Inverse Bremsstrahlung Absorption

Turnbull, D.; Katz, J.; Sherlock, M.; Divol, L.; Shaffer, N. R.; Strozzi, D. J.; Colaïtis, A.; Edgell, D. H.; Follett, R. K.; McMillen, K. R.; Michel, P.; Milder, A. L.; Froula, D. H.

doi:10.1103/physrevlett.130.145103

Title: Inverse Bremsstrahlung Absorption

Abstract

Inverse bremsstrahlung absorption was measured based on transmission through a finite-length plasma that was thoroughly characterized using spatially resolved Thomson scattering. Expected absorption was then calculated using the diagnosed plasma conditions while varying the absorption model components. To match data, it is necessary to account for: (1) the Langdon effect; (2) laser-frequency (rather than plasma-frequency) dependence in the Coulomb logarithm, as is typical of bremsstrahlung theories but not transport theories; and (3) a correction due to ion screening. Radiation-hydrodynamic simulations of inertial confinement fusion implosions have to date used a Coulomb logarithm from the transport literature and no screening correction. Here, we anticipate that updating the model for collisional absorption will substantially revise our understanding of laser-target coupling for such implosions.

Authors:

^[1];

^[1]; Sherlock, M. ^[2]; Divol, L. ^[2]; Shaffer, N. R. ^[1];

^[2]; Colaïtis, A. ^[3];

^[1];

^[1]; Michel, P. ^[2]; Milder, A. L. ^[4];

^[1]

Univ. of Rochester, NY (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Centre Lasers Intenses et Applications, Talence (France)
Univ. of Alberta, Edmonton, AB (Canada)

Publication Date:: Tue Apr 04 00:00:00 EDT 2023

Research Org.:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics; Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

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

OSTI Identifier:: 1969192

Alternate Identifier(s):: OSTI ID: 1972900

Report Number(s):: LLNL-JRNL-843804
Journal ID: ISSN 0031-9007; TRN: US2313388

Grant/Contract Number:: NA0003856; AC52-07NA27344

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 130; Journal Issue: 14; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Direct drive; Inertial confinement fusion; Laser light absorption in plasmas; Near-critical & underdense plasmas

Citation Formats


                    Turnbull, D., Katz, J., Sherlock, M., Divol, L., Shaffer, N. R., Strozzi, D. J., Colaïtis, A., Edgell, D. H., Follett, R. K., McMillen, K. R., Michel, P., Milder, A. L., and Froula, D. H. Inverse Bremsstrahlung Absorption.  United States: N. p., 2023. 
Web.  doi:10.1103/physrevlett.130.145103.

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                    Turnbull, D., Katz, J., Sherlock, M., Divol, L., Shaffer, N. R., Strozzi, D. J., Colaïtis, A., Edgell, D. H., Follett, R. K., McMillen, K. R., Michel, P., Milder, A. L., & Froula, D. H. Inverse Bremsstrahlung Absorption.  United States.  https://doi.org/10.1103/physrevlett.130.145103

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                    Turnbull, D., Katz, J., Sherlock, M., Divol, L., Shaffer, N. R., Strozzi, D. J., Colaïtis, A., Edgell, D. H., Follett, R. K., McMillen, K. R., Michel, P., Milder, A. L., and Froula, D. H. Tue .  
"Inverse Bremsstrahlung Absorption".  United States.  https://doi.org/10.1103/physrevlett.130.145103.  https://www.osti.gov/servlets/purl/1969192.

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@article{osti_1969192,

  title        = {Inverse Bremsstrahlung Absorption},

  author       = {Turnbull, D. and Katz, J. and Sherlock, M. and Divol, L. and Shaffer, N. R. and Strozzi, D. J. and Colaïtis, A. and Edgell, D. H. and Follett, R. K. and McMillen, K. R. and Michel, P. and Milder, A. L. and Froula, D. H.},

  abstractNote = {Inverse bremsstrahlung absorption was measured based on transmission through a finite-length plasma that was thoroughly characterized using spatially resolved Thomson scattering. Expected absorption was then calculated using the diagnosed plasma conditions while varying the absorption model components. To match data, it is necessary to account for: (1) the Langdon effect; (2) laser-frequency (rather than plasma-frequency) dependence in the Coulomb logarithm, as is typical of bremsstrahlung theories but not transport theories; and (3) a correction due to ion screening. Radiation-hydrodynamic simulations of inertial confinement fusion implosions have to date used a Coulomb logarithm from the transport literature and no screening correction. Here, we anticipate that updating the model for collisional absorption will substantially revise our understanding of laser-target coupling for such implosions.},

