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Title: Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry

Abstract

In this paper, we describe the use of a robust new 1-D like implosion platform at the National Ignition Facility [G. H. Miller et al., Opt. Eng. 43, 2841 (2004)] to study the effect of convergence on mix and shape. Previous experiments suggest that nuclear yields and ion temperature degrade with increased convergence [M. D. Cable et al., Phys. Rev. Lett. 73, 2316 (1994)] due to enhanced perturbation growth and mix, but little has been reported on the distortion of the shape with time. The 2-shock platform was developed [S. F. Khan et al., Phys. Plasmas 23, 042708 (2016)] to maintain a high degree of sphericity during the whole implosion phase and has a thick, uniformly doped (1% Si) plastic CH shell to minimize the effect of mixing due to hydrodynamic feed-through from the outer ablator surface. An inner layer of deuterated plastic (CD) and hydrogen-tritium (DT) gas fill allows for the measurement of DT neutrons produced by the mix between the gas and ablator. DD neutrons provide information about the hot, unmixed CD region. By changing the fill gas density while keeping the capsule diameter, ablator thickness, and Au hohlraum conditions fixed, the x-ray hot spot convergence ratio wasmore » varied from 14 to 22. We find that the atomic mix (DT yield) grows linearly as a function of convergence, but since T ion changes as well, it does not necessarily mean that the amount or extent of mix grows linearly as well. Lastly, we also find the DD yield, which is a measurement of the shell heating, saturates above a certain convergence.« less

Authors:
ORCiD logo [1];  [2];  [2]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [1];  [2];  [2];  [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2]; ORCiD logo [2];  [2];  [2] more »;  [2]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [2];  [2];  [3];  [3] « less
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1479936
Alternate Identifier(s):
OSTI ID: 1476128
Report Number(s):
LA-UR-18-21677
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396; AC52-07NA27344; NA0001808
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 10; 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; Implosion,NIF, copnvergence

Citation Formats

Kyrala, George Amine, Pino, J. E., Khan, S. F., MacLaren, S. A., Salmonson, J. D., Ma, T., Masse, L., Tipton, R., Bradley, Paul Andrew, Rygg, J. R., Field, J. E., Tommasini, R., Ralph, J. E., Turnbull, D. P., Mackinnon, A. J., Benedetti, L. R., Bradley, D. K., Nagel, S., Celliers, P. M., Dewald, E., Dittrich, T. R., Berzak Hopkins, L., Izumi, N., Kervin, M. L., Kline, John L., Yeamans, C., Hatarik, R., Sayre, D., Hartouni, E. P., Pak, A., Chen, K. C., and Hoover, D. E. Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry. United States: N. p., 2018. Web. doi:10.1063/1.5038570.
Kyrala, George Amine, Pino, J. E., Khan, S. F., MacLaren, S. A., Salmonson, J. D., Ma, T., Masse, L., Tipton, R., Bradley, Paul Andrew, Rygg, J. R., Field, J. E., Tommasini, R., Ralph, J. E., Turnbull, D. P., Mackinnon, A. J., Benedetti, L. R., Bradley, D. K., Nagel, S., Celliers, P. M., Dewald, E., Dittrich, T. R., Berzak Hopkins, L., Izumi, N., Kervin, M. L., Kline, John L., Yeamans, C., Hatarik, R., Sayre, D., Hartouni, E. P., Pak, A., Chen, K. C., & Hoover, D. E. Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry. United States. doi:10.1063/1.5038570.
Kyrala, George Amine, Pino, J. E., Khan, S. F., MacLaren, S. A., Salmonson, J. D., Ma, T., Masse, L., Tipton, R., Bradley, Paul Andrew, Rygg, J. R., Field, J. E., Tommasini, R., Ralph, J. E., Turnbull, D. P., Mackinnon, A. J., Benedetti, L. R., Bradley, D. K., Nagel, S., Celliers, P. M., Dewald, E., Dittrich, T. R., Berzak Hopkins, L., Izumi, N., Kervin, M. L., Kline, John L., Yeamans, C., Hatarik, R., Sayre, D., Hartouni, E. P., Pak, A., Chen, K. C., and Hoover, D. E. Thu . "Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry". United States. doi:10.1063/1.5038570. https://www.osti.gov/servlets/purl/1479936.
@article{osti_1479936,
title = {Using a 2-shock 1D platform at NIF to measure the effect of convergence on mix and symmetry},
author = {Kyrala, George Amine and Pino, J. E. and Khan, S. F. and MacLaren, S. A. and Salmonson, J. D. and Ma, T. and Masse, L. and Tipton, R. and Bradley, Paul Andrew and Rygg, J. R. and Field, J. E. and Tommasini, R. and Ralph, J. E. and Turnbull, D. P. and Mackinnon, A. J. and Benedetti, L. R. and Bradley, D. K. and Nagel, S. and Celliers, P. M. and Dewald, E. and Dittrich, T. R. and Berzak Hopkins, L. and Izumi, N. and Kervin, M. L. and Kline, John L. and Yeamans, C. and Hatarik, R. and Sayre, D. and Hartouni, E. P. and Pak, A. and Chen, K. C. and Hoover, D. E.},
abstractNote = {In this paper, we describe the use of a robust new 1-D like implosion platform at the National Ignition Facility [G. H. Miller et al., Opt. Eng. 43, 2841 (2004)] to study the effect of convergence on mix and shape. Previous experiments suggest that nuclear yields and ion temperature degrade with increased convergence [M. D. Cable et al., Phys. Rev. Lett. 73, 2316 (1994)] due to enhanced perturbation growth and mix, but little has been reported on the distortion of the shape with time. The 2-shock platform was developed [S. F. Khan et al., Phys. Plasmas 23, 042708 (2016)] to maintain a high degree of sphericity during the whole implosion phase and has a thick, uniformly doped (1% Si) plastic CH shell to minimize the effect of mixing due to hydrodynamic feed-through from the outer ablator surface. An inner layer of deuterated plastic (CD) and hydrogen-tritium (DT) gas fill allows for the measurement of DT neutrons produced by the mix between the gas and ablator. DD neutrons provide information about the hot, unmixed CD region. By changing the fill gas density while keeping the capsule diameter, ablator thickness, and Au hohlraum conditions fixed, the x-ray hot spot convergence ratio was varied from 14 to 22. We find that the atomic mix (DT yield) grows linearly as a function of convergence, but since Tion changes as well, it does not necessarily mean that the amount or extent of mix grows linearly as well. Lastly, we also find the DD yield, which is a measurement of the shell heating, saturates above a certain convergence.},
doi = {10.1063/1.5038570},
journal = {Physics of Plasmas},
number = 10,
volume = 25,
place = {United States},
year = {2018},
month = {10}
}

