Patent ID: 6907110

Claim:
An x-ray tube comprising: a stationary vacuum housing having a central axis; an electron-emitting cathode and a ring anode having an impact surface disposed in said vacuum housing; a deflection system disposed in said vacuum housing for interacting with electrons emitted by said cathode to focus and deflect said electrons to form an electron beam which is incident on said impact surface to generate x-rays; a round exit window for said x-rays disposed in a plane perpendicular to the central axis and terminating one side of said vacuum housing; said ring anode having a primarily triangular cross-section in a plane containing said electron beam, with a long side and a short side, said short side being directed toward said exit window and said impact surface being disposed on said short side, and said impact surface of said ring anode being beveled and aligned to said exit window; and an annular anode cooling arrangement surrounding said ring anode at an exterior of said vacuum housing.