Two-photon medical moderate-energy stationary wave accelerating tube

Abstract

The invention provides a two-photon medical moderate-energy stationary wave accelerating tube. The two-photon medical moderate-energy stationary wave accelerating tube comprises a cavity chain body, an electron gun sealing at the two ends of the cavity chain body and a deflection device with a titanium window. The side surface 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 sputter ion pump; the cavity chain body is a accelerating cavity chain formed by a accelerating cavity and a coupled cavity, wherein the beam aperture of the accelerating cavity is between 6 mm and 8 mm; and the length of the cavity chain body is between 1.2 m and 1.4 m. According to the invention, the above beam aperture and cavity chain body are combined to use, and the total length of the accelerating tube is less than 1.6 m, so that the accelerating tube has medium length and high shunt impedance. Therefore, the accelerating tube is compatible with output dosage rate and ray quality of a low-energy accelerating tube and a moderate-energy accelerating tube, after the electronic targeting is achieved, any second gear 6-14MeV X-ray radiation can be offered and the output dose rate is not less than 3Gy / min.m, and any third gear 5-14MeV E radiation can be offered and the dose rate is not less than 4Gy / min.m.

Description

technical field [0001] The invention relates to an accelerating tube, in particular to a two-photon medical medium energy standing wave accelerating tube. Background technique [0002] Radiation therapy plays an important role in the treatment of malignant tumors. Although new methods are emerging every year, the status of radiation therapy has not been reduced. About 70% of tumor patients need radiation therapy. The development of radiation therapy is closely related to the development of accelerator technology. Medical electron linear accelerator is currently the most widely used and the largest number of radiation therapy devices in hospital clinical radiation therapy. According to energy, medical electron linear accelerators can be divided into three types: low-energy machines (4-6MeV), medium-energy machines (8-15MeV) and high-energy machines (20-25MeV). [0003] 6MeV single-photon accelerators are widely used in hospitals because of their compact structure, light weig...

AI Technical Summary

Problems solved by technology

The core problem existing in the medium-energy accelerating tubes of the prior art is that the accelerating tube is too long, generally greater than 1.8m, and cannot simultaneously take into account the output dose rate and ray quality of the low-energy and medium-energy energies under a large field of view, and the ray energy scatter Poor, the size of the beam spot and the target point are not easy to adjust after the electron beam is accelerated to the end of the acceleration tube and deflected

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