Spallation neutron target with mixed cooling flow channel

Abstract

The invention provides a spallation neutron target with a mixed cooling flow channel. The spallation neutron target has a serial cooling flow channel and a parallel cooling flow channel communicated with each other at the same time is provided, aims at thermal deposition of a target body, and takes an internal cooling flow channel as an optimization object. The spallation neutron target comprises a target container and a target body installed in the target container, and a target window is arranged on the front end face, right facing the proton beam bombardment direction, of the target container; the target body is formed by fixedly connecting a plurality of target piece single bodies in a stacked mode, a single serial cooling flow channel is formed by gaps between the target pieces close to the target window direction and the upper inner wall and the lower inner wall of the target container, a parallel cooling flow channel is formed by gaps between connecting faces between every two adjacent connected target pieces far away from the target window direction, and a serial cooling flow channel and the parallel cooling flow channel are communicated with each other. The overall flow of a working medium in the overall target structure is low, high-flow-rate heat dissipation is achieved in a high-heat-flow area of the target body through serial flow, flow resistance is reduced in a low-heat-flow area through parallel flow, efficient cooling and stable flowing are achieved, and therefore the service life of the target body is prolonged.

Description

technical field [0001] The invention relates to the technical field of spallation neutron targets, in particular to a spallation neutron target with mixed cooling channels in which interconnected serial cooling channels and parallel cooling channels exist. Background technique [0002] The mechanism of neutron generation is the spallation reaction of atomic nuclei, and the spallation neutron source is a large-scale scientific experimental device driven by an accelerator to generate intense neutron beams. At present, countries with large spallation source devices in the world include the United States, the United Kingdom, Switzerland, Japan, China and Sweden, and other small and medium-sized neutron sources are also being designed and constructed. [0003] The spallation neutron source uses the high-energy protons produced by the accelerator to bombard the heavy metal target to cause the nuclear spallation to provide high-flux pulsed neutrons, and uses the neutrons generated ...

AI Technical Summary

Problems solved by technology

During the operation of the device, more than 50% of the proton beam power will be deposited in the target body, so in order to ensure the cooling effect of each target piece, more cooling fluid is required inside the target body, and multiple parallel cooling fluids formed inside the target body The flow channel also has a certain influence on the flow distribution and flow stability, which in turn endangers the safe operation of the target.

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