Mechanical structure of high-frequency electric focusing ion accelerating device and assembling method thereof

Abstract

The invention relates to a mechanical structure of a high-frequency electric focusing ion accelerating device and an assembling method thereof. The mechanical structure comprises a left horizontal single wing, a right horizontal single wing, an upper vertical single wing, a lower vertical single wing, a front end cover and a rear end cover, which form a high-frequency cavity; drift tube assembliesand radio frequency quadrupole field sections are alternately arranged on the central axis of the cavity; and a drift tube supporting rod in the drift tube assembly is fastened on the single wing through a first fastening part. The two ends of the drift tube assembly are tensioned and positioned; meanwhile, the fit clearance between the drift tube assembly and the single wing is slightly relaxedby utilizing the tightness function of the fastening part in the assembly process; over-positioning of the drift tube assembly in the cavity structure is eliminated; the assembly difficulty of the cavity is reduced; and the structural stability and collimation adjustment of the drift tube and the single wing are guaranteed. After the whole cavity is assembled, the coaxiality of the internal drifttube is better than + / -0.10 mm, the field flatness of each gap of the cold measurement drift tube section is better than 1.3%, the field symmetry of each quadrant of the radio frequency quadrupole field section is better than 3%, and the field symmetry is better matched with a theoretical value.

Description

technical field [0001] The invention relates to the field of mechanical structure of an ion accelerator in nuclear energy technology, in particular to a mechanical structure of a high-frequency electric focusing ion accelerator and an assembly method thereof. Background technique [0002] The high-frequency electric focusing ion accelerator is a device for accelerating high-current and low-energy ion beams. This structure combines the acceleration function and the horizontal and vertical focusing functions in the same high-frequency cavity. The structure is compact and the cavity shunt impedance High, high-frequency power consumption is small, the acceleration gradient is high, and it has a good application prospect. [0003] At present, the high-frequency electric focusing ion accelerator is a CH type drift tube structure mixed with a four-wing radio frequency quadrupole structure in the same cavity. For example, the patent document of application number 201320375926.X disc...

AI Technical Summary

Problems solved by technology

[0005] 1. The assembly precision of the whole cavity is high, and the manufacturing tolerance control of parts is strictly required

[0006] 2. The drift tubes are distributed crosswise, and the two ends are positioned, the structure is complex and the assembly is difficult

[0007] 3. The cavity structure has been positioned

[0009] It can be seen that due to the above difficulties in the mechanical structure of the high-frequency electric focusing ion accelerator in the prior art, it is difficult to meet the corresponding precision requirements, and it is even easy to cause the failure of the cavity assembly

Images