A Rotary Target Changing Mechanism Used in Cyclotron

Abstract

The invention relates to a rotary type target exchange mechanism for a circular accelerator. The rotary type target exchange mechanism comprises a stripping target disk, a plurality of radial grooves,a plurality of axial through holes, an optical transmitter and an optical receiver, wherein the stripping target disk is generally in a disk shape, can rotate around the central axis perpendicularlypenetrating through the disk shape and comprises a perfect circle area and an external annular section area; the radial grooves have a certain axial depth, penetrate through an axial front end face and are distributed in the annular section area at equal radians, and the axial depth of the radial grooves is smaller than the axial thickness of the stripping target disk; the axial through holes axially penetrate through the stripping target disk and are distributed on the circumference at equal radian intervals, the circumference is close to the peripheral surface of the stripping target disk and share the same center with the stripping target disk, the equal radian intervals among the axial through holes are the same as that among the radial grooves, and the axial through holes are not fewer than the radial grooves; the optical transmitter and the optical receiver are respectively fixed to the two axial sides of the stripping target disk, and fine columnar light beams transmitted by theoptical transmitter can penetrate through the plurality of the axial through holes one by one in a perpendicular incidence mode to be received by the optical receiver. Compared with a traditional location mode, location accuracy of the rotary type target exchange mechanism disclosed by the invention is greatly improved.

Description

technical field [0001] The invention relates to a cyclotron, in particular to a rotary target changing mechanism for the cyclotron. Background technique [0002] The rotary target changing mechanism used in the cyclotron, its movement process is in a relatively concealed space, it is not convenient to observe its movement process, sometimes the requirements for the movement positioning of the equipment are very high, and large deviations are not allowed, the follow-up of the equipment Work needs to be performed in a highly accurate position. For example, in the process of exfoliating and changing the target of a 100MeV proton cyclotron, the traditional method is to determine whether the difference between the voltage fed back by the electronic ruler and the given voltage falls within the working area of ​​the control card to determine the accuracy of the target changing position. Due to the mechanical error in the rotation of the target disc, it is difficult to achieve prec...

AI Technical Summary

Problems solved by technology

For example, in the process of exfoliating and changing the target of a 100MeV proton cyclotron, the traditional method is to determine whether the difference between the voltage fed back by the electronic ruler and the given voltage falls within the working area of ​​the control card to determine the accuracy of the target changing position. Due to the mechanical error in the rotation of the target disc, it is difficult to achieve precise positioning and cannot meet the requirements

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