skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Experimental Observation of the Stratified Electrothermal Instability on Aluminum with Thickness Greater than a Skin Depth

Abstract

The first direct observation of the stratified electrothermal instability on the surface of thick metal is reported. Aluminum rods coated with 70 μm Parylene-N were driven to 1 MA in approximately 100 ns, with the metal thicker than the skin depth. The dielectric coating suppressed plasma formation, enabling persistent observation of discrete azimuthally-correlated stratified structures perpendicular to the current. Strata amplitudes grow rapidly, while their Fourier spectrum shifts toward longer wavelength. Assuming blackbody emission, radiometric calculations indicate strata are temperature perturbations that grow exponentially with rate γ = 0.04 ns -1 in 3000- 10,000 K aluminum.

Authors:
 [1];  [2];  [2];  [1];  [3];  [2];  [2];  [1]
  1. Univ. of Nevada, Reno, NV (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Univ. of New Mexico, Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1429810
Report Number(s):
SAND-2017-7784J
655591
DOE Contract Number:
AC04-94AL85000
Resource Type:
Program Document
Country of Publication:
United States
Language:
English

Citation Formats

Hutchinson, Trevor M., Hutchinson, Trevor M., Awe, Thomas James, Bauer, Bruno S., Yates, Kevin, Yu, Edmund p., Yelton, William G., and Fuelling, Stephan. Experimental Observation of the Stratified Electrothermal Instability on Aluminum with Thickness Greater than a Skin Depth. United States: N. p., 2017. Web.
Hutchinson, Trevor M., Hutchinson, Trevor M., Awe, Thomas James, Bauer, Bruno S., Yates, Kevin, Yu, Edmund p., Yelton, William G., & Fuelling, Stephan. Experimental Observation of the Stratified Electrothermal Instability on Aluminum with Thickness Greater than a Skin Depth. United States.
Hutchinson, Trevor M., Hutchinson, Trevor M., Awe, Thomas James, Bauer, Bruno S., Yates, Kevin, Yu, Edmund p., Yelton, William G., and Fuelling, Stephan. Sat . "Experimental Observation of the Stratified Electrothermal Instability on Aluminum with Thickness Greater than a Skin Depth". United States. doi:.
@article{osti_1429810,
title = {Experimental Observation of the Stratified Electrothermal Instability on Aluminum with Thickness Greater than a Skin Depth},
author = {Hutchinson, Trevor M. and Hutchinson, Trevor M. and Awe, Thomas James and Bauer, Bruno S. and Yates, Kevin and Yu, Edmund p. and Yelton, William G. and Fuelling, Stephan},
abstractNote = {The first direct observation of the stratified electrothermal instability on the surface of thick metal is reported. Aluminum rods coated with 70 μm Parylene-N were driven to 1 MA in approximately 100 ns, with the metal thicker than the skin depth. The dielectric coating suppressed plasma formation, enabling persistent observation of discrete azimuthally-correlated stratified structures perpendicular to the current. Strata amplitudes grow rapidly, while their Fourier spectrum shifts toward longer wavelength. Assuming blackbody emission, radiometric calculations indicate strata are temperature perturbations that grow exponentially with rate γ = 0.04 ns -1 in 3000- 10,000 K aluminum.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}

Program Document:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item.

Save / Share: