Spallation as a dominant source of pusher-fuel and hot-spot mix in inertial confinement fusion capsules
Abstract
We suggest that a potentially dominant but previously neglected source of pusher-fuel and hot-spot “mix” may have been the main degradation mechanism for fusion energy yields of modern inertial confinement fusion (ICF) capsules designed and fielded to achieve high yields — not hydrodynamic instabilities. This potentially dominant mix source is the spallation of small chunks or “grains” of pusher material into the fuel regions whenever (1) the solid material adjacent to the fuel changes its phase by nucleation, and (2) this solid material spalls under shock loading and sudden decompression. Finally, we describe this mix mechanism, support it with simulations and experimental evidence, and explain how to eliminate it and thereby allow higher yields for ICF capsules and possibly ignition at the National Ignition Facility.
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1241970
- Alternate Identifier(s):
- OSTI ID: 1421121
- Report Number(s):
- LLNL-JRNL-668926
Journal ID: ISSN 1070-664X; PHPAEN; TRN: US1600670
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION; 42 ENGINEERING
Citation Formats
Orth, Charles D. Spallation as a dominant source of pusher-fuel and hot-spot mix in inertial confinement fusion capsules. United States: N. p., 2016.
Web. doi:10.1063/1.4942481.
Orth, Charles D. Spallation as a dominant source of pusher-fuel and hot-spot mix in inertial confinement fusion capsules. United States. https://doi.org/10.1063/1.4942481
Orth, Charles D. Tue .
"Spallation as a dominant source of pusher-fuel and hot-spot mix in inertial confinement fusion capsules". United States. https://doi.org/10.1063/1.4942481. https://www.osti.gov/servlets/purl/1241970.
@article{osti_1241970,
title = {Spallation as a dominant source of pusher-fuel and hot-spot mix in inertial confinement fusion capsules},
author = {Orth, Charles D.},
abstractNote = {We suggest that a potentially dominant but previously neglected source of pusher-fuel and hot-spot “mix” may have been the main degradation mechanism for fusion energy yields of modern inertial confinement fusion (ICF) capsules designed and fielded to achieve high yields — not hydrodynamic instabilities. This potentially dominant mix source is the spallation of small chunks or “grains” of pusher material into the fuel regions whenever (1) the solid material adjacent to the fuel changes its phase by nucleation, and (2) this solid material spalls under shock loading and sudden decompression. Finally, we describe this mix mechanism, support it with simulations and experimental evidence, and explain how to eliminate it and thereby allow higher yields for ICF capsules and possibly ignition at the National Ignition Facility.},
doi = {10.1063/1.4942481},
journal = {Physics of Plasmas},
number = 2,
volume = 23,
place = {United States},
year = {Tue Feb 23 00:00:00 EST 2016},
month = {Tue Feb 23 00:00:00 EST 2016}
}
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Works referencing / citing this record:
Effects of preheat and mix on the fuel adiabat of an imploding capsule
journal, December 2016
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- Physics of Plasmas, Vol. 23, Issue 12
High-pressure chemistry of hydrocarbons relevant to planetary interiors and inertial confinement fusion
journal, May 2018
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Kinetic physics in ICF: present understanding and future directions
journal, April 2018
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