On the Generation of Plasma Jets in the Kilojoule Plasma Focus Device

— Laser–optic methods were used to study the properties of plasma jets generated in the KJ Plasma Focus device. Measurements of the plasma jet velocity were conducted immediately after its appearance. During the first 10 ns, the average velocity is about 5 × 10 7 cm/s, which corresponds to energy of...

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Bibliographic Details
Published in:Plasma physics reports 2022, Vol.48 (4), p.346-354
Main Authors: Polukhin, S. N., Nikulin, V. Ya, Silin, P. V.
Format: Article
Language:English
Subjects:
Atomic
Focus devices
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Plasma
Plasma Dynamics
Plasma focus
Plasma jets
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Summary:— Laser–optic methods were used to study the properties of plasma jets generated in the KJ Plasma Focus device. Measurements of the plasma jet velocity were conducted immediately after its appearance. During the first 10 ns, the average velocity is about 5 × 10 7 cm/s, which corresponds to energy of 18 keV for the ions of nitrogen, which was the working gas of the PF setup. The jet density and velocity decrease manifold over distance of 2–3 cm from its generation point. The experiments confirm that the main reason of jet generation is the necking of the pinch. It was found that after the pinch decay, a new plasma column appears, which propagates in the axial direction.
ISSN:1063-780X
1562-6938
DOI:10.1134/S1063780X22040110