Repeat frequency fast pulse hard x-ray generator

Abstract

A repetitive frequency fast pulse hard X-ray generator, diode of the invention is constructed by fixed supporting tubular and sliding supporting tubular, they are connected tightly by the bellows, and grooved rail is set on the bell socket part, rotating otter cylinder is set at the outer to drive the sliding supporting tubular move along the grooved rail; cathode connecting bar is set at the axis in cavity, the front end is cathode target; conical packing ring is set in the cavity of diode to divide the cavity into fore vacuum chamber and back oil recess; anode assembly are fixed at the fore and outer end of the diode. The invention designs the diode to be an active structure, that resolves the technique puzzle of stability of power source, vacuum tightness of diode, axiality of dynamic and static supporting, flexible adjustment on-line; on the precondition of not destroying the vacuum, adjusting aspect ratio flexibly can be realized, the current detecting detector is built; it possesses advantages of flexible structure, repeatable frequency or running for one time, and the pulse width, intensity and power spectrum can be adjustable continuously, it compensates for defects of current technique, and it provides ideal field of radiation for development and application of new type rapid response detector, building fast pulse hard X-ray metering standard, physical mechanism research of diode and pulse ray dynamic imaging technique.

Description

technical field [0001] The invention belongs to the improvement of the structure of the fast pulse hard X-ray source with repetition frequency, in particular the improvement of the vacuum electron beam diode structure, and relates to the technical field of pulse power application. Background technique [0002] Vacuum electron beam diode is a device that generates pulsed hard X-rays. Its structural principle is: a stable repetitive frequency fast pulse voltage is applied between the cathode and anode of the diode, and the electron beam is emitted from the cathode target surface, which is accelerated under the action of the pulse electric field. To the anode target, the energy is converted through collision and radiation to generate a fast pulse hard X-ray radiation field in which the characteristic X-ray and bremsstrahlung spectra are superimposed on each other. The operating frequency, voltage parameters and stability of the pulse voltage are mainly controlled by the pulse po...

AI Technical Summary

Problems solved by technology

Although this device can generate fast pulse hard X-rays, its energy storage time is long, and the diode structure is fixed, it is difficult to replace the cathode target material, the aspect ratio of the diode cannot be adjusted, there is no means of current monitoring, and the flexibility and stability of the radiation field operation are also limited. not good

These defects cannot meet the needs of applications such as fast-response detector calibration for stable, fast-pulse hard X-ray radiation fields with flexible parameter control

[0004] In addition, it is difficult to establish an effective current monitoring method for conventional small diodes

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