Dynamic absorption in optical pyrometry of hot spots in plastic-bonded triaminotrinitrobenzene [Optical Pyrometry of Shock-induced Hot Spots in Plastic-bonded Triaminotrinitrobenzene]
Abstract
Herein we demonstrate a methodology for measuring optical pyrometry in environments which are disadvantageous for typical pyrometery applications by introducing additional fit parameters to account for absorption or emission which convolutes the thermal spectrum. Emission spectra from a plastic-bonded formulation of triaminotrinitrobenzene (TATB) shocked by 2-4 km s-1 impacts with Al flyer plates show significant deviations from graybody behavior. To extract reliable temperatures via optical pyrometry, we fit the spectra to a combination of a graybody and either a Gaussian absorption or emission spectrum. We found that the absorption needed to fit the data corresponds well with the known pressure-dependent absorption of TATB, and that the absorption model gives temperatures and emissivities in line with other explosives. By contrast, emission gives temperatures too low and emissivities that decrease as more material reacts. We conclude the nonthermal part of the spectrum is dominated by the absorption of unreacted TATB, and accurate pyrometry of TATB must use either our graybody plus absorption model or must limit the spectral range of observation to above 650 nm.
- Authors:
-
[2]
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Illinois, Urbana-Champaign, IL (United States). School of Chemical Sciences and Fredrick Seitz Materials Research Lab.
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1518575
- Report Number(s):
- LLNL-JRNL-767687
Journal ID: ISSN 0003-6951; 958066
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 19; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Bassett, Will P., Johnson, Belinda P., and Dlott, Dana D. Dynamic absorption in optical pyrometry of hot spots in plastic-bonded triaminotrinitrobenzene [Optical Pyrometry of Shock-induced Hot Spots in Plastic-bonded Triaminotrinitrobenzene]. United States: N. p., 2019.
Web. doi:10.1063/1.5092984.
Bassett, Will P., Johnson, Belinda P., & Dlott, Dana D. Dynamic absorption in optical pyrometry of hot spots in plastic-bonded triaminotrinitrobenzene [Optical Pyrometry of Shock-induced Hot Spots in Plastic-bonded Triaminotrinitrobenzene]. United States. https://doi.org/10.1063/1.5092984
Bassett, Will P., Johnson, Belinda P., and Dlott, Dana D. Mon .
"Dynamic absorption in optical pyrometry of hot spots in plastic-bonded triaminotrinitrobenzene [Optical Pyrometry of Shock-induced Hot Spots in Plastic-bonded Triaminotrinitrobenzene]". United States. https://doi.org/10.1063/1.5092984. https://www.osti.gov/servlets/purl/1518575.
@article{osti_1518575,
title = {Dynamic absorption in optical pyrometry of hot spots in plastic-bonded triaminotrinitrobenzene [Optical Pyrometry of Shock-induced Hot Spots in Plastic-bonded Triaminotrinitrobenzene]},
author = {Bassett, Will P. and Johnson, Belinda P. and Dlott, Dana D.},
abstractNote = {Herein we demonstrate a methodology for measuring optical pyrometry in environments which are disadvantageous for typical pyrometery applications by introducing additional fit parameters to account for absorption or emission which convolutes the thermal spectrum. Emission spectra from a plastic-bonded formulation of triaminotrinitrobenzene (TATB) shocked by 2-4 km s-1 impacts with Al flyer plates show significant deviations from graybody behavior. To extract reliable temperatures via optical pyrometry, we fit the spectra to a combination of a graybody and either a Gaussian absorption or emission spectrum. We found that the absorption needed to fit the data corresponds well with the known pressure-dependent absorption of TATB, and that the absorption model gives temperatures and emissivities in line with other explosives. By contrast, emission gives temperatures too low and emissivities that decrease as more material reacts. We conclude the nonthermal part of the spectrum is dominated by the absorption of unreacted TATB, and accurate pyrometry of TATB must use either our graybody plus absorption model or must limit the spectral range of observation to above 650 nm.},
doi = {10.1063/1.5092984},
journal = {Applied Physics Letters},
number = 19,
volume = 114,
place = {United States},
year = {Mon May 13 00:00:00 EDT 2019},
month = {Mon May 13 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Shock Initiation Microscopy with High Time and Space Resolution
journal, November 2019
- Bassett, Will P.; Johnson, Belinda P.; Salvati, Lawrence
- Propellants, Explosives, Pyrotechnics, Vol. 45, Issue 2
Hot Spot Chemistry in Several Polymer‐Bound Explosives under Nanosecond Shock Conditions
journal, November 2019
- Bassett, Will P.; Johnson, Belinda P.; Dlott, Dana D.
- Propellants, Explosives, Pyrotechnics, Vol. 45, Issue 2