MAGNETIC FOCUSING SYSTEM OF O-TYPE MICROWAVE DEVICE Russian patent published in 1997 - IPC

FIELD: vacuum microwave devices. SUBSTANCE: device has magnetic periodic focusing system which is designed as sequence of opposite-polarity ring magnets with ring pole pieces. In addition device has magnetic screen which is located on side of electron gun and has central hole in its face side. In addition device has ring magnet, magnetic field rectifier, which is designed as sequence of alternating thin ring disks which are made from magnetically soft material and non-magnetic material. Rectifier is located in central hole of face side of magnetic screen, is coaxial to magnetic focusing system and conforms to given equations. EFFECT: increased functional capabilities. 2 cl, 4 dwg