| 摘要 |
PURPOSE:To obtain a lightweight target for a rotary anode x-ray tube with good efficiency that is more suitable to large capacity and high speed rotation by providing a number of obliquely radial slits on an x-ray irradiation surface provided with a thin film such as tungusten in the depth that is equal or equivalent to the thickness of the thin film and in the width that does not exceed the x-ray irradiation focal point dimensions. CONSTITUTION:An x-ray irradiation film 1 made of tungusten or its alloys is rigidly applied and formed on the x-ray irradiation surface of the upper periphery of a substrate 3 made of nonmetallic single material. While an x-ray tube is operating, this target is rotated by a rotary operation shaft connected through a rotor connecting hole 2 under vacuum atmospheres and simultaneously the x-ray irradiation film 1 receives the irradiation of a high energy electron beam from the vertically upper part and then is heated. The x-ray irradiation film 1 is formed on the substrate 3 in a donut form except an upper end face 4 and divided into a number of parts by a slit 5. The slit 5 is formed in an obliquely radial form at a fixed angle of inclination for the x-ray irradiation direction 6. |
