Performance of direct-drive cryogenic targets on OMEGA
- 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)
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.
- OSTI ID:
- 21120387
- Journal Information:
- Physics of Plasmas, Vol. 15, Issue 5; Other Information: DOI: 10.1063/1.2856551; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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