Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *

MacGowan, B. J.; Landen, O. L.; Casey, D. T.; Young, C. V.; Callahan, D. A.; Hartouni, E. P.; Hatarik, R.; Hohenberger, M.; Ma, T.; Mariscal, D.; Moore, A.; Nora, R.; Rinderknecht, H. G.; Schlossberg, D.; Van Wonterghem, B. M.

doi:10.1016/j.hedp.2021.100944

Title: Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *

Abstract

The mode-1 x-ray drive asymmetry of indirect-drive Inertial Confinement Fusion(ICF) implosions at the National Ignition Facility(NIF) has been estimated using a simple static ViewFactor model. The model takes as input measured laser performance data in the foot and peak, the hohlraum configuration, and laser to hohlraum pointing. These estimates are compared with neutron time-of-flight measurements of directionality and magnitude of the resultant hotspot bulk velocity (~20–100 μm/ns) for 39 NIF shots using High Density Carbon (HDC) ablators and show strong correlation on a statistically significant number of shots. The most important factors identified so far are random quad-to-quad peak power laser imbalances, the presence of lossy diagnostic windows and gaps on the hohlraum waist, capsule sag and capsule thickness mode 1. Typical mode-1 asymmetry in drive is currently ~0.5% for many of these sources on their own and, when summed, can lead to a neutron hotspot velocity of up to 100 μm /ns and a reduction in yield of 35% for current NIF DT layered implosions. Our goal is to identify, quantify and mitigate all potential sources of mode-1 asymmetry (which also include target and laser alignment imperfections, foot power and Cross Beam Energy Transfer imbalances) to enable higher qualitymore » implosions on NIF.« less

Authors:: MacGowan, B. J.; Landen, O. L.; Casey, D. T.; Young, C. V.; Callahan, D. A.; Hartouni, E. P.; Hatarik, R.; Hohenberger, M.; Ma, T.; Mariscal, D.; Moore, A.; Nora, R.; Rinderknecht, H. G.; Schlossberg, D.; Van Wonterghem, B. M.

Publication Date:: Sun Aug 01 00:00:00 EDT 2021

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1798222

Alternate Identifier(s):: OSTI ID: 1843136

Report Number(s):: LLNL-JRNL-804082
Journal ID: ISSN 1574-1818; S1574181821000197; 100944; PII: S1574181821000197

Grant/Contract Number:: AC52-07NA27344

Resource Type:: Published Article

Journal Name:: High Energy Density Physics

Additional Journal Information:: Journal Name: High Energy Density Physics Journal Volume: 40 Journal Issue: C; Journal ID: ISSN 1574-1818

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    MacGowan, B. J., Landen, O. L., Casey, D. T., Young, C. V., Callahan, D. A., Hartouni, E. P., Hatarik, R., Hohenberger, M., Ma, T., Mariscal, D., Moore, A., Nora, R., Rinderknecht, H. G., Schlossberg, D., and Van Wonterghem, B. M. Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *.  Netherlands: N. p., 2021. 
Web.  doi:10.1016/j.hedp.2021.100944.

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                    MacGowan, B. J., Landen, O. L., Casey, D. T., Young, C. V., Callahan, D. A., Hartouni, E. P., Hatarik, R., Hohenberger, M., Ma, T., Mariscal, D., Moore, A., Nora, R., Rinderknecht, H. G., Schlossberg, D., & Van Wonterghem, B. M. Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *.  Netherlands.  https://doi.org/10.1016/j.hedp.2021.100944

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                    MacGowan, B. J., Landen, O. L., Casey, D. T., Young, C. V., Callahan, D. A., Hartouni, E. P., Hatarik, R., Hohenberger, M., Ma, T., Mariscal, D., Moore, A., Nora, R., Rinderknecht, H. G., Schlossberg, D., and Van Wonterghem, B. M. Sun .  
"Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *".  Netherlands.  https://doi.org/10.1016/j.hedp.2021.100944.

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@article{osti_1798222,

  title        = {Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *},

  author       = {MacGowan, B. J. and Landen, O. L. and Casey, D. T. and Young, C. V. and Callahan, D. A. and Hartouni, E. P. and Hatarik, R. and Hohenberger, M. and Ma, T. and Mariscal, D. and Moore, A. and Nora, R. and Rinderknecht, H. G. and Schlossberg, D. and Van Wonterghem, B. M.},

