Patent ID: 7443957
Filing Date: 2008-10-28
Classification: H01J,H05G

Abstract:
1. An x-ray apparatus comprising: a rotating envelope having a vacuum-sealed tube housing that is rotatable around a rotation axis by a drive unit; an annular anode mounted in said tube housing for co-rotation therewith, that generates heat during operation of the x-ray apparatus; an apparatus housing surrounding said tube housing and being fixedly connected with said tube housing for co-rotation therewith by connection elements that form an intermediate space between said apparatus housing and said tube housing; a cooling device comprising a fluid inlet in fluid communication with said intermediate space and a fluid outlet in fluid communication with said intermediate space, said cooling device circulating water in said intermediate space between said inlet and said outlet to bring said circulating water into thermal communication with said anode to transfer said heat from said anode; and said cooling device comprising a pressure generator in said rotating envelope that maintains said water at a pressure of more than 5 bar, at least in region of said anode, during operation of said x-ray apparatus exclusively due to centrifugal forces produced by rotation of said rotating envelope by said drive unit.