Patent ID: 6091800
Filing Date: 2000-07-18
Classification: H01J

Abstract:
An X-ray tube which includes:an anode (4) for producing X-rays (22) by incidence of electrons (10) on one side of the anode,the incident electrons forming a focal spot of given shape on the anode,means for cooling the surface at the other side of the anode by means of a cooling liquid,the cooling liquid being transported to and from the surface to be cooled by means of a supply tube (28) and a discharge tube (16), said two tubes being arranged so as to be coaxial with one another,the cooling liquid being applied to the surface to be cooled via a delivery opening (36) at the end of the supply tube, the shape of said delivery opening being adapted to the shape of the focal spot,a distribution member (30) which is arranged at the end of the inner one of the two coaxial tubes, is situated within the outer tube (16), and has a surface (32) which faces the surface to be cooled and in which the delivery opening (36) is provided,said surface (32) of the distribution member defining a return opening in conjunction with the outer tube (16),characterized in thatthe distribution member (30) includes an element (37) which is provided with a first duct (38) which constitutes a connection between the delivery opening (36) and the supply tube (28), andthat said surface of the distribution member is provided with a discharge opening (40) which is situated within the delivery opening (36) and communicates, via a further duct (52) in the element of the distribution member, with the outer surface (42) of the element.