Square hole particle beam collimator with continuously adjustable aperture and aperture adjusting method thereof

Abstract

The invention discloses a square hole particle beam collimator with continuously adjustable aperture and an aperture adjusting method thereof, in the collimator, a rotating disc is arranged in a collimator main body, a disc through hole and a plurality of arc-shaped guide grooves are formed in the rotating disc, a pair of first collimation blocks and a pair of second collimation blocks are respectively arranged on two sides of the rotating disc, and the first collimation blocks and the second collimation blocks are arranged on the two sides of the rotating disc. Each collimation block is also provided with a contact sleeve, and each contact sleeve slides along the arc-shaped guide groove when the rotating disc rotates. A linkage assembly connected with the power output tail end of the aperture adjusting driving mechanism is further arranged on the outer side of the rotating disc. According to the aperture adjusting method, when the rotating disc rotates, the arc-shaped guide grooves drive the contact sleeve to move so as to drive the first collimation block and the second collimation block to conduct opening and closing actions, and when the channel distance between the first collimation block and the second collimation block changes, the aperture of the square hole changes along with the change of the channel distance between the first collimation block and the second collimation block. The collimator is compact in structure and convenient to use, and can be well applied to Chinese spallation neutron source associated proton beams.

Description

technical field [0001] The invention relates to the technical field of collimators, in particular to a square hole particle beam collimator with continuously adjustable aperture and a method for adjusting its aperture. Background technique [0002] The China Spallation Neutron Source Associated Proton Beam Experiment Device is a device that uses a certain energy proton beam generated by a linear accelerator to conduct particle experiments. During the experiment, the negative hydrogen ions generated by the ion source were accelerated to 80MeV energy by the electrostatic field and the radio frequency electric field, and the negative hydrogen ions were partially transformed into hydrogen atoms and hydrogen ions in the process of acceleration or transportation. At the end of the straight tunnel, the negative hydrogen ions in the particle beam are deflected by the magnetic field to the fast-cycle synchrotron; the hydrogen atoms enter the waste beam station; the hydrogen ions ente...

AI Technical Summary

Problems solved by technology

Therefore, the adjustable aperture collimator driven by multiple motors is difficult to apply in the existing tunnels of the associated proton beams of the China Spallation Neutron Source. At the same time, its equipment has high energy consumption, complex equipment structure, and difficult design of surrounding shields, which is not conducive to cost. control

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