公开(公告)号：US3689790A

公开(公告)日：1972-09-05

申请号：US3689790D

申请日：1971-04-29

Applicant: PEPI INC

Inventor： HAAS DAVID J ,  PICHERT JEROME

IPC: H01J35/28 ,  H01J35/04

CPC classification number: H01J35/28 ,  H01J35/24

Abstract: A sealed-off X-ray tube having a convex target surface facing an electron beam source and carried by a rigid support mounted for rotary pivotal motion about a fixed pivot point. A bellows is sealed vacuum tight to the target and to the wall of the tube around the pivot point so that the target, the bellows, and the envelope of the tube form a closed surface. Conduits extend through the pivotal bearing to direct the flow of cooling fluid against the back surface of the target and carry the fluid away. The target surface is spherically convex with a center of curvature at the pivot point. The axis of the target precesses about the axis of the tube but the target does not rotate on its own axis. The target may be moved manually or by motor and with a linear, circular or spiral motion. Because of the curvature of the target, the electron optical forces are substantially unaffected by the precessing motion, and virtually constant X-ray beams radiate through windows of the tube.

Abstract translation: 一种封闭的X射线管，其具有面向电子束源的凸目标表面，并由刚性支撑件承载，用于围绕固定枢转点旋转枢转运动。 真空密封的波纹管密封到目标和围绕枢转点的管壁上，使得靶，波纹管和管的封套形成封闭的表面。 导管延伸通过枢转轴承以将冷却流体的流动引导到靶的后表面并将流体携带。 目标表面在枢轴点处具有曲率中心的球形凸起。 目标的轴线围绕管的轴线进行，但目标物体不会在其自身的轴线上旋转。 目标可以手动或通过马达和线性，圆形或螺旋运动来移动。 由于目标的曲率，电子光学力基本上不受进动运动的影响，实际上恒定的X射线束通过管的窗口辐射。