Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive
Abstract
Experimental results from indirectly driven ignition implosions during the National Ignition Campaign (NIC) [M. J. Edwards et al., Phys. Plasmas 20, 070501 (2013)] achieved a record compression of the central deuterium-tritium fuel layer with measured areal densities up to 1.2 g/cm2, but with significantly lower total neutron yields (between 1.5 × 1014 and 5.5 × 1014) than predicted, approximately 10% of the 2D simulated yield. An order of magnitude improvement in the neutron yield was subsequently obtained in the “high-foot” experiments [O. A. Hurricane et al., Nature 506, 343 (2014)]. However, this yield was obtained at the expense of fuel compression due to deliberately higher fuel adiabat. In this paper, the design of an adiabat-shaped implosion is presented, in which the laser pulse is tailored to achieve similar resistance to ablation-front instability growth, but with a low fuel adiabat to achieve high compression. Additionally, comparison with measured performance shows a factor of 3–10× improvement in the neutron yield (>40% of predicted simulated yield) over similar NIC implosions, while maintaining a reasonable fuel compression of >1 g/cm2. Extension of these designs to higher laser power and energy is discussed to further explore the trade-off between increased implosion velocity and the deleteriousmore »
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1763938
- Alternate Identifier(s):
- OSTI ID: 1228789
- Report Number(s):
- LLNL-JRNL-675896
Journal ID: ISSN 1070-664X; 797329; TRN: US2206110
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 22; Journal Issue: 12; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Doping; deuterium; natural disasters; lasers; fluid instabilities; plasma confinement; fusion energy; interferometry; nuclear fuel; equations of state
Citation Formats
Milovich, J. L., Robey, H. F., Clark, D. S., Baker, K. L., Casey, D. T., Cerjan, C., Field, J., MacPhee, A. G., Pak, A., Patel, P. K., Peterson, J. L., Smalyuk, V. A., and Weber, C. R. Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive. United States: N. p., 2015.
Web. doi:10.1063/1.4935922.
Milovich, J. L., Robey, H. F., Clark, D. S., Baker, K. L., Casey, D. T., Cerjan, C., Field, J., MacPhee, A. G., Pak, A., Patel, P. K., Peterson, J. L., Smalyuk, V. A., & Weber, C. R. Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive. United States. https://doi.org/10.1063/1.4935922
Milovich, J. L., Robey, H. F., Clark, D. S., Baker, K. L., Casey, D. T., Cerjan, C., Field, J., MacPhee, A. G., Pak, A., Patel, P. K., Peterson, J. L., Smalyuk, V. A., and Weber, C. R. Thu .
"Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive". United States. https://doi.org/10.1063/1.4935922. https://www.osti.gov/servlets/purl/1763938.
@article{osti_1763938,
title = {Design of indirectly driven, high-compression Inertial Confinement Fusion implosions with improved hydrodynamic stability using a 4-shock adiabat-shaped drive},
author = {Milovich, J. L. and Robey, H. F. and Clark, D. S. and Baker, K. L. and Casey, D. T. and Cerjan, C. and Field, J. and MacPhee, A. G. and Pak, A. and Patel, P. K. and Peterson, J. L. and Smalyuk, V. A. and Weber, C. R.},
abstractNote = {Experimental results from indirectly driven ignition implosions during the National Ignition Campaign (NIC) [M. J. Edwards et al., Phys. Plasmas 20, 070501 (2013)] achieved a record compression of the central deuterium-tritium fuel layer with measured areal densities up to 1.2 g/cm2, but with significantly lower total neutron yields (between 1.5 × 1014 and 5.5 × 1014) than predicted, approximately 10% of the 2D simulated yield. An order of magnitude improvement in the neutron yield was subsequently obtained in the “high-foot” experiments [O. A. Hurricane et al., Nature 506, 343 (2014)]. However, this yield was obtained at the expense of fuel compression due to deliberately higher fuel adiabat. In this paper, the design of an adiabat-shaped implosion is presented, in which the laser pulse is tailored to achieve similar resistance to ablation-front instability growth, but with a low fuel adiabat to achieve high compression. Additionally, comparison with measured performance shows a factor of 3–10× improvement in the neutron yield (>40% of predicted simulated yield) over similar NIC implosions, while maintaining a reasonable fuel compression of >1 g/cm2. Extension of these designs to higher laser power and energy is discussed to further explore the trade-off between increased implosion velocity and the deleterious effects of hydrodynamic instabilities.},
doi = {10.1063/1.4935922},
journal = {Physics of Plasmas},
number = 12,
volume = 22,
place = {United States},
year = {Thu Dec 10 00:00:00 EST 2015},
month = {Thu Dec 10 00:00:00 EST 2015}
}
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Works referencing / citing this record:
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