X-RAY TUBE Russian patent published in 2016 - IPC H01J35/22 

FIELD: medical equipment.

SUBSTANCE: invention relates to X-ray engineering, particularly to X-ray tubes for X-ray photoelectron spectroscopy. X-ray tube comprises a casing accommodating an anode, cathode, sample holder. Electrons, emitted by the cathode as a result of thermal emission, are being accelerated by the electrostatic field and, bombarding anode 2, cause characteristic, and braking radiation. Main part of braking radiation is being intercepted by a slot, created by the sample holder and cathode box 4, while the larger part of the characteristic radiation passes through the slot and is being is directed to the sample due to geometry of the recess on the inner surface of the anode. Cathode box and anode are mutually arranged so that due to generated configuration of electrostatic field the cathode electrons are being directed to the recess surface of the inner side of the anode, made in the form of a spherical belt, curvature center of which coincides with the position of the sample center, and distributed over the entire area of the recess, initiating, thus, characteristic radiation directed to the sample.

EFFECT: technical result is increased intensity of characteristic radiation directed to the sample.

1 cl, 1 dwg