  doi          = {10.1103/physrevlett.130.145103},

  journal      = {Physical Review Letters},

  number       = 14,

  volume       = 130,

  place        = {United States},

  year         = {Tue Apr 04 00:00:00 EDT 2023},

  month        = {Tue Apr 04 00:00:00 EDT 2023}

}

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Works referenced in this record:

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Title: Inverse Bremsstrahlung Absorption

Abstract

Citation Formats

Emission, Absorption, and Conductivity of a Fully Ionized Gas at Radio Frequencies journal, October 1961

Tripled yield in direct-drive laser fusion through statistical modelling journal, January 2019

An electron conductivity model for dense plasmas journal, January 1984

Application of lasers to the production of high-temperature and high-pressure plasma journal, April 1968

Approximation Formulas for Nonrelativistic Bremsstrahlung and Average Gaunt Factors for a Maxwellian Electron Gas journal, July 1962

Direct Measurement of the Return Current Instability in a Laser-Produced Plasma journal, September 2022

Beam Spray Thresholds in ICF-Relevant Plasmas journal, July 2022

Ab initio calculation of the non-relativistic free–free Gaunt factor incorporating plasma screening journal, March 2014

High-Frequency Conductivity and the Emission and Absorption Coefficients of a Fully Ionized Plasma journal, January 1962

Classical molecular dynamic simulations and modeling of inverse bremsstrahlung heating in low Z weakly coupled plasmas journal, July 2022

Impact of the Langdon effect on crossed-beam energy transfer journal, December 2019

Non-Maxwellian electron distributions and continuum X-ray emission in inverse Bremsstrahlung heated plasmas journal, November 1988

Cross-Beam Energy Transfer Saturation by Ion Heating journal, February 2021

Molecular-Dynamics Simulations of Electron-Ion Temperature Relaxation in a Classical Coulomb Plasma journal, September 2008

Analytical formulae for the inverse bremsstrahlung absorption coefficient journal, December 1974

FLYCHK: Generalized population kinetics and spectral model for rapid spectroscopic analysis for all elements journal, December 2005

Correct values for high-frequency power absorption by inverse bremsstrahlung in plasmas journal, January 1973

Nonlinear Inverse Bremsstrahlung and Heated-Electron Distributions journal, March 1980

Two-dimensional simulations of plastic-shell, direct-drive implosions on OMEGA journal, March 2005

Direct calculation of inverse-bremsstrahlung absorption in strongly coupled, nonlinearly driven laser plasmas journal, April 1998

A reflective optical transport system for ultraviolet Thomson scattering from electron plasma waves on OMEGA journal, October 2012

Isolating and quantifying cross-beam energy transfer in direct-drive implosions on OMEGA and the National Ignition Facility journal, May 2016

Effect of laser illumination nonuniformity on the analysis of time-resolved x-ray measurements in uv spherical transport experiments journal, October 1987

A transmitted-beam diagnostic for the wavelength-tunable UV drive beam on OMEGA journal, March 2021

‘‘Coulomb logarithm’’ for inverse-bremsstrahlung laser absorption journal, December 1987

Accurate determination of the free–free Gaunt factor – I. Non-relativistic Gaunt factors journal, August 2014

Nonrelativistic Electron–Ion Bremsstrahlung: An Approximate Formula for All Parameters journal, November 2021

Measurement of laser absorption in underdense plasmas using near-field imaging of the incident and transmitted beams journal, December 2022

Verfahren zur näherungsweisen Anpassung einer Lösung der Schrödinger- an die Diracgleichung journal, January 1935

Refractive Index Seen by a Probe Beam Interacting with a Laser-Plasma System journal, January 2017

Electron Radiative Transitions in a Coulomb Field. journal, May 1961

Effect of Ion Correlations on High-Frequency Plasma Conductivity journal, January 1963

Polynomial fit to the Coulomb logarithm for inverse bremsstrahlung journal, December 1985

