Staff View: Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000

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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Main Authors:	Lee, Sing, Saw, Sor Heoh, Akel, M., Ali, Jalil, Kunze, Hans Joachim, Kubes, Pavel, Paduch, Marion
Format:	Article
Published:	IEEE 2016
Subjects:	QC Physics
Online Access:	http://eprints.intimal.edu.my/321/ http://ieeexplore.ieee.org/document/7336543/
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spelling	my-inti-eprints.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
institution	INTI International University
building	INTI Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	INTI International University
content_source	INTI Institutional Repository
url_provider	http://eprints.intimal.edu.my
topic	QC Physics
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
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.
format	Article
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
title	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_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_sort	conditions for radiative cooling and collapse in the plasma focus illustrated with numerical experiments on pf1000
publisher	IEEE
publishDate	2016
url	http://eprints.intimal.edu.my/321/ http://ieeexplore.ieee.org/document/7336543/
_version_	1644541178226409472
score	13.251813

Conditions for Radiative Cooling and Collapse in the Plasma Focus Illustrated With Numerical Experiments on PF1000

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