Plasma source for therapeutic equipment and method of using same

Abstract

The invention relates to a plasma source for treatment equipment and an application method of the plasma source. The plasma source is characterized in that the plasma source comprises a gas cylinder,a flow control device, a microwave coupler, a discharge source body, a first vacuum chamber, a molecular pump and a mechanical pump. An outlet of the gas cylinder containing the working gas is connected with an inlet of the discharge source body through the flow control device via the microwave coupler. The microwave coupler is used for feeding microwaves emitted by the microwave system into the discharge source body, and the discharge source body is used for conducting microwave heating ionization on working gas to generate high-density plasma and leading out the high-density plasma to form an ion beam current used for being matched with treatment equipment. An outlet of the discharge source body is connected with an inlet of the first vacuum chamber, an outlet of the first vacuum chamberis connected with an inlet of the molecular pump, an outlet of the molecular pump is connected with an inlet of the mechanical pump, and an outlet of the mechanical pump is connected with the flow control device. The plasma source can be widely applied to proton treatment and neutron radiotherapy equipment.

Description

technical field [0001] The present invention relates to a plasma source, in particular to a plasma source for therapeutic equipment and a method of use thereof. Background technique [0002] The dose distribution of proton therapy has a unique Bragg peak, which can accurately kill tumor tissue compared with photon radiotherapy. Proton therapy is widely used in neutron radiotherapy (BNCT) and proton radiotherapy. At present, proton therapy is mainly based on three types of cyclotrons, synchrotrons, and linear accelerators. Among them, most of the low-energy ion implanters used in cyclotrons are negative hydrogen ion sources (H-), which are transported to the cyclotron by focusing and then accelerated. , The negative hydrogen ion source uses a filament to generate electrons, which collides with hydrogen to generate plasma. Its advantage is that it occupies a small area, and its disadvantages are that the beam intensity is small and the working life is short, and the filament n...

AI Technical Summary

Problems solved by technology

However, the low-energy ion implanter of conventional heavy ion cancer treatment equipment generally adopts high-frequency high-charge state ion sources, but the source body of high-frequency high-charge state ion sources is large in size, high in manufacturing costs, and has a long construction period, which cannot meet the requirements High load operation of proton therapy equipment

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