Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA

Cao, D.; Boehly, T. R.; Gregor, M. C.; Polsin, D. N.; Davis, A. K.; Radha, P. B.; Regan, S. P.; Goncharov, V. N.

doi:10.1063/1.5022992

Title: Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA

Abstract

Using temporally shaped laser pulses, multiple shocks can be launched in direct-drive inertial confinement fusion implosion experiments to set the shell on a desired isentrope or adiabat. The velocity of the first shock and the times at which subsequent shocks catch up to it are measured through the VISAR diagnostic on OMEGA. Simulations reproduce these velocity and shock-merger time measurements when using laser pulses designed for setting mid-adiabat (α ~ 3) implosions, but agreement degrades for lower-adiabat (α ~ 1) designs. Several possibilities for this difference are studied: errors in placing the target at the center of irradiation (target offset), variations in energy between the different incident beams (power imbalance), and errors in modeling the laser energy coupled into the capsule. Simulation results indicate that shock timing is most sensitive to details of the density and temperature profiles in the coronal plasma, which influences the laser energy coupled into the target, and only marginally sensitive to target offset and beam power imbalance. A new technique under development to infer coronal profiles using x-ray self-emission imaging can be applied to the pulse shapes used in shock-timing experiments. In conclusion, this will help identify improved physics models to implement in codes andmore »« less

Authors:

Cao, D. ^[1]; Boehly, T. R. ^[1]; Gregor, M. C. ^[1];

^[1];

^[1]; Radha, P. B. ^[1]; Regan, S. P. ^[1]; Goncharov, V. N. ^[1]

Univ. of Rochester, Rochester, NY (United States)

Publication Date:: Wed May 16 00:00:00 EDT 2018

Research Org.:: Univ. of Rochester, NY (United States)

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

OSTI Identifier:: 1457362

Alternate Identifier(s):: OSTI ID: 1437337

Grant/Contract Number:: NA0001944

Resource Type:: Accepted Manuscript

Journal Name:: Physics of Plasmas

Additional Journal Information:: Journal Volume: 25; Journal Issue: 5; Journal ID: ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Cao, D., Boehly, T. R., Gregor, M. C., Polsin, D. N., Davis, A. K., Radha, P. B., Regan, S. P., and Goncharov, V. N. Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5022992.

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                    Cao, D., Boehly, T. R., Gregor, M. C., Polsin, D. N., Davis, A. K., Radha, P. B., Regan, S. P., & Goncharov, V. N. Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA.  United States.  https://doi.org/10.1063/1.5022992

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                    Cao, D., Boehly, T. R., Gregor, M. C., Polsin, D. N., Davis, A. K., Radha, P. B., Regan, S. P., and Goncharov, V. N. Wed .  
"Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA".  United States.  https://doi.org/10.1063/1.5022992.  https://www.osti.gov/servlets/purl/1457362.

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@article{osti_1457362,

  title        = {Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA},

  author       = {Cao, D. and Boehly, T. R. and Gregor, M. C. and Polsin, D. N. and Davis, A. K. and Radha, P. B. and Regan, S. P. and Goncharov, V. N.},

  abstractNote = {Using temporally shaped laser pulses, multiple shocks can be launched in direct-drive inertial confinement fusion implosion experiments to set the shell on a desired isentrope or adiabat. The velocity of the first shock and the times at which subsequent shocks catch up to it are measured through the VISAR diagnostic on OMEGA. Simulations reproduce these velocity and shock-merger time measurements when using laser pulses designed for setting mid-adiabat (α ~ 3) implosions, but agreement degrades for lower-adiabat (α ~ 1) designs. Several possibilities for this difference are studied: errors in placing the target at the center of irradiation (target offset), variations in energy between the different incident beams (power imbalance), and errors in modeling the laser energy coupled into the capsule. Simulation results indicate that shock timing is most sensitive to details of the density and temperature profiles in the coronal plasma, which influences the laser energy coupled into the target, and only marginally sensitive to target offset and beam power imbalance. A new technique under development to infer coronal profiles using x-ray self-emission imaging can be applied to the pulse shapes used in shock-timing experiments. In conclusion, this will help identify improved physics models to implement in codes and consequently enhance shock-timing predictive capability for low-adiabat pulses.},

  doi          = {10.1063/1.5022992},

  journal      = {Physics of Plasmas},

  number       = 5,

  volume       = 25,

  place        = {United States},

  year         = {Wed May 16 00:00:00 EDT 2018},

  month        = {Wed May 16 00:00:00 EDT 2018}

}

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Works referenced in this record:

Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility
journal, November 2004

Celliers, P. M.; Bradley, D. K.; Collins, G. W.
Review of Scientific Instruments, Vol. 75, Issue 11
DOI: 10.1063/1.1807008

Direct-drive, cryogenic target implosions on OMEGA
journal, May 2005

Marshall, F. J.; Craxton, R. S.; Delettrez, J. A.
Physics of Plasmas, Vol. 12, Issue 5
DOI: 10.1063/1.1873832

Multiple spherically converging shock waves in liquid deuterium
journal, September 2011

Boehly, T. R.; Goncharov, V. N.; Seka, W.
Physics of Plasmas, Vol. 18, Issue 9
DOI: 10.1063/1.3640805

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

Delettrez, J.; Epstein, R.; Richardson, M. C.
Physical Review A, Vol. 36, Issue 8
DOI: 10.1103/PhysRevA.36.3926

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA
journal, May 2005

Radha, P. B.; Collins, T. J. B.; Delettrez, J. A.
Physics of Plasmas, Vol. 12, Issue 5
DOI: 10.1063/1.1882333

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

Shock timing technique for the National Ignition Facility
journal, May 2001

Munro, David H.; Celliers, Peter M.; Collins, Gilbert W.
Physics of Plasmas, Vol. 8, Issue 5
DOI: 10.1063/1.1347037

First-principles equation-of-state table of deuterium for inertial confinement fusion applications
journal, December 2011

Hu, S. X.; Militzer, B.; Goncharov, V. N.
Physical Review B, Vol. 84, Issue 22
DOI: 10.1103/PhysRevB.84.224109

The instability of liquid surfaces when accelerated in a direction perpendicular to their planes. I
journal, March 1950

Taylor, Geoffrey Ingram
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 201, Issue 1065, p. 192-196
DOI: 10.1098/rspa.1950.0052

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets
journal, April 2001

Kemp, A.; Meyer-ter-Vehn, J.; Atzeni, S.
Physical Review Letters, Vol. 86, Issue 15
DOI: 10.1103/PhysRevLett.86.3336

Direct-drive laser fusion: Status and prospects
journal, May 1998

Bodner, Stephen E.; Colombant, Denis G.; Gardner, John H.
Physics of Plasmas, Vol. 5, Issue 5, p. 1901-1918
DOI: 10.1063/1.872861

The Physics of Inertial Fusion
book, January 2004

Atzeni, Stefano; Meyer-ter-Vehn, Jürgen
DOI: 10.1093/acprof:oso/9780198562641.001.0001

Early stage of implosion in inertial confinement fusion: Shock timing and perturbation evolution
journal, January 2006

Goncharov, V. N.; Gotchev, O. V.; Vianello, E.
Physics of Plasmas, Vol. 13, Issue 1
DOI: 10.1063/1.2162803

Performance of direct-drive cryogenic targets on OMEGA
journal, May 2008

Goncharov, V. N.; Sangster, T. C.; Radha, P. B.
Physics of Plasmas, Vol. 15, Issue 5
DOI: 10.1063/1.2856551

Initial performance results of the OMEGA laser system
journal, January 1997

Boehly, T. R.; Brown, D. L.; Craxton, R. S.
Optics Communications, Vol. 133, Issue 1-6
DOI: 10.1016/S0030-4018(96)00325-2

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

Robey, H. F.; Boehly, T. R.; Celliers, P. M.
Physics of Plasmas, Vol. 19, Issue 4
DOI: 10.1063/1.3694122

Three-dimensional modeling of direct-drive cryogenic implosions on OMEGA
journal, May 2016

Igumenshchev, I. V.; Goncharov, V. N.; Marshall, F. J.
Physics of Plasmas, Vol. 23, Issue 5
DOI: 10.1063/1.4948418

