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Title: Design and Fabrication of Opacity Targets for the National Ignition Facility

Abstract

Accurate models for opacity of partially ionized atoms are important for modeling and understanding stellar interiors and other high-energy-density phenomena such as inertial confinement fusion. Lawrence Livermore National Laboratory is leading a multilaboratory effort to conduct experiments on the National Ignition Facility (NIF) to try to reproduce recent opacity tests at the Sandia National Laboratory Z-facility. Since 2015, the NIF effort has evolved several hohlraum designs that consist of multiple pieces joined together. The target also has three components attached to the main stalk over a long distance with high tolerances that have resulted in several design iterations. The target has made use of rapid prototyped features to attach a capsule and collimator under the hohlraum while avoiding interference with the beams. Furthermore, this paper discusses the evolution of the hohlraum and overall target design and the challenges involved with fabricating and assembling these targets.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1];  [2];  [3]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1416284
Alternate Identifier(s):
OSTI ID: 1438713
Report Number(s):
LA-UR-17-26125; LLNL-JRNL-740900
Journal ID: ISSN 1536-1055; TRN: US1800896
Grant/Contract Number:  
AC52-06NA25396; AC52‐07NA27344; NA0001808; AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Journal ID: ISSN 1536-1055
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Opacity; 77 NANOSCIENCE AND NANOTECHNOLOGY; 47 OTHER INSTRUMENTATION; 70 PLASMA PHYSICS AND FUSION; opacity; solar interior; target fabrication

Citation Formats

Cardenas, Tana, Schmidt, Derek William, Dodd, Evan S., Perry, Theodore Sonne, Capelli, Deanna, Quintana, Theresa E., Oertel, John A., Peterson, Dominic S., Giraldez, Emilio, and Heeter, Robert F. Design and Fabrication of Opacity Targets for the National Ignition Facility. United States: N. p., 2017. Web. doi:10.1080/15361055.2017.1389559.
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Cardenas, Tana, Schmidt, Derek William, Dodd, Evan S., Perry, Theodore Sonne, Capelli, Deanna, Quintana, Theresa E., Oertel, John A., Peterson, Dominic S., Giraldez, Emilio, & Heeter, Robert F. Design and Fabrication of Opacity Targets for the National Ignition Facility. United States. https://doi.org/10.1080/15361055.2017.1389559
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Cardenas, Tana, Schmidt, Derek William, Dodd, Evan S., Perry, Theodore Sonne, Capelli, Deanna, Quintana, Theresa E., Oertel, John A., Peterson, Dominic S., Giraldez, Emilio, and Heeter, Robert F. Fri . "Design and Fabrication of Opacity Targets for the National Ignition Facility". United States. https://doi.org/10.1080/15361055.2017.1389559. https://www.osti.gov/servlets/purl/1416284.
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@article{osti_1416284,
title = {Design and Fabrication of Opacity Targets for the National Ignition Facility},
author = {Cardenas, Tana and Schmidt, Derek William and Dodd, Evan S. and Perry, Theodore Sonne and Capelli, Deanna and Quintana, Theresa E. and Oertel, John A. and Peterson, Dominic S. and Giraldez, Emilio and Heeter, Robert F.},
abstractNote = {Accurate models for opacity of partially ionized atoms are important for modeling and understanding stellar interiors and other high-energy-density phenomena such as inertial confinement fusion. Lawrence Livermore National Laboratory is leading a multilaboratory effort to conduct experiments on the National Ignition Facility (NIF) to try to reproduce recent opacity tests at the Sandia National Laboratory Z-facility. Since 2015, the NIF effort has evolved several hohlraum designs that consist of multiple pieces joined together. The target also has three components attached to the main stalk over a long distance with high tolerances that have resulted in several design iterations. The target has made use of rapid prototyped features to attach a capsule and collimator under the hohlraum while avoiding interference with the beams. Furthermore, this paper discusses the evolution of the hohlraum and overall target design and the challenges involved with fabricating and assembling these targets.},
doi = {10.1080/15361055.2017.1389559},
journal = {Fusion Science and Technology},
number = 3,
volume = 73,
place = {United States},
year = {Fri Dec 22 00:00:00 EST 2017},
month = {Fri Dec 22 00:00:00 EST 2017}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1080/15361055.2017.1389559
Copyright Statement
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Citation Metrics:
Cited by: 4 works
Citation information provided by
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Figures / Tables:

Figure 1 Figure 1: Conceptual design of Opacity target, foil is located at equator of the Hohlraum [2]
All figures and tables (17 total)
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Works referenced in this record:

Replicating the Z iron opacity experiments on the NIF
journal, June 2017

Capsule implosions for continuum x-ray backlighting of opacity samples at the National Ignition Facility
journal, June 2017

  • Opachich, Y. P.; Heeter, R. F.; Barrios, M. A.
  • Physics of Plasmas, Vol. 24, Issue 6
  • DOI: 10.1063/1.4985076

Development of the Triple Theta Assembly Station with Machine Vision Feedback
journal, April 2009

Additive Manufacturing Capabilities Applied to Inertial Confinement Fusion at Los Alamos National Laboratory
journal, September 2016

  • Cardenas, Tana; Schmidt, Derek W.; Peterson, Dominic S.
  • Fusion Science and Technology, Vol. 70, Issue 2
  • DOI: 10.13182/FST15-249

A higher-than-predicted measurement of iron opacity at solar interior temperatures
journal, December 2014

  • Bailey, J. E.; Nagayama, T.; Loisel, G. P.
  • Nature, Vol. 517, Issue 7532
  • DOI: 10.1038/nature14048
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    Works referencing / citing this record:

    Hohlraum modeling for opacity experiments on the National Ignition Facility
    journal, June 2018

    • Dodd, E. S.; DeVolder, B. G.; Martin, M. E.
    • Physics of Plasmas, Vol. 25, Issue 6
    • DOI: 10.1063/1.5026285
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      Figures / Tables found in this record:

      Figure 1 (p. 17)figure
      Figure 2 (p. 17)figure
      Figure 3 (p. 18)figure
      Figure 4 (p. 18)figure
      Figure 5 (p. 19)figure
      Figure 6 (p. 20)figure
      Figure 7 (p. 20)figure
      Figure 8 (p. 21)figure
      Figure 10 (p. 22)figure
      Figure 11 (p. 22)figure
      Figure 9 (p. 22)figure
      Figure 12 (p. 23)figure
      Figure 13 (p. 23)figure
      Figure 14 (p. 23)figure
      Figure 15 (p. 24)figure
      Figure 16 (p. 24)figure
      Figure 17 (p. 25)figure
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