Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility [Using ViewFactor Experiments to Measure Hohlraum X-Radiation Drive from the Capsule Point-of-View in Ignition Experiments on the National Ignition Facility]
Abstract
Here, indirect drive experiments at the National Ignition Facility are designed to achieve fusion by imploding a fuel capsule with x rays from a laser-driven hohlraum. Previous experiments have been unable to determine whether a deficit in measured ablator implosion velocity relative to simulations is due to inadequate models of the hohlraum or ablator physics. ViewFactor experiments allow for the first time a direct measure of the x-ray drive from the capsule point of view. The experiments show a 15%–25% deficit relative to simulations and thus explain nearly all of the disagreement with the velocity data. In addition, the data from this open geometry provide much greater constraints on a predictive model of laser-driven hohlraum performance than the nominal ignition target.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Atomic Weapons Establishment, Reading (United Kingdom)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1411686
- Report Number(s):
- LLNL-JRNL-644035
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1800273
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 10; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION; inertial confinement fusion; hohlraum
Citation Formats
MacLaren, S. A., Schneider, M. B., Widmann, K., Hammer, J. H., Yoxall, B. E., Moody, J. D., Bell, P. M., Benedetti, L. R., Bradley, D. K., Edwards, M. J., Guymer, T. M., Hinkel, D. E., Hsing, W. W., Kervin, M. L., Meezan, N. B., Moore, A. S., and Ralph, J. E. Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility [Using ViewFactor Experiments to Measure Hohlraum X-Radiation Drive from the Capsule Point-of-View in Ignition Experiments on the National Ignition Facility]. United States: N. p., 2014.
Web. doi:10.1103/PhysRevLett.112.105003.
MacLaren, S. A., Schneider, M. B., Widmann, K., Hammer, J. H., Yoxall, B. E., Moody, J. D., Bell, P. M., Benedetti, L. R., Bradley, D. K., Edwards, M. J., Guymer, T. M., Hinkel, D. E., Hsing, W. W., Kervin, M. L., Meezan, N. B., Moore, A. S., & Ralph, J. E. Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility [Using ViewFactor Experiments to Measure Hohlraum X-Radiation Drive from the Capsule Point-of-View in Ignition Experiments on the National Ignition Facility]. United States. https://doi.org/10.1103/PhysRevLett.112.105003
MacLaren, S. A., Schneider, M. B., Widmann, K., Hammer, J. H., Yoxall, B. E., Moody, J. D., Bell, P. M., Benedetti, L. R., Bradley, D. K., Edwards, M. J., Guymer, T. M., Hinkel, D. E., Hsing, W. W., Kervin, M. L., Meezan, N. B., Moore, A. S., and Ralph, J. E. 2014.
"Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility [Using ViewFactor Experiments to Measure Hohlraum X-Radiation Drive from the Capsule Point-of-View in Ignition Experiments on the National Ignition Facility]". United States. https://doi.org/10.1103/PhysRevLett.112.105003. https://www.osti.gov/servlets/purl/1411686.
@article{osti_1411686,
title = {Novel Characterization of Capsule X-Ray Drive at the National Ignition Facility [Using ViewFactor Experiments to Measure Hohlraum X-Radiation Drive from the Capsule Point-of-View in Ignition Experiments on the National Ignition Facility]},
author = {MacLaren, S. A. and Schneider, M. B. and Widmann, K. and Hammer, J. H. and Yoxall, B. E. and Moody, J. D. and Bell, P. M. and Benedetti, L. R. and Bradley, D. K. and Edwards, M. J. and Guymer, T. M. and Hinkel, D. E. and Hsing, W. W. and Kervin, M. L. and Meezan, N. B. and Moore, A. S. and Ralph, J. E.},
abstractNote = {Here, indirect drive experiments at the National Ignition Facility are designed to achieve fusion by imploding a fuel capsule with x rays from a laser-driven hohlraum. Previous experiments have been unable to determine whether a deficit in measured ablator implosion velocity relative to simulations is due to inadequate models of the hohlraum or ablator physics. ViewFactor experiments allow for the first time a direct measure of the x-ray drive from the capsule point of view. The experiments show a 15%–25% deficit relative to simulations and thus explain nearly all of the disagreement with the velocity data. In addition, the data from this open geometry provide much greater constraints on a predictive model of laser-driven hohlraum performance than the nominal ignition target.},
doi = {10.1103/PhysRevLett.112.105003},
url = {https://www.osti.gov/biblio/1411686},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 10,
volume = 112,
place = {United States},
year = {Thu Mar 13 00:00:00 EDT 2014},
month = {Thu Mar 13 00:00:00 EDT 2014}
}
Web of Science
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