X-ray tube cathode structure

Abstract

The invention relates to the technical field of X-ray tube preparation, in particular to an X-ray tube cathode structure, which comprises a gate (1), a cathode filament base (2), a transition socket (3), a ceramic base (4), a kovar steel base (5), electrode columns (6) and a cathode filament (7). The kovar steel base (5) is of a circular ring structure, and the ceramic base (4) is arranged in an inner ring of the kovar steel base (5) of the circular ring structure. A first circular groove (8) is formed between the ceramic base (4) and the inner ring of the kovar steel base (5) with the circular ring structure; the transition socket (3) is installed on the ceramic base (4), and a plurality of electrode columns (6) are arranged in the transition socket (3) and sequentially penetrate throughthe transition socket (3) and the ceramic base (4) to fixedly connect the transition socket (3) and the ceramic base (4). The cathode filament base (2) is placed on the transition socket (3) and is wrapped in the gate (1); and the cathode filament (7) is arranged on the cathode filament base (2) and is connected with the top of the gate (1).

Description

technical field [0001] The invention belongs to the technical field of X-ray tube preparation required by equipment such as industrial detection and medical CT, and in particular relates to a cathode structure of an X-ray tube. Background technique [0002] An X-ray tube is an instrument that uses high-speed electrons emitted by the cathode to strike a metal target surface to generate X-rays. There is a cathode wire in the cathode assembly to emit electrons, and the electrons from the cathode wire hit the anode target after being accelerated by a high voltage of thousands to hundreds of thousands of volts. [0003] Usually the cathode wire will be surrounded by a metal grid cover with openings at the front end, and the voltage of the grid cover is slightly lower than that of the cathode wire, which makes the electrons emitted by the cathode wire be compressed and focused at the front end of the grid. In order to prolong the service life of the X-ray tube cathode wire, the i...

AI Technical Summary

Problems solved by technology

Therefore, the existing X-ray tube cannot guarantee power supply for the cathode wire and the grid in the cathode structure of the X-ray tube without discharging.

However, the existing X-ray tube cathode structure generally has a complex structure, and the problem of time-consuming disassembly and replacement of parts

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