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Insulator Modifications to Increase Plasma Source Duration on the ZaP Flow Z-Pinch

Author: Michal C Hughes
Requested Type: Poster Only
Submitted: 2011-06-10 18:10:20

Co-authors: U. Shumlak, B.A. Nelson, R.P. Golingo, S.D. Knecht, M.P. Ross, R.J. Oberto

Contact Info:
University of Washington
AERB, Room 120
Seattle, WA   98195
United States

Abstract Text:
The ZaP Flow Z-Pinch at the University of Washington is a basic plasma physics experiment that utilizes sheared axial flows to maintain gross plasma stability. The experiment uses an annular acceleration region followed by a cylindrical assembly region in which the plasma column is formed and maintained. Once the Z-pinch is formed, flowing plasma from the accelerator maintains the shear required for stability. Past run campaigns have either used changes in the injector parameters or the annular area to alter the characteristics of the bulk plasma. The gas pressure and injection timing have been optimized for different inner electrode sizes. Previous results show that the lifetime of the plasma is limited by the current from the power supply and by the plasma source from the accelerator. The available power from the supply has previously been improved. The length of the insulated annulus will be increased to determine a method to prolong the stabilizing flow of plasma and thus the stability of the Z-pinch. The gas injection will be re-optimized to compare the new parameters to the former campaigns.

Characterization: A2

Comments:
Please place posters from first authors M.C. Hughes, R.P. Golingo, and M.P. Ross together in the following order:
1. M.C. Hughes
2. R.P. Golingo
3. M.P. Ross