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The behavior of liner surfaces used for magnetized target fusion compression to the MG field level

Author: Richard E. Siemon
Requested Type: Consider for Invited
Submitted: 2006-12-18 20:37:01

Co-authors: B.S. Bauer, T.J. Awe, M.A. Angelova, S. Fuelling, T.S. Goodrich, I.R. Lindemuth, V. Makhin, and R. Presura, University of Nevada, Reno, Nevada; W..L. Atchison, R.E. Reinovsky, P.J. Turchi, Los Alamos National Laboratory, Los Alamos, New Mexico, USA; J.H.

Contact Info:
University of Nevada, Reno
217 Bret Harte
Reno, NV   89509

Abstract Text:
At the energy density required for Magnetized Target Fusion (MTF), the liner, or in general any pusher material that compresses the target, is subjected to high pressures and intense Ohmic heating, as well as radiation and possibly particle bombardment from the target plasma. A series of experiments are underway to study the response of aluminum to the megabar pressures and MG fields anticipated in MTF experiments. To allow good diagnostic access, a simple geometry has been adopted. The MG fields are generated at the surface of cylindrical metal conductors that carry current. The configuration is therefore a classic z pinch in which the metal to be studied is the object being pinched. At MG fields the pressure is so high that material strength can mostly be ignored, and the configuration is unstable to the classic MHD modes. Generally parameters are chosen so that the growth time for instability is longer than the time to reach peak field, and in addition the skin depth of the field is chosen to be small compared to the conductor radius. This skin depth regime is distinct from that of exploding wires in which the skin depth is made larger than the conductor radius. Exploding wire type experiments are also used in some UNR low-energy experiments for the purpose of high-temperature diagnostic development. Recent progress and experimental results will be presented, and plans for future work on the Shiva Star facility will be described. Additional papers at this meeting on modeling and experimental design will be presented by V. Makhin, and S. Fuelling.

Characterization: C


University of Maryland

Innovative Confinement Concepts Workshop
February 12-14, 2007
College Park, Maryland

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