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Works referenced in this record:

The National Ignition Facility
journal, December 2004


Indirectly Driven, High Convergence Inertial Confinement Fusion Implosions
journal, October 1994


Symmetry tuning of a near one-dimensional 2-shock platform for code validation at the National Ignition Facility
journal, April 2016

  • Khan, S. F.; MacLaren, S. A.; Salmonson, J. D.
  • Physics of Plasmas, Vol. 23, Issue 4
  • DOI: 10.1063/1.4947223

The effect of mix on capsule yields as a function of shell thickness and gas fill
journal, June 2014


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

  • Haan, S. W.; Lindl, J. D.; Callahan, D. A.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3592169

Moderate-convergence inertial confinement fusion implosions in tetrahedral hohlraums at Omega
journal, June 2000

  • Bennett, G. R.; Wallace, J. M.; Murphy, T. J.
  • Physics of Plasmas, Vol. 7, Issue 6
  • DOI: 10.1063/1.874101

Hohlraum-Driven High-Convergence Implosion Experiments with Multiple Beam Cones on the Omega Laser Facility
journal, September 2002


Degradation of radiatively driven inertial confinement fusion capsule implosions by multifluid interpenetration mixing
journal, November 2003

  • Wilson, D. C.; Scannapieco, A. J.; Cranfill, C. W.
  • Physics of Plasmas, Vol. 10, Issue 11
  • DOI: 10.1063/1.1613653

Onset of Hydrodynamic Mix in High-Velocity, Highly Compressed Inertial Confinement Fusion Implosions
journal, August 2013


Diagnosing and controlling mix in National Ignition Facility implosion experiments
journal, May 2011

  • Hammel, B. A.; Scott, H. A.; Regan, S. P.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3567520

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


Laser fusion experiments, facilities, and diagnostics at Lawrence Livermore National Laboratory
journal, January 1981


Atomic mix in directly driven inertial confinement implosions
journal, November 2011

  • Wilson, D. C.; Ebey, P. S.; Sangster, T. C.
  • Physics of Plasmas, Vol. 18, Issue 11
  • DOI: 10.1063/1.3656962

Nuclear measurements of fuel-shell mix in inertial confinement fusion implosions at OMEGA
journal, May 2007

  • Rygg, J. R.; Frenje, J. A.; Li, C. K.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2671761

Time-Dependent Nuclear Measurements of Mix in Inertial Confinement Fusion
journal, May 2007


Development of the CD Symcap platform to study gas-shell mix in implosions at the National Ignition Facility
journal, September 2014

  • Casey, D. T.; Smalyuk, V. A.; Tipton, R. E.
  • Physics of Plasmas, Vol. 21, Issue 9
  • DOI: 10.1063/1.4894215

Measurements of an Ablator-Gas Atomic Mix in Indirectly Driven Implosions at the National Ignition Facility
journal, January 2014


