RU94027659A - Zero-type microwave device - Google Patents

Abstract

FIELD: microwave devices. SUBSTANCE: device has electron gun, gun's magnetic screen which has centered hole in its face wall, magnetic periodic focusing unit which is designed as series of ring magnets which follow one another and alter in their polarity. Ring magnets have end pole pieces. Pole piece which is located closest to gun is spaced from face wall of magnetic screen by non-magnetic space which sizeand diameter of screen hole conform to condition of d≅D≅d, where lis length of non-magnetic space along device axis; L is period of focusing unit; D is diameter of centered hole in face wall of magnetic screen of gun; d, dare respectively inner and outer diameters of ring pole piece of magnetic focusing unit. EFFECT: decreased weight and size of focusing unit magnetic ring which is closest to gun, simplified design of device between screen of gun and initial piece of magnetic focusing unit. 4 dwg

Claims (1)

The aim of the invention is to reduce the weight and dimensions of the magnetic ring MPPS closest to the gun, as well as to simplify the design of the device in the area between the gun screen and the initial MPPS section. In a “0” type microwave device containing an electron gun, a magnetic shield of the gun with a central hole in its end wall, a magnetic periodic focusing system MPPS from a series of ring magnets with opposite pole tips successive with opposite polarity, the pole tip closest to the gun MPFS is installed from the end wall of the magnetic screen with a non-magnetic gap, the magnitude of which and the diameter of the screen opening are determined from the ratio given in the description.