Method and system for measuring high-energy proton beam spot in front of target

Abstract

The invention discloses a method and a system for measuring a high-energy proton beam spot in front of a target, and the method comprises the steps: arranging a pinhole device which can be used for pinhole imaging between a gamma ray detector and a target station, and transmitting an image of a secondary gamma ray of a target surface in a dihedral direction of the target station to a pixel type gamma ray detector by combining a pinhole imaging principle, so that the beam spot distribution information of the incident protons on the target surface can be obtained through the detected distribution information of the secondary gamma rays on the target surface, and a distribution image of the beam spots of the incident protons can be obtained in real time. Due to the fact that the method and the system for measuring the pre-target high-energy proton beam spot can avoid a strong-radiation target area, the system is suitable for measuring the pre-target high-energy proton beam spot of a high-power spallation neutron source, an accelerator driving subcritical system and other large devices, and the higher the power of the incident proton beam for targeting is, the better the measuring effect is.

Description

technical field [0001] The invention relates to the field of beam current measurement, in particular to a method and system for measuring a high-energy proton beam spot in front of a target. Background technique [0002] Spallation neutron sources and accelerator-driven subcritical systems (ADS) at home and abroad are high-energy and high-power proton beam-driven spallation target devices. The common feature of these large-scale devices is to use high-energy and high-power proton beams to bombard heavy element targets, and release a large number of neutrons with the occurrence of spallation reactions. Spallation neutron sources generally have a proton beam targeting power ranging from hundreds of kilowatts to several megawatts, and the design power of ADS generally exceeds the order of ten megawatts. The beam spot of the target proton beam output from the accelerator is between uniform and Gaussian distribution, which has great uncertainty. In order to reduce the maximum p...

AI Technical Summary

Problems solved by technology

However, this method can only perform a single measurement and cannot track in real time, and once the target is strongly activated, it is difficult to place and remove the aluminum film

[0006] Judging from the above methods currently used in the world, they all have limitations, and if the power of the target proton beam is further increased in the future, the measurement of the high-power proton beam spot in front of the target is a world-class problem in the field of beam measurement.

Images