Dense hydrogen layers for high performance MagLIF
Abstract
Magnetized Liner Inertial Fusion (MagLIF) [Slutz et al., Phys. Plasmas 17, 056303 (2010)] experiments driven by the Z machine produce >1013 deuterium-deuterium fusion reactions [Gomez et al., Phys. Rev. Lett. 125, 155002 (2020)]. Simulations indicate high yields and gains (1000) with increased current and deuterium-tritium layers for burn propagation [Slutz et al., Phys. Plasmas 23, 022702 (2016)]. Such a coating also isolates the metal liner from the gaseous fuel, which should reduce mixing of liner material into the fuel. However, the vapor density at the triple point is only 0.3 kg/m3, which is not high enough for MagLIF operation. We present two solutions to this problem. First, a fuel wetted low-density plastic foam can be used to form a layer on the inside of the liner. The desired vapor density can be obtained by controlling the temperature. This does however introduce carbon into the layer which will enhance radiation losses. Simulations indicate that this wetted foam layer can significantly contribute to the fusion yield when the foam density is less than 35 kg/m3. Second, we show that a pure frozen fuel layer can first be formed on the inside of the liner and then low temperature gaseous fuel can be introduced justmore »
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1855793
- Alternate Identifier(s):
- OSTI ID: 1845573
- Report Number(s):
- SAND2022-1929J
Journal ID: ISSN 1070-664X; 703566; TRN: US2305054
- Grant/Contract Number:
- NA0003525; NA-0033525; 213091
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 29; 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 TECHNOLOGY; circuit theorems; shock waves; tritium; radiation losses; deuterium; computer programming; thermal conductivity; nuclear fusion; laser applications
Citation Formats
Slutz, S. A., Awe, T. J., and Crabtree, J. A. Dense hydrogen layers for high performance MagLIF. United States: N. p., 2022.
Web. doi:10.1063/5.0081177.
Slutz, S. A., Awe, T. J., & Crabtree, J. A. Dense hydrogen layers for high performance MagLIF. United States. https://doi.org/10.1063/5.0081177
Slutz, S. A., Awe, T. J., and Crabtree, J. A. Thu .
"Dense hydrogen layers for high performance MagLIF". United States. https://doi.org/10.1063/5.0081177. https://www.osti.gov/servlets/purl/1855793.
@article{osti_1855793,
title = {Dense hydrogen layers for high performance MagLIF},
author = {Slutz, S. A. and Awe, T. J. and Crabtree, J. A.},
abstractNote = {Magnetized Liner Inertial Fusion (MagLIF) [Slutz et al., Phys. Plasmas 17, 056303 (2010)] experiments driven by the Z machine produce >1013 deuterium-deuterium fusion reactions [Gomez et al., Phys. Rev. Lett. 125, 155002 (2020)]. Simulations indicate high yields and gains (1000) with increased current and deuterium-tritium layers for burn propagation [Slutz et al., Phys. Plasmas 23, 022702 (2016)]. Such a coating also isolates the metal liner from the gaseous fuel, which should reduce mixing of liner material into the fuel. However, the vapor density at the triple point is only 0.3 kg/m3, which is not high enough for MagLIF operation. We present two solutions to this problem. First, a fuel wetted low-density plastic foam can be used to form a layer on the inside of the liner. The desired vapor density can be obtained by controlling the temperature. This does however introduce carbon into the layer which will enhance radiation losses. Simulations indicate that this wetted foam layer can significantly contribute to the fusion yield when the foam density is less than 35 kg/m3. Second, we show that a pure frozen fuel layer can first be formed on the inside of the liner and then low temperature gaseous fuel can be introduced just before the implosion without melting a significant amount of the ice layer. This approach is the most promising for MagLIF to produce high yield and gain.},
doi = {10.1063/5.0081177},
journal = {Physics of Plasmas},
number = 2,
volume = 29,
place = {United States},
year = {Thu Feb 17 00:00:00 EST 2022},
month = {Thu Feb 17 00:00:00 EST 2022}
}
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