Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases
The indicative values of reduced Pease–Braginskii (P–B) currents are estimated for a nitrogen and oxygen plasma focus. The values of depletion times indicate that in N2 and O2 with estimated 3–4% of pinch energy radiating away over the duration of the pinch, we may expect some cooling effects leadin...
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World Scientific Publishing Co Pte Ltd
2017
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| Online Access: | http://eprints.intimal.edu.my/823/ |
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| author | Akel, M. Ismael, Sh. Lee, S. Saw, S. H. Kunze, H. J. |
| author_facet | Akel, M. Ismael, Sh. Lee, S. Saw, S. H. Kunze, H. J. |
| author_sort | Akel, M. |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | The indicative values of reduced Pease–Braginskii (P–B) currents are estimated for a nitrogen and oxygen plasma focus. The values of depletion times indicate that in N2 and O2 with estimated 3–4% of pinch energy radiating away over the duration of the pinch, we may expect some cooling effects leading to small reductions in radius ratio. In other gases with higher atomic number, the pinch duration is much more than the depletion time, so radiative contraction may be anticipated. The Lee model was employed to study the soft X-ray from PF1000 operated with nitrogen and oxygen. We found nitrogen soft X-ray yield in the water window region of 3.13 kJ, with the corresponding efficiency of 0.9% of the stored energy (E0)(E0), while for the oxygen it was found to be YsxrYsxr = 4.9 kJ, with the efficiency of 1.4% E0E0. The very modest enhancement of compression (radius ratios around 0.1) in the pinches of these two gases gives rise to rather modest pinch energy densities (PEDs) under 109 Jm−3−3. This is in contrast to Kr or Xe where it had been shown that the radiative collapse leads to radius ratios of 0.007 and 0.003, respectively, with PEDs going to large values considerably exceeding 101212 Jm−3−3. |
| first_indexed | 2025-11-14T11:53:20Z |
| format | Article |
| id | intimal-823 |
| institution | INTI International University |
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| last_indexed | 2025-11-14T11:53:20Z |
| publishDate | 2017 |
| publisher | World Scientific Publishing Co Pte Ltd |
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| spelling | intimal-8232017-06-16T01:57:01Z http://eprints.intimal.edu.my/823/ Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases Akel, M. Ismael, Sh. Lee, S. Saw, S. H. Kunze, H. J. QC Physics The indicative values of reduced Pease–Braginskii (P–B) currents are estimated for a nitrogen and oxygen plasma focus. The values of depletion times indicate that in N2 and O2 with estimated 3–4% of pinch energy radiating away over the duration of the pinch, we may expect some cooling effects leading to small reductions in radius ratio. In other gases with higher atomic number, the pinch duration is much more than the depletion time, so radiative contraction may be anticipated. The Lee model was employed to study the soft X-ray from PF1000 operated with nitrogen and oxygen. We found nitrogen soft X-ray yield in the water window region of 3.13 kJ, with the corresponding efficiency of 0.9% of the stored energy (E0)(E0), while for the oxygen it was found to be YsxrYsxr = 4.9 kJ, with the efficiency of 1.4% E0E0. The very modest enhancement of compression (radius ratios around 0.1) in the pinches of these two gases gives rise to rather modest pinch energy densities (PEDs) under 109 Jm−3−3. This is in contrast to Kr or Xe where it had been shown that the radiative collapse leads to radius ratios of 0.007 and 0.003, respectively, with PEDs going to large values considerably exceeding 101212 Jm−3−3. World Scientific Publishing Co Pte Ltd 2017 Article PeerReviewed Akel, M. and Ismael, Sh. and Lee, S. and Saw, S. H. and Kunze, H. J. (2017) Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases. Modern Physics Letters B, 31 (6). ISSN 1793-6640 https://doi.org/10.1142/S0217984917501676 https://doi.org/10.1142/S0217984917501676 |
| spellingShingle | QC Physics Akel, M. Ismael, Sh. Lee, S. Saw, S. H. Kunze, H. J. Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title | Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title_full | Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title_fullStr | Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title_full_unstemmed | Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title_short | Numerical experiments on the PF1000 plasma focus device operated with nitrogen and oxygen gases |
| title_sort | numerical experiments on the pf1000 plasma focus device operated with nitrogen and oxygen gases |
| topic | QC Physics |
| url | http://eprints.intimal.edu.my/823/ http://eprints.intimal.edu.my/823/ http://eprints.intimal.edu.my/823/ |