Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton

The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron and ion beams and fusion neutrons when operated in deuterium. The 5-phase Lee Model code has been developed for the focus operated in various gases including D, D–T, He, Ne, N, O, Ar, Kr and Xe. Radiatio...

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Main Authors:	Lee, S., Saw, S. H., Ali, Jalil
Format:	Article
Language:	English
Published:	Springer US 2013
Subjects:	QC Physics
Online Access:	http://eprints.intimal.edu.my/76/ http://eprints.intimal.edu.my/76/ http://eprints.intimal.edu.my/76/1/Numerical%20experiments%20on%20radiative%20cooling%20and%20collapse%20in%20plasma%20focus%20operated%20in%20Krypton.pdf

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spelling	intimal-762016-10-06T06:58:30Z http://eprints.intimal.edu.my/76/ Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton Lee, S. Saw, S. H. Ali, Jalil QC Physics The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron and ion beams and fusion neutrons when operated in deuterium. The 5-phase Lee Model code has been developed for the focus operated in various gases including D, D–T, He, Ne, N, O, Ar, Kr and Xe. Radiation-coupled motion is included in the modelling. In this paper we look at the effect of radiation cooling and radiation collapse in krypton. The Pease–Braginskii current is that current flowing in a hydrogen pinch which is just large enough for the Bremsstrahlung to balance Joule heating. This radiation-cooled threshold current for a hydrogen pinch is 1.6 MA. It is known that in gases undergoing line radiation strongly the radiation-cooled threshold current is considerably lowered. We show that the equations of the Lee Model code may be used to compute this lowering. The code also shows the effect of radiation cooling leading to radiative collapse. Numerical experiments based on experimentally fitted model parameters are run to demonstrate a regime in which radiation collapse is observed in Kr at a pinch current of 50–100 kA. Springer US 2013 Article PeerReviewed text en http://eprints.intimal.edu.my/76/1/Numerical%20experiments%20on%20radiative%20cooling%20and%20collapse%20in%20plasma%20focus%20operated%20in%20Krypton.pdf Lee, S. and Saw, S. H. and Ali, Jalil (2013) Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton. Journal of Fusion Energy, 32 (1). pp. 42-49. ISSN 1572-9591 10.1007/s10894-012-9522-8
repository_type	Digital Repository
institution_category	Local University
institution	INTI International University
building	INTI Institutional Repository
collection	Online Access
language	English
topic	QC Physics
spellingShingle	QC Physics Lee, S. Saw, S. H. Ali, Jalil Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
description	The Plasma Focus has wide-ranging applications due to its intense radiation of SXR, XR, electron and ion beams and fusion neutrons when operated in deuterium. The 5-phase Lee Model code has been developed for the focus operated in various gases including D, D–T, He, Ne, N, O, Ar, Kr and Xe. Radiation-coupled motion is included in the modelling. In this paper we look at the effect of radiation cooling and radiation collapse in krypton. The Pease–Braginskii current is that current flowing in a hydrogen pinch which is just large enough for the Bremsstrahlung to balance Joule heating. This radiation-cooled threshold current for a hydrogen pinch is 1.6 MA. It is known that in gases undergoing line radiation strongly the radiation-cooled threshold current is considerably lowered. We show that the equations of the Lee Model code may be used to compute this lowering. The code also shows the effect of radiation cooling leading to radiative collapse. Numerical experiments based on experimentally fitted model parameters are run to demonstrate a regime in which radiation collapse is observed in Kr at a pinch current of 50–100 kA.
format	Article
author	Lee, S. Saw, S. H. Ali, Jalil
author_facet	Lee, S. Saw, S. H. Ali, Jalil
author_sort	Lee, S.
title	Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
title_short	Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
title_full	Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
title_fullStr	Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
title_full_unstemmed	Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton
title_sort	numerical experiments on radiative cooling and collapse in plasma focus operated in krypton
publisher	Springer US
publishDate	2013
url	http://eprints.intimal.edu.my/76/ http://eprints.intimal.edu.my/76/ http://eprints.intimal.edu.my/76/1/Numerical%20experiments%20on%20radiative%20cooling%20and%20collapse%20in%20plasma%20focus%20operated%20in%20Krypton.pdf
first_indexed	2018-09-05T09:06:05Z
last_indexed	2018-09-05T09:06:05Z
_version_	1610757823089606656

Numerical experiments on radiative cooling and collapse in plasma focus operated in Krypton

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