Crossed-beam energy transfer in implosion experiments on OMEGA journal, December 2010

Computation of free-free Gaunt factors and conductive opacities in hot matter journal, October 1979

Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating journal, June 2021

Effects of electron-ion temperature equilibration on inertial confinement fusion implosions journal, July 2011

Emission, Absorption, and Conductivity of a Fully Ionized Gas at Radio Frequencies
journal, October 1961

Tripled yield in direct-drive laser fusion through statistical modelling
journal, January 2019

An electron conductivity model for dense plasmas
journal, January 1984

Application of lasers to the production of high-temperature and high-pressure plasma
journal, April 1968

Approximation Formulas for Nonrelativistic Bremsstrahlung and Average Gaunt Factors for a Maxwellian Electron Gas
journal, July 1962

Direct Measurement of the Return Current Instability in a Laser-Produced Plasma
journal, September 2022

Beam Spray Thresholds in ICF-Relevant Plasmas
journal, July 2022

Ab initio calculation of the non-relativistic free–free Gaunt factor incorporating plasma screening
journal, March 2014

High-Frequency Conductivity and the Emission and Absorption Coefficients of a Fully Ionized Plasma
journal, January 1962

Classical molecular dynamic simulations and modeling of inverse bremsstrahlung heating in low Z weakly coupled plasmas
journal, July 2022

Impact of the Langdon effect on crossed-beam energy transfer
journal, December 2019

Non-Maxwellian electron distributions and continuum X-ray emission in inverse Bremsstrahlung heated plasmas
journal, November 1988

Cross-Beam Energy Transfer Saturation by Ion Heating
journal, February 2021

Molecular-Dynamics Simulations of Electron-Ion Temperature Relaxation in a Classical Coulomb Plasma
journal, September 2008

Analytical formulae for the inverse bremsstrahlung absorption coefficient
journal, December 1974

FLYCHK: Generalized population kinetics and spectral model for rapid spectroscopic analysis for all elements
journal, December 2005

Correct values for high-frequency power absorption by inverse bremsstrahlung in plasmas
journal, January 1973

Nonlinear Inverse Bremsstrahlung and Heated-Electron Distributions
journal, March 1980

Two-dimensional simulations of plastic-shell, direct-drive implosions on OMEGA
journal, March 2005

Direct calculation of inverse-bremsstrahlung absorption in strongly coupled, nonlinearly driven laser plasmas
journal, April 1998

A reflective optical transport system for ultraviolet Thomson scattering from electron plasma waves on OMEGA
journal, October 2012

Isolating and quantifying cross-beam energy transfer in direct-drive implosions on OMEGA and the National Ignition Facility
journal, May 2016

Effect of laser illumination nonuniformity on the analysis of time-resolved x-ray measurements in uv spherical transport experiments
journal, October 1987

A transmitted-beam diagnostic for the wavelength-tunable UV drive beam on OMEGA
journal, March 2021

‘‘Coulomb logarithm’’ for inverse-bremsstrahlung laser absorption
journal, December 1987

Accurate determination of the free–free Gaunt factor – I. Non-relativistic Gaunt factors
journal, August 2014

Nonrelativistic Electron–Ion Bremsstrahlung: An Approximate Formula for All Parameters
journal, November 2021

Measurement of laser absorption in underdense plasmas using near-field imaging of the incident and transmitted beams
journal, December 2022

Verfahren zur näherungsweisen Anpassung einer Lösung der Schrödinger- an die Diracgleichung
journal, January 1935

Refractive Index Seen by a Probe Beam Interacting with a Laser-Plasma System
journal, January 2017

Electron Radiative Transitions in a Coulomb Field.
journal, May 1961

Effect of Ion Correlations on High-Frequency Plasma Conductivity
journal, January 1963

Polynomial fit to the Coulomb logarithm for inverse bremsstrahlung
journal, December 1985

Crossed-beam energy transfer in implosion experiments on OMEGA
journal, December 2010

Computation of free-free Gaunt factors and conductive opacities in hot matter
journal, October 1979

Measurements of Non-Maxwellian Electron Distribution Functions and Their Effect on Laser Heating
journal, June 2021

Effects of electron-ion temperature equilibration on inertial confinement fusion implosions
journal, July 2011