Magnetron device with cooling fluid flow in longitudinal direction of magnetron tube

Claim 2

A magnetron device comprising: a magnetron tube having a longitudinal axis; a permanent magnet for operating said magnetron tube, said permanent magnet being disposed outside said magnetron tube; a magnetic yoke coupling said magnet and said magnetron tube for forming a magnetic circuit between said magnet and said magnetron tube; and cooling means containing said magnetron tube and said permanent magnet, said cooling means comprising: a metal housing enclosing said magnetron tube and said magnet; and a plurality of cooling vanes having faces which are arrange substantially radially with respect to said longitudinal axis Of said magnetron tube to define paths for the flow of cooling fluid in a direction substantially in parallel with the longitudinal axis of said magnetron tube, the inner edge of each of said cooling vanes being attached to the outer circumferential surface of said magnetron tube, and the outer edge of each of said cooling vanes being disposed adjacent to the inner surface of said metal housing.

Claim 3

A magnetron device according to claim 1, further comprising a cap member removably secured to said housing.

Claim 4

A magnetron device according to claim 1, wherein said outer edges of each of said cooling vanes are attached to said metal housing.

Claim 5

A magnetron device according to claim 1, wherein said magnet is accommodated between a pair of cooling vanes.

Claim 6

A magnetron device according to claim 1, wherein one surface of the magnetron tube perpendicular to the direction of the longitudinal axis of the magnetron tube has a cathode bushing, the other surface of the magnetron tube perpendicular to the direction of the longitudinal axis of the magnetron tube has an output dome, and one edge of each of the cooling vanes on the side of the output dome is formed with an inclined relationship to the circumferential surface of said tube, and further comprising: a cap element detachably connected to said metal housing on the side of said cathode bushing and receiving said cathode bushing; and means forming ducts for blowing and receiving cooling fluid, said duct forming means being detachably connected to the inclined side of the cooling vanes with said ducts being in a direction substantially perpendicular to the longitudinal axis of the magnetron tube, such that cooling fluid introduced to one side of the cooling vanes through said blowing duct is passed through at least some of said cooling paths, through said cap element, and through the others of said cooling paths, the cooling fluid being exhausted through said receiving duct.