On the relative importance of the different initial conditions that seed the electrothermal instability

Electrothermal instability is responsible for degrading numerous applications of pulsed-power technology, yet the initial conditions from which it grows are not well understood. For the first time, metal surfaces have been tracked from characterization to self-emission. This reveals no clear correla...

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Bibliographic Details
Published in:Journal of applied physics 2021-10, Vol.130 (15)
Main Authors: Hutchinson, T. M., Awe, T. J., Bauer, B. S., Hutsel, B. T., Yager-Elorriaga, D. A., Yates, K. C., Klemmer, A. W., Hatch, M. W., Kreher, S. E., Yu, E. P., Gilmore, M.
Format: Article
Language:English
Subjects:
Applied physics
Crystal defects
Crystallography
electronic and electrical engineering
ENGINEERING
Initial conditions
Metal surfaces
Metallurgy
optics and optical instruments
particle accelerators
Perturbation
physics
plasma physics
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Summary:Electrothermal instability is responsible for degrading numerous applications of pulsed-power technology, yet the initial conditions from which it grows are not well understood. For the first time, metal surfaces have been tracked from characterization to self-emission. This reveals no clear correlation between non-uniform thermal emissions and surface metallurgical defects or crystallographic grains, while correlations are observed with surface topography for 5N metal but not 6061 metal. For 5N metal, surfaces with average roughness as small as 5 nm still admit thermal perturbations with δ T / T > 0.1.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0063160