mohamad, Saiful Najmee and Chaudhary, Kashif Tufail and Lee, Sing and Saw, Sor Heoh and Ali, Jalil (2015) Effects of Approximation and Close-Fitting Technique of Corona Model on Neon Soft X-Ray Emission in 3-kJ Plasma Focus. IEEE Transactions on Plasma Science, 43 (7). pp. 2146-2154. ISSN 0093-3813 10.1109/TPS.2015.2433301 |
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Online Access |
| language |
English |
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QC Physics |
| spellingShingle |
QC Physics Abd Rashid, Natashah Mohamad, Saiful Najmee Chaudhary, Kashif Tufail Lee, Sing Saw, Sor Heoh Ali, Jalil Effects of Approximation and Close-Fitting Technique of Corona Model on Neon Soft X-Ray Emission in 3-kJ Plasma Focus |
| description |
In plasma focus (PF), the thermodynamic
parameters such as ion fraction α, effective ionic charge
number Zeff , and effective specific heat ratio γ at different
temperatures may be calculated by corona model (CM). In the
Lee model code, the neon Zeff and γ are stored in subroutines
using convenient tables and polynomials derived from the CM
(we call this approach approximated CM). In this paper, the
thermodynamic parameters of the CM are close fitted to the data,
thus replacing the approximate CM data with a more accurate
close-fitting CM (CFCM). The comparisons of the Lee model
code using the approximated CM and CFCM subroutines
are conducted, with the main emphasis on optimum neon
soft X-ray (SXR) emission and their properties. The suitable
focus pinch temperature window of 200–500 eV is applied to
generate the optimum neon SXR yield (Ysxr). The optimum neon
Ysxr is found to be 3.19 and 3.49 J at the optimum pressure
P0 = 3.1 torr with approximated CM and CFCM subroutines,
respectively. A high optimum value of SXR yield is obtained
using CFCM subroutines in the Lee model, which is nearer
to the experimental value compared with the approximated
CM subroutines. The use of CFCM in the Lee model contributes
to better estimation for further numerical experiment studies
and gives confidence that the model is sufficiently realistic in
describing the PF dynamics and SXR emission. |
| format |
Article |
| author |
Abd Rashid, Natashah Mohamad, Saiful Najmee Chaudhary, Kashif Tufail Lee, Sing Saw, Sor Heoh Ali, Jalil |
| author_facet |
Abd Rashid, Natashah Mohamad, Saiful Najmee Chaudhary, Kashif Tufail Lee, Sing Saw, Sor Heoh Ali, Jalil |
| author_sort |
Abd Rashid, Natashah |
| title |
Effects of Approximation and Close-Fitting
Technique of Corona Model on Neon Soft
X-Ray Emission in 3-kJ Plasma Focus |
| title_short |
Effects of Approximation and Close-Fitting
Technique of Corona Model on Neon Soft
X-Ray Emission in 3-kJ Plasma Focus |
| title_full |
Effects of Approximation and Close-Fitting
Technique of Corona Model on Neon Soft
X-Ray Emission in 3-kJ Plasma Focus |
| title_fullStr |
Effects of Approximation and Close-Fitting
Technique of Corona Model on Neon Soft
X-Ray Emission in 3-kJ Plasma Focus |
| title_full_unstemmed |
Effects of Approximation and Close-Fitting
Technique of Corona Model on Neon Soft
X-Ray Emission in 3-kJ Plasma Focus |
| title_sort |
effects of approximation and close-fitting
technique of corona model on neon soft
x-ray emission in 3-kj plasma focus |
| publisher |
IEEE |
| publishDate |
2015 |
| url |
http://eprints.intimal.edu.my/244/ http://eprints.intimal.edu.my/244/ http://eprints.intimal.edu.my/244/1/Effects%20of%20Approximation%20and%20Close-Fitting%20Technique%20of%20Corona%20Model%20on%20Neon%20Soft%20X-Ray%20Emission%20in%203-kJ%20Plasma%20Focus.pdf |
| first_indexed |
2018-09-05T09:07:23Z |
| last_indexed |
2018-09-05T09:07:23Z |
| _version_ |
1610757904911040512 |