Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24

A series of experiments were carried out using the middle energy (dense) plasma focus device PF-24 with deuterium as a working gas under pressure in a range between 2 and 5 mbar for 17 kV of charging voltage. The relationship between these operating deuterium pressures in reference to the total neut...

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Main Authors:	Łukasz, Marciniak, Mohamad, Akel, Agnieszka, Kulińsk, Scholz, Marek, Hans-Joachim, Kunze, Lee, Sing, Saw, Sor Heoh
Format:	Article
Published:	Springer 2018
Subjects:	QC Physics
Online Access:	http://eprints.intimal.edu.my/1060/ http://eprints.intimal.edu.my/1060/ http://eprints.intimal.edu.my/1060/

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recordtype	eprints
spelling	intimal-10602018-07-26T06:04:55Z http://eprints.intimal.edu.my/1060/ Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24 Łukasz, Marciniak Mohamad, Akel Agnieszka, Kulińsk Scholz, Marek Hans-Joachim, Kunze Lee, Sing Saw, Sor Heoh QC Physics A series of experiments were carried out using the middle energy (dense) plasma focus device PF-24 with deuterium as a working gas under pressure in a range between 2 and 5 mbar for 17 kV of charging voltage. The relationship between these operating deuterium pressures in reference to the total neutron yield (Yn) was estimated. The 5-phase Lee code was used to simulate the measured discharge current and neutron yield (Yn) using a phenomenological beam-target neutron generating mechanism, which was incorporated in the model. Comparison of the Yn versus pressure using fitted model parameters was made at each point of pressure. The good agreement between measured and computed Yn values was achieved for discharges with lower neutron emission. The measured Yn (below 2.6 × 109 n/discharge—the median value) has been reproducible by the model for 73% of simulated discharges, while above the median value its prediction were incorrect. The kinetic plasma parameters which were measured and computed using the Lee code for different pressures are: the time to a current sheath collapse (tc), the average axial current sheath velocity (vz) and the so called velocity factor (RF). Good agreement was found in the whole range of deuterium pressures between the computed and measured results for these kinematic quantities. Presented findings in this work suggest that the character of neutron emission is more complex than it would seem from classical interpretation of neutron production based on a beam-target model. Springer 2018 Article PeerReviewed Łukasz, Marciniak and Mohamad, Akel and Agnieszka, Kulińsk and Scholz, Marek and Hans-Joachim, Kunze and Lee, Sing and Saw, Sor Heoh (2018) Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24. Journal of Fusion Energy, 37 (2-3). pp. 124-129. ISSN 1572-9591 https://link.springer.com/article/10.1007/s10894-018-0157-2 https://doi.org/10.1007/s10894-018-0157-2
repository_type	Digital Repository
institution_category	Local University
institution	INTI International University
building	INTI Institutional Repository
collection	Online Access
topic	QC Physics
spellingShingle	QC Physics Łukasz, Marciniak Mohamad, Akel Agnieszka, Kulińsk Scholz, Marek Hans-Joachim, Kunze Lee, Sing Saw, Sor Heoh Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
description	A series of experiments were carried out using the middle energy (dense) plasma focus device PF-24 with deuterium as a working gas under pressure in a range between 2 and 5 mbar for 17 kV of charging voltage. The relationship between these operating deuterium pressures in reference to the total neutron yield (Yn) was estimated. The 5-phase Lee code was used to simulate the measured discharge current and neutron yield (Yn) using a phenomenological beam-target neutron generating mechanism, which was incorporated in the model. Comparison of the Yn versus pressure using fitted model parameters was made at each point of pressure. The good agreement between measured and computed Yn values was achieved for discharges with lower neutron emission. The measured Yn (below 2.6 × 109 n/discharge—the median value) has been reproducible by the model for 73% of simulated discharges, while above the median value its prediction were incorrect. The kinetic plasma parameters which were measured and computed using the Lee code for different pressures are: the time to a current sheath collapse (tc), the average axial current sheath velocity (vz) and the so called velocity factor (RF). Good agreement was found in the whole range of deuterium pressures between the computed and measured results for these kinematic quantities. Presented findings in this work suggest that the character of neutron emission is more complex than it would seem from classical interpretation of neutron production based on a beam-target model.
format	Article
author	Łukasz, Marciniak Mohamad, Akel Agnieszka, Kulińsk Scholz, Marek Hans-Joachim, Kunze Lee, Sing Saw, Sor Heoh
author_facet	Łukasz, Marciniak Mohamad, Akel Agnieszka, Kulińsk Scholz, Marek Hans-Joachim, Kunze Lee, Sing Saw, Sor Heoh
author_sort	Łukasz, Marciniak
title	Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
title_short	Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
title_full	Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
title_fullStr	Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
title_full_unstemmed	Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24
title_sort	measurements and simulations of neutron emission versus deuterium filling pressure in plasma focus device pf-24
publisher	Springer
publishDate	2018
url	http://eprints.intimal.edu.my/1060/ http://eprints.intimal.edu.my/1060/ http://eprints.intimal.edu.my/1060/
first_indexed	2018-09-05T09:14:24Z
last_indexed	2018-09-05T09:14:24Z
_version_	1610758347113365504

Measurements and Simulations of Neutron Emission Versus Deuterium Filling Pressure in Plasma Focus Device PF-24

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