Bent wing-type radio-frequency quadrupole accelerator

Abstract

The invention relates to the technical field of an acceleration mechanism of an ion accelerator, in particular to a bent wing-type radio-frequency quadrupole accelerator. The bent wing-type radio-frequency quadrupole accelerator is characterized by comprising a cavity, wherein four wings are arranged in the cavity, end plates are respectively arranged at the two ends of the cavity, a beam hole is arranged at the central position of each end plate, the central line of the two beam holes and the central axis of the cavity are on the same straight line, and a Pi-model stabilization rod and a tuner for adjusting frequency are further arranged on the cavity. By bending wings at pole head parts, the cross section size of the cavity is greatly reduced on the condition of no change on the total transverse length of the wings, and the bent wing-type radio-frequency quadrupole accelerator is very suitable for low-frequency beams; and meanwhile, due to the compatibility with the advantages of simplicity and effectiveness of a cooling system of the traditional four-wing radio-frequency quadrupole acceleration mechanism, the bent wing-type radio-frequency quadrupole accelerator is very suitable for a continuous-wave working state. Obvious advantages are shown on the aspects of reduction on processing difficulty of the radio-frequency quadrupole accelerator, reduction on engineering cost, improvement on running reliability and stability of a device and the like.

Description

technical field [0001] The invention relates to the technical field of ion accelerator acceleration mechanisms, in particular to a bent airfoil radio frequency quadrupole accelerator. Background technique [0002] The radio frequency quadrupole (RFQ) accelerator that appeared in the 1970s played a huge role in promoting the rapid development of accelerators in the world. The RFQ accelerator integrates beam acceleration, focusing and beam focusing, and is mainly suitable for the acceleration of low-energy beams, and is generally used as an injector for medium- and high-energy accelerators. At present, the accelerating structure of low-frequency RFQ accelerators commonly used by people is mainly a four-bar structure. When working in a continuous wave (CW) state, it is required that the RFQ accelerator must have a reasonable cooling system to effectively deal with the large amount of heat generated by the cavity during continuous operation. However, the cooling system of the ...

AI Technical Summary

Problems solved by technology

However, the cooling system of the four-rod RFQ accelerator is quite complicated. It generally consists of electrode cooling channels, support plate cooling channels, pad cooling channels and bottom plate cooling channels. great difficulty

At the beginning of this century, the American Argonne Laboratory (ANL) proposed a windowed four-wing RFQ acceleration structure, which is also suitable for low frequency ranges, but its disadvantage is also that the cooling system is complicated

[0003] Theoretically speaking, the traditional four-wing RFQ accelerator acceleration structure can also be used in the low-frequency field, and the acceleration structure has the advantages of simple and effective cooling system, but when it is applied in the low-frequency field, its cross-sectional size is often large. Take the four-wing RFQ accelerator at Michigan State University (MSU) as an example. Its operating frequency is 80.5MHz and the inner diameter of the cavity reaches 940mm. Welding furnace, the most important thing is that the processing accuracy is not easy to guarantee

Images