Performance of direct-drive cryogenic targets on OMEGA
Abstract
The success of direct-drive-ignition target designs depends on two issues: the ability to maintain the main fuel adiabat at a low level and the control of the nonuniformity growth during the implosion. A series of experiments was performed on the OMEGA Laser System [T. R. Boehly, D. L. Brown, R. S. Craxton et al., Opt. Commun. 133, 495 (1997)] to study the physics of low-adiabat, high-compression cryogenic fuel assembly. Modeling these experiments requires an accurate account for all sources of shell heating, including shock heating and suprathermal electron preheat. To increase calculation accuracy, a nonlocal heat-transport model was implemented in the 1D hydrocode. High-areal-density cryogenic fuel assembly with {rho}R>200 mg/cm{sup 2} [T. C. Sangster, V. N. Goncharov, P. B. Radha et al., 'High-areal-density fuel assembly in direct-drive cryogenic implosions', Phys. Rev. Lett. (submitted)] has been achieved on OMEGA in designs where the shock timing was optimized using the nonlocal treatment of the heat conduction and the suprathermal-electron preheat generated by the two-plasmon-decay instability was mitigated.
- Authors:
-
- Laboratory for Laser Energetics and Department of Mechanical Engineering, University of Rochester, Rochester, New York 14623 (United States)
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
- Publication Date:
- OSTI Identifier:
- 21120387
- Resource Type:
- Journal Article
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 5; Other Information: DOI: 10.1063/1.2856551; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCURACY; COMPRESSION; CONTROL; DECAY INSTABILITY; DENSITY; DESIGN; ELECTRONS; FUEL ASSEMBLIES; IMPLOSIONS; LASERS; PERFORMANCE; SHOCK HEATING; THERMAL CONDUCTION; THERMONUCLEAR REACTORS
Citation Formats
Goncharov, V N, Sangster, T C, Radha, P B, Boehly, T R, Collins, T J. B., Craxton, R S, Delettrez, J A, Epstein, R, Glebov, V Yu, Hu, S X, Igumenshchev, I V, Knauer, J P, Loucks, S J, Marozas, J A, Marshall, F J, McKenty, P W, Regan, S P, Seka, W, Skupsky, S, and Smalyuk, V A. Performance of direct-drive cryogenic targets on OMEGA. United States: N. p., 2008.
Web. doi:10.1063/1.2856551.
Goncharov, V N, Sangster, T C, Radha, P B, Boehly, T R, Collins, T J. B., Craxton, R S, Delettrez, J A, Epstein, R, Glebov, V Yu, Hu, S X, Igumenshchev, I V, Knauer, J P, Loucks, S J, Marozas, J A, Marshall, F J, McKenty, P W, Regan, S P, Seka, W, Skupsky, S, & Smalyuk, V A. Performance of direct-drive cryogenic targets on OMEGA. United States. https://doi.org/10.1063/1.2856551
Goncharov, V N, Sangster, T C, Radha, P B, Boehly, T R, Collins, T J. B., Craxton, R S, Delettrez, J A, Epstein, R, Glebov, V Yu, Hu, S X, Igumenshchev, I V, Knauer, J P, Loucks, S J, Marozas, J A, Marshall, F J, McKenty, P W, Regan, S P, Seka, W, Skupsky, S, and Smalyuk, V A. 2008.
"Performance of direct-drive cryogenic targets on OMEGA". United States. https://doi.org/10.1063/1.2856551.
@article{osti_21120387,
title = {Performance of direct-drive cryogenic targets on OMEGA},
author = {Goncharov, V N and Sangster, T C and Radha, P B and Boehly, T R and Collins, T J. B. and Craxton, R S and Delettrez, J A and Epstein, R and Glebov, V Yu and Hu, S X and Igumenshchev, I V and Knauer, J P and Loucks, S J and Marozas, J A and Marshall, F J and McKenty, P W and Regan, S P and Seka, W and Skupsky, S and Smalyuk, V A},
abstractNote = {The success of direct-drive-ignition target designs depends on two issues: the ability to maintain the main fuel adiabat at a low level and the control of the nonuniformity growth during the implosion. A series of experiments was performed on the OMEGA Laser System [T. R. Boehly, D. L. Brown, R. S. Craxton et al., Opt. Commun. 133, 495 (1997)] to study the physics of low-adiabat, high-compression cryogenic fuel assembly. Modeling these experiments requires an accurate account for all sources of shell heating, including shock heating and suprathermal electron preheat. To increase calculation accuracy, a nonlocal heat-transport model was implemented in the 1D hydrocode. High-areal-density cryogenic fuel assembly with {rho}R>200 mg/cm{sup 2} [T. C. Sangster, V. N. Goncharov, P. B. Radha et al., 'High-areal-density fuel assembly in direct-drive cryogenic implosions', Phys. Rev. Lett. (submitted)] has been achieved on OMEGA in designs where the shock timing was optimized using the nonlocal treatment of the heat conduction and the suprathermal-electron preheat generated by the two-plasmon-decay instability was mitigated.},
doi = {10.1063/1.2856551},
url = {https://www.osti.gov/biblio/21120387},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 15,
place = {United States},
year = {Thu May 15 00:00:00 EDT 2008},
month = {Thu May 15 00:00:00 EDT 2008}
}