John M Schuster

US Patent:

45299552, Jul 16, 1985

Filed:

Mar 9, 1982

Appl. No.:

6/356458

Inventors:

John R. Schuster - Encinitas CA
Hakan N. Lofstedt - San Diego CA

Assignee:

FDX Patents Holding Company, N.V. - De Ruyterkade

International Classification:

H01F 500

US Classification:

335300

Abstract:

Disclosed is a method and apparatus for controlling coolant distribution in ohmic heating and other poloidal field magnetic coils. The apparatus consists of a coolant inlet and outlet arrangement with spiral coolant channels positioned therebetween. The spiral coolant channels are designed to control the coolant pressure drop within the coil turns and hence the coolant flow distribution within the entire coil. The coolant channels of the present invention provide coil turns with improved structural and cooling characteristics over the prior art. The method disclosed consists of controlling the flow distribution of cooling fluid through coolant channels in a magnetic coil by using spiral channels of a specially designed length, width and spiral configuration.

US Patent:

46577238, Apr 14, 1987

Filed:

Feb 1, 1985

Appl. No.:

6/696897

Inventors:

John R. Schuster - Encinitas CA
Char Y. Lee - Solana Beach CA
Carl F. Weggel - San Diego CA

Assignee:

FDX Patents Holding Company, N.V. - New York NY

International Classification:

G21B 100

US Classification:

376146

Abstract:

A coolant arrangement is disclosed for magnetic coil turn assemblies in which cooling fluid is flowed through a supply header along the face of a coil turn and into coolant inlet openings positioned along the face of the coil turn beneath the supply header structure. Coolant is directed through coolant channels around the magnetic coil turn, and into outlet openings. The outlet openings are in fluid communication with a return header also positioned on a flat face of a magnetic coil turn. There is also disclosed a method and apparatus for passing coolant through adjacent coolant channels in a magnetic coil turn in opposite directions. The cooling means disclosed avoids creating hot spots in the vicinity of the coolant inlets and outlets and reduces stresses in the coil in the vicinity of the coolant inlets and outlets. It also provides for maintaining a uniform average temperature throughout the coil turn. In addition, the cooling structure disclosed simplifies fabrication of the coil and is compact in nature so as to create favorable hydraulic and thermal conditions in environments where space limitations are crucial.