The Hugoniot and chemistry of ablator plastic below 100 GPa

Akin, M. C.; Fratanduono, D. E.; Chau, R.

doi:10.1063/1.4940371

Title: The Hugoniot and chemistry of ablator plastic below 100 GPa

Abstract

The equation of state of glow discharge polymer (GDP) was measured to high precision using the two-stage light gas gun at Lawrence Livermore National Laboratory at pressures up to 70 GPa. Both absolute measurements and impedance matching techniques were used to determine the principal and secondary Hugoniots. GDP likely reacts at about 30 GPa, demonstrated by specific emission at 450 nm coupled with changes to the Hugoniot and reshock points. As a result of these reactions, the shock pressure in GDP evolves in time, leading to a possible decrease in pressure as compression increases, or negative compressibility, and causing complex pressure profiles within the plastic. Velocity wave profile variation was observed as a function of position on each shot, suggesting some internal variation of GDP may be present, which would be consistent with previous observations. The complex temporal and possibly structural evolution of GDP under shock compression suggests that calculations of compression and pressure based upon bulk or mean measurements may lead to artificially low pressures and high compressions. Evidence for this includes a large shift in calculating reshock pressures based on the reflected Hugoniot. In conclusion, these changes also suggest other degradation mechanisms for inertial confinement fusion implosions.

Authors:

Akin, M. C. ^[1]; Fratanduono, D. E. ^[1]; Chau, R. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Publication Date:: Mon Jan 25 00:00:00 EST 2016

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1440723

Alternate Identifier(s):: OSTI ID: 1235802

Report Number(s):: LLNL-JRNL-671588
Journal ID: ISSN 0021-8979; JAPIAU; 783285; TRN: US1900763

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 119; Journal Issue: 4; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats


                    Akin, M. C., Fratanduono, D. E., and Chau, R. The Hugoniot and chemistry of ablator plastic below 100 GPa.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4940371.

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                    Akin, M. C., Fratanduono, D. E., & Chau, R. The Hugoniot and chemistry of ablator plastic below 100 GPa.  United States.  https://doi.org/10.1063/1.4940371

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                    Akin, M. C., Fratanduono, D. E., and Chau, R. Mon .  
"The Hugoniot and chemistry of ablator plastic below 100 GPa".  United States.  https://doi.org/10.1063/1.4940371.  https://www.osti.gov/servlets/purl/1440723.

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@article{osti_1440723,

  title        = {The Hugoniot and chemistry of ablator plastic below 100 GPa},

  author       = {Akin, M. C. and Fratanduono, D. E. and Chau, R.},

  abstractNote = {The equation of state of glow discharge polymer (GDP) was measured to high precision using the two-stage light gas gun at Lawrence Livermore National Laboratory at pressures up to 70 GPa. Both absolute measurements and impedance matching techniques were used to determine the principal and secondary Hugoniots. GDP likely reacts at about 30 GPa, demonstrated by specific emission at 450 nm coupled with changes to the Hugoniot and reshock points. As a result of these reactions, the shock pressure in GDP evolves in time, leading to a possible decrease in pressure as compression increases, or negative compressibility, and causing complex pressure profiles within the plastic. Velocity wave profile variation was observed as a function of position on each shot, suggesting some internal variation of GDP may be present, which would be consistent with previous observations. The complex temporal and possibly structural evolution of GDP under shock compression suggests that calculations of compression and pressure based upon bulk or mean measurements may lead to artificially low pressures and high compressions. Evidence for this includes a large shift in calculating reshock pressures based on the reflected Hugoniot. In conclusion, these changes also suggest other degradation mechanisms for inertial confinement fusion implosions.},

  doi          = {10.1063/1.4940371},

  journal      = {Journal of Applied Physics},

  number       = 4,

  volume       = 119,

  place        = {United States},

  year         = {Mon Jan 25 00:00:00 EST 2016},

  month        = {Mon Jan 25 00:00:00 EST 2016}

}

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Title: The Hugoniot and chemistry of ablator plastic below 100 GPa

Abstract

Citation Formats

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Equation of state of Al, Cu, Mo, and Pb at shock pressures up to 2.4 TPa (24 Mbar) journal, March 1991

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Optical properties of highly compressed polystyrene using laser-driven shockwaves journal, July 2003

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Effects of pressure and ambient species on the orientational ordering in solid C 60 journal, February 1993

Shock Hugoniot of single crystal copper journal, January 2010

Diagnostic system of the Lawrence Livermore National Laboratory two‐stage light‐gas gun journal, March 1981

Adiabatic release measurements in α -quartz between 300 and 1200 GPa: Characterization of α -quartz as a shock standard in the multimegabar regime journal, November 2013

Implosion dynamics measurements at the National Ignition Facility journal, December 2012

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Shock propagation, preheat, and x-ray burnthrough in indirect-drive inertial confinement fusion ablator materials journal, May 2004

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Shock timing experiments on the National Ignition Facility: Initial results and comparison with simulation journal, April 2012

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Molecular dynamics study of shock-induced chemistry in small condensed-phase hydrocarbons
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Accuracy limits and window corrections for photon Doppler velocimetry
journal, January 2007

Observations on shock induced chemistry of cyclohexane
journal, July 2013

Progress towards ignition on the National Ignition Facility
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Shock-induced carbonization of phenanthrene at pressures of 7.9–32 GPa
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Decomposition of alkanes at high pressures and temperatures
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High-permeability fluorinated polyimide microcapsules by vapor deposition polymerization
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Electron dynamics of shocked polyethylene crystal
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The effect of shock dynamics on compressibility of ignition-scale National Ignition Facility implosions
journal, November 2014

Point design targets, specifications, and requirements for the 2010 ignition campaign on the National Ignition Facility
journal, May 2011

Dual‐beam, double‐pass absorption spectroscopy of shocked materials
journal, February 1993

Capsule-areal-density asymmetries inferred from 14.7-MeV deuterium–helium protons in direct-drive OMEGA implosions
journal, May 2003

Equation of state of Al, Cu, Mo, and Pb at shock pressures up to 2.4 TPa (24 Mbar)
journal, March 1991

Hugoniot and mean ionization of laser-shocked Ge-doped plastic
journal, December 2013

Free-surface light emission from shocked Teflon
conference, January 1994

Thermophysical properties for shock compressed polystyrene
journal, August 2011

Shock-Wave Compression of Carbonyl Compounds
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Optical properties of highly compressed polystyrene using laser-driven shockwaves
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Effects of pressure and ambient species on the orientational ordering in solid $C_{60}$
journal, February 1993

Shock Hugoniot of single crystal copper
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Diagnostic system of the Lawrence Livermore National Laboratory two‐stage light‐gas gun
journal, March 1981

Adiabatic release measurements in $α$ -quartz between 300 and 1200 GPa: Characterization of $α$ -quartz as a shock standard in the multimegabar regime
journal, November 2013

Implosion dynamics measurements at the National Ignition Facility
journal, December 2012

Study of direct-drive, deuterium–tritium gas-filled plastic capsule implosions using nuclear diagnostics at OMEGA
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