Welding method of four-wing octagonal radio frequency quadrupole cavity

Abstract

The invention relates to a welding method of a four-wing octagonal radio frequency quadrupole cavity. The welding method includes the steps that finish machining is conducted on the inner surfaces and the outer surfaces of electrodes and side wings; the electrodes and the side walls are cleaned; electrode soldering flux tanks are arranged, and soldering flux filling is conducted; the electrodes and the side wings are combined and spliced; the assembling gap of welding faces is measured and regulated; and a vacuum cavity is formed by welding the electrodes and the side wings through a vacuum brazing furnace. The cavity prepared through the method mentioned above comprises the horizontal electrodes, the vertical electrodes and the side wings; and the corresponding electrode soldering flux tanks are arranged on the two sides of each electrode, the soldering flux tanks are filled with silver-copper alloy soldering flux, and the size of the soldering flux welding tanks is regulated according to the size of the welding faces. The welding method has the beneficial effects that the welding process is simple; by selecting the soldering flux and controlling the temperature of the welding process, outflow of the soldering flux towards the interior of the cavity is reduced to a great extent, and the soldering flux is uniformly diffused; and no soldering flux exits in the cavity, the problem that high-pressure ignition is generated when the RFQ cavity operates at a high frequency can be solved, and normal operation of the RFQ cavity is ensured.

Description

technical field [0001] The invention relates to the technical field of manufacturing technology of products in the high-frequency technical field, in particular to a welding method for a cavity of a four-winged octagonal radio frequency quadrupole field accelerator. Background technique [0002] The radio frequency quadrupole (Radio Frequency Quadrupole, RFQ) accelerator cavity is the core component of the RFQ linear accelerator, and its manufacturing level is one of the keys that affect the performance parameters of the accelerator. Through the wavy modulation lines on the four wings, a longitudinal electric field is generated on the beam center line of the cavity, thereby accelerating the beam. Its stability and reliability are very important to the accelerator. Therefore, can RFQ be guaranteed through a good welding process? The welding quality of the accelerator cavity is directly related to the stability and consistency of the resonant frequency of the electric field of...

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Problems solved by technology

[0003] The object of the present invention is to overcome the defect in the prior art, provide a kind of welding method of four-winged octagonal radio frequency quadrupole field accelerator cavity, the radio frequency quadrupole field accelerator cavity prepared by this method can largely Reduce the flow of solder into the cavity, solve the problem of high-voltage ignition of the RFQ cavity during high-frequency operation, and ensure the normal operation of the RFQ cavity

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