Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000
Reduced Pease–Braginskii currents are estimated for a linear pinch in a range of gases, namely, D, He, Ne, Ar, Kr, and Xe. A characteristic depletion time is defined as the time it takes for the plasma focus (PF) pinch energy to be radiated away. This quantity is used as an indicator for expecta...
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| Format: | Article |
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IEEE
2016
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| Online Access: | http://eprints.intimal.edu.my/321/ |
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| author | Lee, Sing Saw, Sor Heoh Akel, M. Ali, Jalil Kunze, Hans Joachim Kubes, Pavel Paduch, Marion |
| author_facet | Lee, Sing Saw, Sor Heoh Akel, M. Ali, Jalil Kunze, Hans Joachim Kubes, Pavel Paduch, Marion |
| author_sort | Lee, Sing |
| building | INTI Institutional Repository |
| collection | Online Access |
| description | Reduced Pease–Braginskii currents are estimated
for a linear pinch in a range of gases, namely, D, He, Ne, Ar, Kr,
and Xe. A characteristic depletion time is defined as the time it
takes for the plasma focus (PF) pinch energy to be radiated away.
This quantity is used as an indicator for expectation of radiative
collapse. The depletion times in various gases are estimated in
units of pinch duration. The values indicate that in D and He,
the radiation powers are small, resulting in such long depletion
times that no radiative collapse may be expected in the lifetime
of the focus pinch. In Ne, low tens of percent are radiated
and significant cooling and reduction in radius ratio may be
anticipated. In Ar, Kr, and Xe, the depletion time is only a
fraction of the estimated pinch duration, so radiative collapse
may be expected. Numerical experiments are then carried out
with a circuit-coupled code, which incorporates radiation-coupled
dynamics with PF pinch elongation and plasma self-absorption.
The latter eventually limits the radiated power and stops the
radiative collapse. These results show the detailed dynamics and
confirm the expectations arising from depletion times discussed
above. |
| first_indexed | 2025-11-14T11:51:19Z |
| format | Article |
| id | intimal-321 |
| institution | INTI International University |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:51:19Z |
| publishDate | 2016 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | intimal-3212016-11-07T01:33:05Z http://eprints.intimal.edu.my/321/ Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000 Lee, Sing Saw, Sor Heoh Akel, M. Ali, Jalil Kunze, Hans Joachim Kubes, Pavel Paduch, Marion QC Physics Reduced Pease–Braginskii currents are estimated for a linear pinch in a range of gases, namely, D, He, Ne, Ar, Kr, and Xe. A characteristic depletion time is defined as the time it takes for the plasma focus (PF) pinch energy to be radiated away. This quantity is used as an indicator for expectation of radiative collapse. The depletion times in various gases are estimated in units of pinch duration. The values indicate that in D and He, the radiation powers are small, resulting in such long depletion times that no radiative collapse may be expected in the lifetime of the focus pinch. In Ne, low tens of percent are radiated and significant cooling and reduction in radius ratio may be anticipated. In Ar, Kr, and Xe, the depletion time is only a fraction of the estimated pinch duration, so radiative collapse may be expected. Numerical experiments are then carried out with a circuit-coupled code, which incorporates radiation-coupled dynamics with PF pinch elongation and plasma self-absorption. The latter eventually limits the radiated power and stops the radiative collapse. These results show the detailed dynamics and confirm the expectations arising from depletion times discussed above. IEEE 2016 Article PeerReviewed Lee, Sing and Saw, Sor Heoh and Akel, M. and Ali, Jalil and Kunze, Hans Joachim and Kubes, Pavel and Paduch, Marion (2016) Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000. IEEE Transactions on Plasma Science, 44 (2). pp. 165-173. ISSN 0093-3813 http://ieeexplore.ieee.org/document/7336543/ 10.1109/TPS.2015.2497269 |
| spellingShingle | QC Physics Lee, Sing Saw, Sor Heoh Akel, M. Ali, Jalil Kunze, Hans Joachim Kubes, Pavel Paduch, Marion Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000 |
| title | Conditions for Radiative Cooling and Collapse in
the Plasma Focus Illustrated With Numerical
Experiments on PF1000 |
| title_full | Conditions for Radiative Cooling and Collapse in
the Plasma Focus Illustrated With Numerical
Experiments on PF1000 |
| title_fullStr | Conditions for Radiative Cooling and Collapse in
the Plasma Focus Illustrated With Numerical
Experiments on PF1000 |
| title_full_unstemmed | Conditions for Radiative Cooling and Collapse in
the Plasma Focus Illustrated With Numerical
Experiments on PF1000 |
| title_short | Conditions for Radiative Cooling and Collapse in
the Plasma Focus Illustrated With Numerical
Experiments on PF1000 |
| title_sort | conditions for radiative cooling and collapse in
the plasma focus illustrated with numerical
experiments on pf1000 |
| topic | QC Physics |
| url | http://eprints.intimal.edu.my/321/ http://eprints.intimal.edu.my/321/ http://eprints.intimal.edu.my/321/ |