Receptacle for receiving a plug connector of a high-voltage cable for a microfocus X-ray tube, plug connection for a high-voltage cable

An electrical receptacle comprising:

• a first end configured for receiving a high-voltage plug connector of a high-voltage cable and a second end configured for receiving a microfocus X-ray tube with a cathode, the cathode having a filament and a grid cap both of which are made of metal,
• wherein the receptacle comprises a ceramic insulator
• having a first cavity, a second cavity and a third cavity, the first cavity being formed at the second end in which electrical contacts are provided and configured for electrical connection with the filament and the grid cap, the electrical contacts being electrically coupled to electrical conductors within the first cavity;
• wherein the second cavity is formed between the first and third cavities, the second cavity configured for housing spring contacts for supplying current to the filament and a center pin configured for supplying voltage to the grid cap, the spring contacts and center pin being connected to the electrical conductors and arranged for connection to the high-voltage plug connector, and wherein an interior surface forming the second cavity is covered by a metal layer;
• wherein the third cavity is formed at the first end of the receptacle and is shaped and dimensioned to conform to and provide a precise interface connection with the high-voltage plug connector in an inserted state;
• and
• wherein the ceramic insulator has a grid mounting which, in an installed state, is conductively connected to the grid cap of the cathode, and the first cavity and the second cavity are surrounded in a radial direction by the grid mounting, wherein between the grid mounting and the ceramic body, an air gap is formed in the radial direction, and wherein at an end of the grid mounting that is remote from the filament, a circumferential groove is provided in an axial direction between the grid mounting and the ceramic insulator.