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets
text, January 2001

Atzeni, S.; Kemp, A.; Meyer-Ter-Vehn, J.
The American Physical Society
DOI: 10.17877/de290r-2144

Works referencing / citing this record:

Simulated refraction-enhanced X-ray radiography of laser-driven shocks
journal, March 2019

Kar, Arnab; Boehly, T. R.; Radha, P. B.
Physics of Plasmas, Vol. 26, Issue 3
DOI: 10.1063/1.5084968

Study of high-Z-coated ignition target by detailed configuration accounting atomic physics for direct-drive inertial confinement fusion
journal, November 2018

Qiao, Xiumei; Lan, Ke
Plasma Physics and Controlled Fusion, Vol. 61, Issue 1
DOI: 10.1088/1361-6587/aae2dc

Simulated Refraction-Enhanced X-Ray Radiography of Laser-Driven Shocks
text, January 2019

Kar, Arnab; Boehly, T. R.; Radha, P. B.
arXiv
DOI: 10.48550/arxiv.1903.04020

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Similar Records

Title: Theoretical quantification of shock-timing sensitivities for direct-drive inertial confinement fusion implosions on OMEGA

Abstract

Citation Formats

Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility journal, November 2004

Direct-drive, cryogenic target implosions on OMEGA journal, May 2005

Multiple spherically converging shock waves in liquid deuterium journal, September 2011

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

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA journal, May 2005

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

Shock timing technique for the National Ignition Facility journal, May 2001

First-principles equation-of-state table of deuterium for inertial confinement fusion applications journal, December 2011

The instability of liquid surfaces when accelerated in a direction perpendicular to their planes. I journal, March 1950

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets journal, April 2001

Direct-drive laser fusion: Status and prospects journal, May 1998

The Physics of Inertial Fusion book, January 2004

Early stage of implosion in inertial confinement fusion: Shock timing and perturbation evolution journal, January 2006

Performance of direct-drive cryogenic targets on OMEGA journal, May 2008

Initial performance results of the OMEGA laser system journal, January 1997

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

Three-dimensional modeling of direct-drive cryogenic implosions on OMEGA journal, May 2016

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets text, January 2001

Simulated refraction-enhanced X-ray radiography of laser-driven shocks journal, March 2019

Study of high-Z-coated ignition target by detailed configuration accounting atomic physics for direct-drive inertial confinement fusion journal, November 2018

Simulated Refraction-Enhanced X-Ray Radiography of Laser-Driven Shocks text, January 2019

Line-imaging velocimeter for shock diagnostics at the OMEGA laser facility
journal, November 2004

Direct-drive, cryogenic target implosions on OMEGA
journal, May 2005

Multiple spherically converging shock waves in liquid deuterium
journal, September 2011

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

Multidimensional analysis of direct-drive, plastic-shell implosions on OMEGA
journal, May 2005

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

Shock timing technique for the National Ignition Facility
journal, May 2001

First-principles equation-of-state table of deuterium for inertial confinement fusion applications
journal, December 2011

The instability of liquid surfaces when accelerated in a direction perpendicular to their planes. I
journal, March 1950

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets
journal, April 2001

Direct-drive laser fusion: Status and prospects
journal, May 1998

The Physics of Inertial Fusion
book, January 2004

Early stage of implosion in inertial confinement fusion: Shock timing and perturbation evolution
journal, January 2006

Performance of direct-drive cryogenic targets on OMEGA
journal, May 2008

Initial performance results of the OMEGA laser system
journal, January 1997

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

Three-dimensional modeling of direct-drive cryogenic implosions on OMEGA
journal, May 2016

Stagnation Pressure of Imploding Shells and Ignition Energy Scaling of Inertial Confinement Fusion Targets
text, January 2001

Simulated refraction-enhanced X-ray radiography of laser-driven shocks
journal, March 2019

Study of high-Z-coated ignition target by detailed configuration accounting atomic physics for direct-drive inertial confinement fusion
journal, November 2018

Simulated Refraction-Enhanced X-Ray Radiography of Laser-Driven Shocks
text, January 2019