Single-photon 6MeV medical low-energy standing-wave accelerating tube

Abstract

The invention provides a single-photon 6MeV medical low-energy standing-wave accelerating tube, comprising a cavity chain body, wherein two ends of the cavity chain body are respectively connected with an electron gun and a target body; the side face of the cavity chain body is fixedly connected with a rectangular waveguide; the rectangular waveguide is fixedly connected with a microwave input window and a sputtering ion pump; the electron gun is a grid-control triode electron gun; in comparison with a diode electron gun, the grid-control triode electron gun is additionally provided with a grid; the grid can be used for better controlling beams and fine-tuning the X-ray dosage rate and energy, so that the electron beams can reach a stable state instantly and fast hit the target body, therefore X-rays are generated. The cavity chain body is an accelerating cavity chain consisting of 6-7 accelerating cavities with a beam aperture of 4-6 mm and a coupling cavity; the length of the cavity chain body is 27-33 cm; and according to the accelerating tube manufactured based on the design, the dose can reach the stable state in the beam outgoing moment.

Description

technical field [0001] The invention relates to an accelerating tube, in particular to a single-photon 6MeV medical low-energy standing wave accelerating tube. Background technique [0002] With the development of intensity-modulated radiotherapy, the intensity-modulated technology has higher and higher requirements on the hardware of the accelerator. It is required that the working state of the accelerator is stable in an instant, the dose rate is controllable, and the light output is fast. Therefore, higher requirements are put forward for the acceleration tube as the core component of the medical accelerator. Among the low-energy accelerators currently on the market, the electron guns of the accelerating tubes are mainly negatively controlled diode electron guns, whose beam current cannot be adjusted, and the quality of the resulting X-rays is not good, which cannot meet the clinical needs of precise radiotherapy. In addition, due to the electron bombardment problem exis...

AI Technical Summary

Problems solved by technology

Among the low-energy accelerators currently on the market, the electron guns of the accelerating tubes are mainly cathode-controlled diode electron guns, the beam current of which cannot be adjusted, and the quality of the resulting X-rays is not good, which cannot meet the clinical needs of precise radiotherapy.

In addition, due to the problem of electron rebound in the low-energy accelerating tube, the rebound power is relatively high, and it is easy to cause the breakdown of the electron gun grid

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