Dynamics of pulsed magnetron discharge in high-current electron guns

High-speed video filming is applied to investigate low-pressure (argon 0.053–0.133 Pa) pulsed gas discharge dynamics in a planar magnetron built-in the explosive emission cathode of a high-current electron gun. It has been found that, in the beginning, the discharge starts at the side surface of the...

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Bibliographic Details
Published in:Technical physics 2017-11, Vol.62 (11), p.1643-1650
Main Authors: Kiziridi, P. P., Ozur, G. E., Zyul’kova, L. A., Popov, S. A., Shevelev, S. A., Alekhin, M. A.
Format: Article
Language:English
Subjects:
CATHODES
Classical and Continuum Physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Discharge
ELECTRON GUNS
Electrons
EMISSION
High current
MAGNETIC FIELDS
MAGNETRONS
Oscillators
Physics
Physics and Astronomy
Plasma
STABILITY
SURFACES
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Summary:High-speed video filming is applied to investigate low-pressure (argon 0.053–0.133 Pa) pulsed gas discharge dynamics in a planar magnetron built-in the explosive emission cathode of a high-current electron gun. It has been found that, in the beginning, the discharge starts at the side surface of the cathode and then spreads to its face. The stability of the discharge ignition instant at the cathode face as a function of the working pressure of the gas and the cathode design has been studied. It has been found that the pulsed longitudinal magnetic field results in the discharge switching over in the axial direction onto the electron gun collector. A qualitative explanation of the observed discharge behavior has been given.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784217110147