  abstractNote = {The mode-1 x-ray drive asymmetry of indirect-drive Inertial Confinement Fusion(ICF) implosions at the National Ignition Facility(NIF) has been estimated using a simple static ViewFactor model. The model takes as input measured laser performance data in the foot and peak, the hohlraum configuration, and laser to hohlraum pointing. These estimates are compared with neutron time-of-flight measurements of directionality and magnitude of the resultant hotspot bulk velocity (~20–100 μm/ns) for 39 NIF shots using High Density Carbon (HDC) ablators and show strong correlation on a statistically significant number of shots. The most important factors identified so far are random quad-to-quad peak power laser imbalances, the presence of lossy diagnostic windows and gaps on the hohlraum waist, capsule sag and capsule thickness mode 1. Typical mode-1 asymmetry in drive is currently ~0.5% for many of these sources on their own and, when summed, can lead to a neutron hotspot velocity of up to 100 μm /ns and a reduction in yield of 35% for current NIF DT layered implosions. Our goal is to identify, quantify and mitigate all potential sources of mode-1 asymmetry (which also include target and laser alignment imperfections, foot power and Cross Beam Energy Transfer imbalances) to enable higher quality implosions on NIF.},

  doi          = {10.1016/j.hedp.2021.100944},

  journal      = {High Energy Density Physics},

  number       = C,

  volume       = 40,

  place        = {Netherlands},

  year         = {Sun Aug 01 00:00:00 EDT 2021},

  month        = {Sun Aug 01 00:00:00 EDT 2021}

}

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Works referenced in this record:

Exploring the limits of case-to-capsule ratio, pulse length, and picket energy for symmetric hohlraum drive on the National Ignition Facility Laser
journal, May 2018

Callahan, D. A.; Hurricane, O. A.; Ralph, J. E.
Physics of Plasmas, Vol. 25, Issue 5
DOI: 10.1063/1.5020057

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

Using multiple neutron time of flight detectors to determine the hot spot velocity
journal, October 2018

Hatarik, R.; Nora, R. C.; Spears, B. K.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5039372

The Spatially Distributed Neutron Activation Diagnostic FNADs at the National Ignition Facility
journal, May 2017

Yeamans, C. B.; Bleuel, D. L.
Fusion Science and Technology, Vol. 72, Issue 2
DOI: 10.1080/15361055.2017.1320499

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

Yield and compression trends and reproducibility at NIF*
journal, August 2020

Landen, O. L.; Casey, D. T.; DiNicola, J. M.
High Energy Density Physics, Vol. 36
DOI: 10.1016/j.hedp.2020.100755

Interpreting inertial fusion neutron spectra
journal, February 2016

Munro, David H.
Nuclear Fusion, Vol. 56, Issue 3
DOI: 10.1088/0029-5515/56/3/036001

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

Mode 1 drive asymmetry in inertial confinement fusion implosions on the National Ignition Facility
journal, April 2014

Spears, Brian K.; Edwards, M. J.; Hatchett, S.
Physics of Plasmas, Vol. 21, Issue 4
DOI: 10.1063/1.4870390

National Ignition Facility Laser System Performance
journal, February 2016

Spaeth, Mary L.; Manes, Kenneth R.; Bowers, M.
Fusion Science and Technology, Vol. 69, Issue 1
DOI: 10.13182/FST15-136

Description of the NIF Laser
journal, February 2016

Spaeth, M. L.; Manes, K. R.; Kalantar, D. H.
Fusion Science and Technology, Vol. 69, Issue 1
DOI: 10.13182/FST15-144

Fusion Energy Output Greater than the Kinetic Energy of an Imploding Shell at the National Ignition Facility
journal, June 2018

Le Pape, S.; Berzak Hopkins, L. F.; Divol, L.
Physical Review Letters, Vol. 120, Issue 24
DOI: 10.1103/PhysRevLett.120.245003

A simple time-dependent analytic model of the P2 asymmetry in cylindrical hohlraums
journal, May 1999

Landen, O. L.; Amendt, P. A.; Suter, L. J.
Physics of Plasmas, Vol. 6, Issue 5
DOI: 10.1063/1.873465

VISRAD—A 3-D view factor code and design tool for high-energy density physics experiments
journal, September 2003

MacFarlane, J. J.
Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 81, Issue 1-4
DOI: 10.1016/S0022-4073(03)00081-5

Velocity correction for neutron activation diagnostics at the NIF
journal, October 2018

Rinderknecht, Hans G.; Bionta, R.; Grim, G.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5038734

Modeling and Interpretation of Nova's Symmetry Scaling Data Base
journal, October 1994

Suter, L. J.; Hauer, A. A.; Powers, L. V.
Physical Review Letters, Vol. 73, Issue 17
DOI: 10.1103/PhysRevLett.73.2328

Radiation transport between two concentric spheres
journal, December 2000

Pollaine, S. M.
Nuclear Fusion, Vol. 40, Issue 12
DOI: 10.1088/0029-5515/40/12/309

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Title: Trending low mode asymmetries in NIF capsule drive using a simple viewfactor metric *

Abstract

Citation Formats

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