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Field reversal produced by a plasma gun

Description: Experimental results are presented of the production of Field-Reversed Plasma with a high energy coaxial plasma gun. The gun is magnetized with solenoids inside the center electrode and outside the outer electrode so that plasma emerging from the gun entrains the radial fringer field at the muzzle. The plasma flow extends field lines propagating a high electrical conductivity, the flux inside the center electrode should be preserved. However, for low flux, the trapped flux exceeds by 2 or more the initial flux, possibly because of helical deformation of the current channel extending from the center electrode.
Date: April 2, 1980
Creator: Hartman, C.W.; Condit, W.; Granneman, E.H.A.; Prono, D.; Smith, A.C. Jr.; Taska, J. et al.
Partner: UNT Libraries Government Documents Department

Use of coaxial plasma guns to start up field-reversed-mirror reactors

Description: Application of a magnetized coaxial plasma gun for start-up of a field-reversed-mirror reactor is considered. The design is based on preliminary scaling laws and is compared to the design of the start-up gun used in the Beta II experiment.
Date: March 19, 1980
Creator: Smith, A.C. Jr.; Carlson, G.A.; Eddleman, J.L.; Hartman, C.W. & Neef, W.S. Jr.
Partner: UNT Libraries Government Documents Department

Studies of the formation of field reversed plasma by a magnetized co-axial plasma gun

Description: The gun injects axially into a drift tank followed by a magnetic mirror. For the experiments reported here, only the guide coils outside the vacuum vessel and solenoids on the plasma gun electrodes were used; the mirror coil was not energized. A stainless steel flux conserver is placed in the mirror throat to prevent the plasma from contacting the nonconducting vacuum wall in the region of the mirror. An axis encircling array of magnetic loop probes includes four diamagnetic loops and a loop which measures the azimuthally averaged outward pointing radial component of magnetic field. These loop probes are stainless steel jacketed and form a flux conserving boundary (at a radius = 30 cm) for plasma emitted from the gun. A five tip probe that can be positioned anywhere along the axis of the experiment is used to measure internal components of magnetic field.
Date: May 28, 1980
Creator: Turner, W.C.; Granneman, E.H.A.; Hartman, C.W.; Prono, D.S.; Taska, J. & Smith, A.C. Jr.
Partner: UNT Libraries Government Documents Department

Startup of reversed-field mirror reactors using coaxial plasma guns

Description: Preliminary calculations are given that indicate that a coaxial plasma gun might scale reasonably to reactor-grade operating conditions. Ongoing experiments and numerical simulations should shed some light on the validity of the described scaling laws.
Date: November 9, 1979
Creator: Smith, A.C. Jr.; Hartman, C.W.; Carlson, G.A.; Neef, W.S. Jr. & Eddleman, J.L.
Partner: UNT Libraries Government Documents Department