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The Physics of Long-Pulse Wire Array Z-Pinch Implosions [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1999.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
34 pages : digital, PDF file
Additional Creators:
Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Recent improvements in z-pinch wire array load design at Sandia National Laboratories have led to a substantial increase in pinch performance as measured by radiated powers of up to 280 TW in 4 ns and 1.8 MJ of total radiated energy. Next generation, higher current machines will allow for larger mass arrays and comparable or higher velocity implosions to be reached, possibly extending these result.dis the current is pushed above 20 MA, conventional machine design based on a 100 ns implosion time results in higher voltages, hence higher cost and power flow risk. Another approach, which shifts the risk to the load configuration, is to increase the implosion time to minimize the voltage. This approach is being investigated in a series of experimental campaigns on the Saturn and Z machines. In this paper, both experimental and two dimensional computational modeling of the fist long implosion Z experiments will be presented. The experimental data shows broader pulses, lower powers, and larger pinch diameters compared to the corresponding short pulse data. By employing a nested array configuration, the pinch diameter was reduced by 50% with a corresponding increase in power of > 30%. Numerical simulations suggest load velocity is the dominating mechanism behind these results.
Report Numbers:
E 1.99:sand99-3154j
sand99-3154j
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Note:
Published through SciTech Connect.
12/14/1999.
"sand99-3154j"
11th Annual Special Issue of Physics of Plasmas FT
PETERSON,D.L.; SPIELMAN,RICK B.; DEENEY,CHRISTOPHER; RODERICK,N.F.; DOUGLAS,MELISSA R.; COVERDALE,CHRISTINE A.
Funding Information:
AC04-94AL8500012/14/1999
View MARC record | catkey: 14740242