X-RAY TUBE AND X-RAY FLUORESCENCE ANALYSER UTILIZING SELECTIVE EXCITATION RADIATION

摘要

An X-ray tube comprises a cathode, an anode with an electron receiving surface, and a window facing the electron receiving surface of the anode. On the electron receiving surface of the anode it comprises a layer of anode material. Deeper in the anode than said layer of anode material there is a block of attenuator material. The atomic number of said attenuator material is less than one third of the atomic number of the anode material.