公开(公告)号：US3826945A

公开(公告)日：1974-07-30

申请号：US33665673

申请日：1973-02-28

Applicant: INT STANDARD ELECTRIC CORP

Inventor： BEHENNA J ,  PHIPPS G

IPC: H01J21/18 ,  H01J3/32 ,  H01J29/76

CPC classification number: H01J21/18

Abstract: The output power of a magnetically focused thermionic electron tube is varied by altering the strength of the magnetic focusing field. In one embodiment, the output power of an oscillator using a magnetically focused triode may be reduced over a wide range by reducing the focusing field without any detrimental increase of intercepted beam current. The field is reduced by use of a magnetic shunt across the pole pieces of a permanent magnet used for focusing, the shunt being moved mechanically toward or away from the pole pieces. The device may also be used to control gate current in a gate controlled tube.

Abstract translation: 通过改变磁聚焦场的强度来改变磁聚焦热电子管的输出功率。 在一个实施例中，使用磁聚焦三极管的振荡器的输出功率可以通过减小聚焦场而在宽范围内减小，而不会有截获的束电流的任何有害的增加。 通过使用用于聚焦的永磁体的极片之间的磁分路来减小该场，该分流器机械地朝向或远离极片移动。 该器件还可用于控制栅极控制管中的栅极电流。