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Title: Wetted foam liquid fuel ICF target experiments

Abstract

We are developing a new NIF experimental platform that employs wetted foam liquid fuel layer ICF capsules. We will use the liquid fuel layer capsules in a NIF sub-scale experimental campaign to explore the relationship between hot spot convergence ratio (CR) and the predictability of hot spot formation. DT liquid layer ICF capsules allow for flexibility in hot spot CR via the adjustment of the initial cryogenic capsule temperature and, hence, DT vapor density. Our hypothesis is that the predictive capability of hot spot formation is robust and 1D-like for a relatively low CR hot spot (CR~15), but will become less reliable as hot spot CR is increased to CR>20. Simulations indicate that backing off on hot spot CR is an excellent way to reduce capsule instability growth and to improve robustness to low-mode x-ray flux asymmetries. In the initial experiments, we will test our hypothesis by measuring hot spot size, neutron yield, ion temperature, and burn width to infer hot spot pressure and compare to predictions for implosions with hot spot CR's in the range of 12 to 25. Larger scale experiments are also being designed, and we will advance from sub-scale to full-scale NIF experiments to determine ifmore » 1D-like behavior at low CR is retained as the scale-size is increased. The long-term objective is to develop a liquid fuel layer ICF capsule platform with robust thermonuclear burn, modest CR, and significant α-heating with burn propagation.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1258472
Report Number(s):
LA-UR-16-20284
Journal ID: ISSN 1742-6588
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 717; Conference: Inertial Fusion Sciences and Applications, Seattle, WA (United States), 20-25 Sep 2015; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Olson, R. E., Leeper, R. J., Yi, S. A., Kline, J. L., Zylstra, A. B., Peterson, R. R., Shah, R., Braun, T., Biener, J., Kozioziemski, B. J., Sater, J. D., Biener, M. M., Hamza, A. V., Nikroo, A., Hopkins, L. Berzak, Ho, D., LePape, S., and Meezan, N. B. Wetted foam liquid fuel ICF target experiments. United States: N. p., 2016. Web. doi:10.1088/1742-6596/717/1/012042.
Olson, R. E., Leeper, R. J., Yi, S. A., Kline, J. L., Zylstra, A. B., Peterson, R. R., Shah, R., Braun, T., Biener, J., Kozioziemski, B. J., Sater, J. D., Biener, M. M., Hamza, A. V., Nikroo, A., Hopkins, L. Berzak, Ho, D., LePape, S., & Meezan, N. B. Wetted foam liquid fuel ICF target experiments. United States. https://doi.org/10.1088/1742-6596/717/1/012042
Olson, R. E., Leeper, R. J., Yi, S. A., Kline, J. L., Zylstra, A. B., Peterson, R. R., Shah, R., Braun, T., Biener, J., Kozioziemski, B. J., Sater, J. D., Biener, M. M., Hamza, A. V., Nikroo, A., Hopkins, L. Berzak, Ho, D., LePape, S., and Meezan, N. B. Thu . "Wetted foam liquid fuel ICF target experiments". United States. https://doi.org/10.1088/1742-6596/717/1/012042. https://www.osti.gov/servlets/purl/1258472.
@article{osti_1258472,
title = {Wetted foam liquid fuel ICF target experiments},
author = {Olson, R. E. and Leeper, R. J. and Yi, S. A. and Kline, J. L. and Zylstra, A. B. and Peterson, R. R. and Shah, R. and Braun, T. and Biener, J. and Kozioziemski, B. J. and Sater, J. D. and Biener, M. M. and Hamza, A. V. and Nikroo, A. and Hopkins, L. Berzak and Ho, D. and LePape, S. and Meezan, N. B.},
abstractNote = {We are developing a new NIF experimental platform that employs wetted foam liquid fuel layer ICF capsules. We will use the liquid fuel layer capsules in a NIF sub-scale experimental campaign to explore the relationship between hot spot convergence ratio (CR) and the predictability of hot spot formation. DT liquid layer ICF capsules allow for flexibility in hot spot CR via the adjustment of the initial cryogenic capsule temperature and, hence, DT vapor density. Our hypothesis is that the predictive capability of hot spot formation is robust and 1D-like for a relatively low CR hot spot (CR~15), but will become less reliable as hot spot CR is increased to CR>20. Simulations indicate that backing off on hot spot CR is an excellent way to reduce capsule instability growth and to improve robustness to low-mode x-ray flux asymmetries. In the initial experiments, we will test our hypothesis by measuring hot spot size, neutron yield, ion temperature, and burn width to infer hot spot pressure and compare to predictions for implosions with hot spot CR's in the range of 12 to 25. Larger scale experiments are also being designed, and we will advance from sub-scale to full-scale NIF experiments to determine if 1D-like behavior at low CR is retained as the scale-size is increased. The long-term objective is to develop a liquid fuel layer ICF capsule platform with robust thermonuclear burn, modest CR, and significant α-heating with burn propagation.},
doi = {10.1088/1742-6596/717/1/012042},
url = {https://www.osti.gov/biblio/1258472}, journal = {Journal of Physics. Conference Series},
issn = {1742-6588},
number = ,
volume = 717,
place = {United States},
year = {2016},
month = {5}
}

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Works referenced in this record:

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


A new approach to foam-lined indirect-drive NIF ignition targets
journal, April 2012


In Situ Real-Time Radiographic Study of Thin Film Formation Inside Rotating Hollow Spheres
journal, January 2016


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


Integrated diagnostic analysis of inertial confinement fusion capsule performance
journal, May 2013


Near-vacuum hohlraums for driving fusion implosions with high density carbon ablatorsa)
journal, May 2015


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    Variable convergence liquid layer implosions on the National Ignition Facility
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    Absolute Hugoniot measurements for CH foams in the 2–9 Mbar range
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    Indirect drive ignition at the National Ignition Facility
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