Other
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dpplp1069w&link_type=abstract
American Physical Society, 44th Annual Meeting of the Division of Plasma , abstract #LP1.069
Other
Scientific paper
Dramatic increases in the total radiated energies were seen in Al wire array experiments on the Saturn generator at Sandia National Laboratories when it was operated in a long current-risetime mode (>= 140 ns) as opposed to a short-risetime mode. This enhanced energy output requires an enhanced coupling of the Saturn generator to the Z-pinch plasma as well as an efficient and enhanced transport of the coupled energy into the plasma. One mechanism for enhancing generator coupling is through the growth of micro-instabilities at the pinch surface. To investigate the applicability of this idea, three series of long-risetime Al experiments are analyzed. In one series, array masses were varied; in another, radius and mass changes were made; in the third, array lengths were varied. In each series, all other load parameters were held fixed. These implosions are modeled using a 1-D MHD code that includes enhanced energy coupling and energy transport due to surface micro-instabilities. Results will be presented that illustrate the process by which enhanced energy couplings lead to enhanced x-ray outputs and that compare the x-ray data trends seen in the long-risetime experiments with those seen in the modeling. plasmas. calculations
Apruzese John P.
Coverdale C. A.
Davis Jared
Deeney Chris
Thornhill J. W.
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