Hohlraum modeling for opacity experiments on the National Ignition Facility

Dodd, Evan S.; DeVolder, Barbara Gloria; Martin, M. E.; Krasheninnikova, Natalia Sergeevna; Tregillis, Ian Lee; Perry, Theodore Sonne; Heeter, R. F.; Opachich, Y. P.; Moore, A. S.; Kline, John L.; Johns, Heather Marie; Liedahl, D. A.; Cardenas, Tana; Olson, Richard Edward; Wilde, Bernhard Heinz; Urbatsch, Todd James

doi:10.1063/1.5026285

Title: Hohlraum modeling for opacity experiments on the National Ignition Facility

Journal Article · Fri Jun 08 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5026285· OSTI ID:1479930

^[1]; DeVolder, Barbara Gloria ^[1]; Martin, M. E. ^[2];

^[1]; Tregillis, Ian Lee ^[1];

^[1];

^[2];

^[3]; Moore, A. S. ^[1];

^[1];

^[1]; Liedahl, D. A. ^[2]; Cardenas, Tana ^[1];

^[1]; Wilde, Bernhard Heinz ^[1];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
National Security Technologies, LLC, Livermore, CA (United States)

This paper discusses the modeling of experiments that measure iron opacity in local thermodynamic equilibrium (LTE) using laser-driven hohlraums at the National Ignition Facility (NIF). A previous set of experiments fielded at Sandia's Z facility [Bailey et al., Nature 517, 56 (2015)] have shown up to factors of two discrepancies between the theory and experiment, casting doubt on the validity of the opacity models. The purpose of the new experiments is to make corroborating measurements at the same densities and temperatures, with the initial measurements made at a temperature of 160 eV and an electron density of 0.7 × 10²² cm^-3. The X-ray hot spots of a laser-driven hohlraum are not in LTE, and the iron must be shielded from a direct line-of-sight to obtain the data [Perry et al., Phys. Rev. B 54, 5617 (1996)]. This shielding is provided either with the internal structure (e.g., baffles) or external wall shapes that divide the hohlraum into a laser-heated portion and an LTE portion. In contrast, most inertial confinement fusion hohlraums are simple cylinders lacking complex gold walls, and the design codes are not typically applied to targets like those for the opacity experiments. We will discuss the initial basis for the modeling using LASNEX, and the subsequent modeling of five different hohlraum geometries that have been fielded on the NIF to date. This includes a comparison of calculated and measured radiation temperatures.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396; AC52-07NA27344; AC52-06NA25946

OSTI ID:: 1479930

Alternate ID(s):: OSTI ID: 1441085; OSTI ID: 1784605

Report Number(s):: LA-UR-17-28949; LLNL-JRNL-822929

Journal Information:: Physics of Plasmas, Vol. 25, Issue 6; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 9 works

Citation information provided by
Web of Science

References (19)