Detailed high-resolution three-dimensional simulations of OMEGA separated reactants inertial confinement fusion experiments
journal, July 2016

  • Haines, Brian M.; Grim, Gary P.; Fincke, James R.
  • Physics of Plasmas, Vol. 23, Issue 7
  • DOI: 10.1063/1.4959117

The physics basis for ignition using indirect-drive targets on the National Ignition Facility
journal, February 2004

  • Lindl, John D.; Amendt, Peter; Berger, Richard L.
  • Physics of Plasmas, Vol. 11, Issue 2
  • DOI: 10.1063/1.1578638

Neutron spectra from inertial confinement fusion targets for measurement of fuel areal density and charged particle stopping powers
journal, September 1987

  • Cable, M. D.; Hatchett, S. P.
  • Journal of Applied Physics, Vol. 62, Issue 6
  • DOI: 10.1063/1.339850

Experimental determination of fuel density‐radius product of inertial confinement fusion targets using secondary nuclear fusion reactions
journal, September 1986

  • Azechi, H.; Miyanaga, N.; Stapf, R. O.
  • Applied Physics Letters, Vol. 49, Issue 10
  • DOI: 10.1063/1.97093

Radiation hydrodynamics modeling of the highest compression inertial confinement fusion ignition experiment from the National Ignition Campaign
journal, February 2015

  • Clark, D. S.; Marinak, M. M.; Weber, C. R.
  • Physics of Plasmas, Vol. 22, Issue 2
  • DOI: 10.1063/1.4906897

Tuning the Implosion Symmetry of ICF Targets via Controlled Crossed-Beam Energy Transfer
journal, January 2009


First High-Convergence Cryogenic Implosion in a Near-Vacuum Hohlraum
journal, April 2015


Symmetry tuning for ignition capsules via the symcap technique
journal, May 2011

  • Kyrala, G. A.; Kline, J. L.; Dixit, S.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3574504

Tuning indirect-drive implosions using cone power balance
journal, July 2011

  • Kyrala, G. A.; Seifter, A.; Kline, J. L.
  • Physics of Plasmas, Vol. 18, Issue 7
  • DOI: 10.1063/1.3598179

The first measurements of soft x-ray flux from ignition scale Hohlraums at the National Ignition Facility using DANTE (invited)
journal, October 2010

  • Kline, J. L.; Widmann, K.; Warrick, A.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3491032

Measuring symmetry of implosions in cryogenic Hohlraums at the NIF using gated x-ray detectors (invited)
journal, October 2010

  • Kyrala, G. A.; Dixit, S.; Glenzer, S.
  • Review of Scientific Instruments, Vol. 81, Issue 10
  • DOI: 10.1063/1.3481028

Application of imaging plates to x-ray imaging and spectroscopy in laser plasma experiments (invited)
journal, October 2006

  • Izumi, N.; Snavely, R.; Gregori, G.
  • Review of Scientific Instruments, Vol. 77, Issue 10
  • DOI: 10.1063/1.2351924

Capsule implosion optimization during the indirect-drive National Ignition Campaign
journal, May 2011

  • Landen, O. L.; Edwards, J.; Haan, S. W.
  • Physics of Plasmas, Vol. 18, Issue 5
  • DOI: 10.1063/1.3592170

The role of hot spot mix in the low-foot and high-foot implosions on the NIF
journal, May 2017

  • Ma, T.; Patel, P. K.; Izumi, N.
  • Physics of Plasmas, Vol. 24, Issue 5
  • DOI: 10.1063/1.4983625

Imaging of high-energy x-ray emission from cryogenic thermonuclear fuel implosions on the NIF
journal, October 2012

  • Ma, T.; Izumi, N.; Tommasini, R.
  • Review of Scientific Instruments, Vol. 83, Issue 10
  • DOI: 10.1063/1.4733313

Analysis of the neutron time-of-flight spectra from inertial confinement fusion experiments
journal, November 2015

  • Hatarik, R.; Sayre, D. B.; Caggiano, J. A.
  • Journal of Applied Physics, Vol. 118, Issue 18
  • DOI: 10.1063/1.4935455

Relativistic calculation of fusion product spectra for thermonuclear plasmas
journal, November 1998


Impact of temperature-velocity distribution on fusion neutron peak shape
journal, May 2017

  • Munro, D. H.; Field, J. E.; Hatarik, R.
  • Physics of Plasmas, Vol. 24, Issue 5
  • DOI: 10.1063/1.4976857

Thermonuclear reactions probed at stellar-core conditions with laser-based inertial-confinement fusion
journal, August 2017

  • Casey, D. T.; Sayre, D. B.; Brune, C. R.
  • Nature Physics, Vol. 13, Issue 12
  • DOI: 10.1038/nphys4220