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

This content will become publicly available on September 12, 2020

Title: The effects of surface roughness on specular diagnostics in shocked experiments

Abstract

Many shock experiments, whether impact, laser, or magnetically driven, use reflected optical light from shocked samples to diagnose their material properties. Specifically, optical velocimetry diagnostics, which do not require absolute power measurements, are regularly used to obtain equation-of-state information of materials. However, new diagnostics will be necessary to expand the realm of measured material properties, and many useful diagnostic techniques do require absolute measurements. Thus, it is important to understand what happens at the reflective surface of shock experiments, and the effect scattering has on the light collection of optical probes. To this end, we present results from experiments done to observe the behavior of a reflected beam from a specular coating on an optical window during shock impact. We find that the specular condition of the coating is adversely affected by the shock front, but this can be mitigated by minimizing roughness on the surface preceding the coating.

Authors:
 [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Texas, Austin, TX (United States)
  2. Sandia National Lab. (SNL-NM), 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:
1570274
Alternate Identifier(s):
OSTI ID: 1561387
Report Number(s):
[SAND-2019-11293J]
[Journal ID: ISSN 0034-6748; 679695]
Grant/Contract Number:  
[AC04-94AL85000; NA0003525]
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
[ Journal Volume: 90; Journal Issue: 9]; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Grant, Sean, and Ao, Tommy. The effects of surface roughness on specular diagnostics in shocked experiments. United States: N. p., 2019. Web. doi:10.1063/1.5115144.
Grant, Sean, & Ao, Tommy. The effects of surface roughness on specular diagnostics in shocked experiments. United States. doi:10.1063/1.5115144.
Grant, Sean, and Ao, Tommy. Thu . "The effects of surface roughness on specular diagnostics in shocked experiments". United States. doi:10.1063/1.5115144.
@article{osti_1570274,
title = {The effects of surface roughness on specular diagnostics in shocked experiments},
author = {Grant, Sean and Ao, Tommy},
abstractNote = {Many shock experiments, whether impact, laser, or magnetically driven, use reflected optical light from shocked samples to diagnose their material properties. Specifically, optical velocimetry diagnostics, which do not require absolute power measurements, are regularly used to obtain equation-of-state information of materials. However, new diagnostics will be necessary to expand the realm of measured material properties, and many useful diagnostic techniques do require absolute measurements. Thus, it is important to understand what happens at the reflective surface of shock experiments, and the effect scattering has on the light collection of optical probes. To this end, we present results from experiments done to observe the behavior of a reflected beam from a specular coating on an optical window during shock impact. We find that the specular condition of the coating is adversely affected by the shock front, but this can be mitigated by minimizing roughness on the surface preceding the coating.},
doi = {10.1063/1.5115144},
journal = {Review of Scientific Instruments},
number = [9],
volume = [90],
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on September 12, 2020
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Implementation of single-shot ellipsometry on gas gun experiments
conference, January 2017

  • Grant, Sean; Ao, Tommy; Bernstein, Aaron
  • SHOCK COMPRESSION OF CONDENSED MATTER - 2015: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, AIP Conference Proceedings
  • DOI: 10.1063/1.4971565

Free-surface optical scattering as an indicator of the shock-induced solid-liquid phase transition in tin
journal, July 2008

  • Stevens, G. D.; Lutz, S. S.; Marshall, B. R.
  • Journal of Applied Physics, Vol. 104, Issue 1
  • DOI: 10.1063/1.2953092

Laser interferometer for measuring high velocities of any reflecting surface
journal, November 1972

  • Barker, L. M.; Hollenbach, R. E.
  • Journal of Applied Physics, Vol. 43, Issue 11
  • DOI: 10.1063/1.1660986

Compact system for high-speed velocimetry using heterodyne techniques
journal, August 2006

  • Strand, O. T.; Goosman, D. R.; Martinez, C.
  • Review of Scientific Instruments, Vol. 77, Issue 8
  • DOI: 10.1063/1.2336749

Release path temperatures of shock-compressed tin from dynamic reflectance and radiance measurements
journal, August 2013

  • La Lone, B. M.; Stevens, G. D.; Turley, W. D.
  • Journal of Applied Physics, Vol. 114, Issue 6
  • DOI: 10.1063/1.4817764