Electron discharge device

Details Electron discharge device Electron discharge device

G - Physics

21

K

358/26

G21K 1/08 (2006.01) H01J 33/00 (2006.01)

Patent

CA 1048171

ABSTRACT OF THE DISCLOSURE An electron discharge device is known wherein a stream of electrons generatad in an evacuated enclosed and extending over a broad area is passed through a thin window to a region of high pressure outside the enclosure. This invention improves such a device by positioning between the window and the electron emis- tion means of the device a structure which comprises a generally flat metal plate of high thermal conductance having closely spaced parallel slots extending over and covering the intended area of the electron beam. The bottom of each slot is disposed adjacent one surface of the plate and over its length and is provided with a row of closely spaced holes of the same diameter as the bottom width of the slot. The holes go through the remaining material leaving a small web between adjacent holes. The window is mounted of the slotted side of the plate while the side of the plate with the holes faces the emission means disposed in the evacuated enclosure. The plate preferably is provided with coolant flow passages for the continuous removal from the plate of significant amounts of heat generated by the impact of electrons on the plate and by electrons passing through the window.

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