Sound emission from an arc cathode

Sound waves have been detected from an electrode acting as the cathode in a vacuum discharge during electrical breakdown and subsequent arcing. Results from arcing on graphite, carbon fiber reinforced carbon, and stainless steel are reported. Distinct frequencies could be reproducibly detected in th...

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Published in:IEEE transactions on plasma science 2001-10, Vol.29 (5), p.722-725
Main Authors: Laux, M., Pursch, H.
Format: Article
Language:English
Subjects:
Breakdown
Carbon
Carbon dioxide
Cathodes
CRTs
Damping
Disturbances
Electric breakdown
Electrodes
Excitation spectra
Experiments
Frequency
Geometry
Sound
Steel
Vacuum arcs
Vacuum breakdown
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Pursch, H.
description Sound waves have been detected from an electrode acting as the cathode in a vacuum discharge during electrical breakdown and subsequent arcing. Results from arcing on graphite, carbon fiber reinforced carbon, and stainless steel are reported. Distinct frequencies could be reproducibly detected in the power spectrum belonging to different groups. Most of the modes show a strong damping demonstrating that the nonlinear disturbance associated with the breakdown excites a wide spectrum. To identify eigenoscillations of the cathode plate some experiments have been repeated using an electrode with modified geometry. Different disturbances during the lifetime of the moving arc are reflected in different selections of sound eigenmodes.
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subjects Breakdown
Carbon
Carbon dioxide
Cathodes
CRTs
Damping
Disturbances
Electric breakdown
Electrodes
Excitation spectra
Experiments
Frequency
Geometry
Sound
Steel
Vacuum arcs
Vacuum breakdown
title Sound emission from an arc cathode
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