Dante soft x-ray power diagnostic for National Ignition Facility Dewald, E. L.; Campbell, K. M.; Turner, R. E. Review of Scientific Instruments, Vol. 75, Issue 10 https://doi.org/10.1063/1.1788872	journal	October 2004
Solar models with helium and heavy-element diffusion Bahcall, John N.; Pinsonneault, M. H.; Wasserburg, G. J. Reviews of Modern Physics, Vol. 67, Issue 4 https://doi.org/10.1103/RevModPhys.67.781	journal	October 1995
X-ray conversion efficiency in vacuum hohlraum experiments at the National Ignition Facility Olson, R. E.; Suter, L. J.; Kline, J. L. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.4704795	journal	May 2012
Replicating the Z iron opacity experiments on the NIF Perry, T. S.; Heeter, R. F.; Opachich, Y. P. High Energy Density Physics, Vol. 23 https://doi.org/10.1016/j.hedp.2017.05.006	journal	June 2017
Interpenetration and ion separation in colliding plasmas Rambo, P. W.; Denavit, J. Physics of Plasmas, Vol. 1, Issue 12 https://doi.org/10.1063/1.870875	journal	December 1994
Design of the opacity spectrometer for opacity measurements at the National Ignition Facility Ross, P. W.; Heeter, R. F.; Ahmed, M. F. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4962819	journal	October 2016
Absorption experiments on x-ray-heated mid- Z constrained samples Perry, T. S.; Springer, P. T.; Fields, D. F. Physical Review E, Vol. 54, Issue 5 https://doi.org/10.1103/PhysRevE.54.5617	journal	November 1996
Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility Opachich, Y. P.; Heeter, R. F.; Barrios, M. A. Physics of Plasmas, Vol. 24, Issue 6 https://doi.org/10.1063/1.4985076	journal	June 2017
Design and Fabrication of Opacity Targets for the National Ignition Facility Cardenas, T.; Schmidt, D. W.; Dodd, E. S. Fusion Science and Technology, Vol. 73, Issue 3 https://doi.org/10.1080/15361055.2017.1389559	journal	December 2017
Spectroscopic absorption measurements of an iron plasma Springer, P. T.; Fields, D. J.; Wilson, B. G. Physical Review Letters, Vol. 69, Issue 26 https://doi.org/10.1103/PhysRevLett.69.3735	journal	December 1992
The role of a detailed configuration accounting (DCA) atomic physics package in explaining the energy balance in ignition-scale hohlraums Rosen, M. D.; Scott, H. A.; Hinkel, D. E. High Energy Density Physics, Vol. 7, Issue 3 https://doi.org/10.1016/j.hedp.2011.03.008	journal	September 2011
A higher-than-predicted measurement of iron opacity at solar interior temperatures Bailey, J. E.; Nagayama, T.; Loisel, G. P. Nature, Vol. 517, Issue 7532 https://doi.org/10.1038/nature14048	journal	December 2014
Iron-Plasma Transmission Measurements at Temperatures Above 150 eV Bailey, J. E.; Rochau, G. A.; Iglesias, C. A. Physical Review Letters, Vol. 99, Issue 26 https://doi.org/10.1103/PhysRevLett.99.265002	journal	December 2007
Untangling of 2D meshes in ALE simulations Vachal, Pavel; Garimella, Rao V.; Shashkov, Mikhail J. Journal of Computational Physics, Vol. 196, Issue 2 https://doi.org/10.1016/j.jcp.2003.11.011	journal	May 2004
The RAGE radiation-hydrodynamic code Gittings, Michael; Weaver, Robert; Clover, Michael Computational Science & Discovery, Vol. 1, Issue 1 https://doi.org/10.1088/1749-4699/1/1/015005	journal	October 2008
Tamper asymmetry and its effect on transmission for x-ray driven opacity simulations Morris, H. E.; Tregillis, I. L.; Hoffman, N. M. Physics of Plasmas, Vol. 24, Issue 9 https://doi.org/10.1063/1.4994062	journal	September 2017
Advances in NLTE modeling for integrated simulations Scott, H. A.; Hansen, S. B. High Energy Density Physics, Vol. 6, Issue 1 https://doi.org/10.1016/j.hedp.2009.07.003	journal	January 2010
Observation of High Soft X-Ray Drive in Large-Scale Hohlraums at the National Ignition Facility Kline, J. L.; Glenzer, S. H.; Olson, R. E. Physical Review Letters, Vol. 106, Issue 8 https://doi.org/10.1103/PhysRevLett.106.085003	journal	February 2011
Three-dimensional HYDRA simulations of National Ignition Facility targets Marinak, M. M.; Kerbel, G. D.; Gentile, N. A. Physics of Plasmas, Vol. 8, Issue 5 https://doi.org/10.1063/1.1356740	journal	May 2001

Cited By (2)

Radiation flux study of hohlraum used to create uniform and strongly coupled warm dense matter Zhang, Zhiyu; Zhao, Yang; Zhang, Jiyan Physics of Plasmas, Vol. 26, Issue 7 https://doi.org/10.1063/1.5092777	journal	July 2019
Iron X-ray Transmission at Temperature Near 150 eV Using the National Ignition Facility: First Measurements and Paths to Uncertainty Reduction Heeter, Robert; Perry, Ted; Johns, Heather Atoms, Vol. 6, Issue 4 https://doi.org/10.3390/atoms6040057	journal	October 2018

Similar Records

Conceptual design of initial opacity experiments on the national ignition facility

Journal Article · Mon Jan 09 00:00:00 EST 2017 · Journal of Plasma Physics · OSTI ID:1479930

Heeter, R. F.; Bailey, J. E.; Craxton, R. S.; +17 more

Calibrated simulations of

Z

opacity experiments that reproduce the experimentally measured plasma conditions

Journal Article · Fri Feb 05 00:00:00 EST 2016 · Physical Review E · OSTI ID:1479930

Nagayama, T.; Bailey, J. E.; Loisel, G.; +3 more

First systematic study of L-shell opacity at stellar interior temperatures

Journal Article · Fri Jun 14 00:00:00 EDT 2019 · Physical Review Letters · OSTI ID:1479930

Nagayama, Taisuke; Bailey, J. E.; Loisel, G. P.; +19 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Opacity-on-NIF
hohlraum modeling

Title: Hohlraum modeling for opacity experiments on the National Ignition Facility

Citation Formats

References (19)

Cited By (2)

Similar Records

Related Subjects