Actions for Material end-plugging for the Scylla IV-P linear theta pinch

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Material end-plugging for the Scylla IV-P linear theta pinch

Author
Hansborough, L. D.
Published
United States : [publisher not identified], 1977.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1977.
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Cole, T. R., Commisso, R. J., and Williamson, Jr, K. D.

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Summary
Scylla IV-P is a 5-m linear theta pinch at the Los Alamos Scientific Laboratory primarily used to study end effects of linear theta-pinch plasmas. One method that may be used to reduce plasma end loss from linear theta pinches is to insert material end plugs. Two different assemblies that insert end plugs have been fabricated and installed on Scylla IV-P. The presence of the material end plugs have been found to increase the plasma confinement time by 20 to 30 percent; the plasma stability is increased (the m = 1 wobble is suppressed), and the neutron production is not degraded. The design of the end plug insertion mechanisms is described in some detail and information is presented on end plug erosion. Material eroded from the end plug must be either removed by the vacuum system or it plates out on the vacuum system surfaces. A condensed gas end plug has been proposed to eliminate problems associated with ablated solid material; a third end plug assembly for this is being designed which inserts a cryostat coated with a condensed gas. A prototype of this cryogenically cooled end plug (cryo-plug) has been fabricated and tested. These data are presented and the insertion mechanism described.
Report Numbers
LA-UR-77-2453; CONF-771029-27
Other Subject(s)
Collection
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: W-7405-ENG-36
OSTI Identifier 5364615
Research organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States).
View MARC record | catkey: 47044290