Multilayer spherical moderator container and neutron energy spectrum real-time measuring device

Abstract

The invention relates to a multilayer spherical moderator container. A plurality of concentric hollow spherical shells having different inner diameters are combined with one another layer by layer from inside to outside so as to form the multi-layer spherical moderator container; the number i of the hollow spherical shells can be 1, 2, 3, 4, ..., and n; and if i is equal to 2, 3, 4, ..., n, a space between the i-th hollow spherical shell and the (i-1)-th hollow sphere spherical is communicated with an external liquid moderator loop through a pipeline corresponding to the space. The invention also provides a neutron energy spectrum real-time measuring device. The device includes a spherical neutron detector, a back-end nuclear electronic processing circuit, a multilayer spherical moderatorcontainer and a liquid moderator loop; the multilayer spherical moderator container wraps the spherical neutron detector; and the liquid moderator loop can control a liquid moderator in real time so as to make the liquid moderator fill or discharge from a space between an i-th hollow spherical shell and a (i-1)-th hollow sphere spherical shell provided that the number i of the hollow spherical shells is set to be 2, 3, 4, ..., and n, so that neutrons can be moderated, and can be easily detected by the spherical neutron detector. The neutron energy spectrum real-time measuring device of the invention can measure the energy spectrum of the neutrons in real time, and has the advantages of low cost and convenient use.

Description

technical field [0001] The invention relates to a multilayer spherical moderator container and a neutron energy spectrum real-time measurement device, belonging to the technical field of neutron energy spectrum measurement. Background technique [0002] At present, there are few real-time neutron spectrum measurement systems that can be applied to places and environments at home and abroad, and multi-sphere neutron spectrometers are generally used. A multisphere neutron spectrometer, also known as a Bonner spectrometer, consists of multiple spherical detectors with different diameters. The outside of the spherical detector is a polyethylene moderator, and there is a neutron detector at the center of the sphere. Spherical detectors with different diameters correspond to different neutron energy segments. The Bonner spectrometer uses multiple spherical detectors, which requires multiple neutron detectors and the corresponding back-end nuclear electronics circuits, and its co...

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Problems solved by technology

However, when using this device to measure the neutron energy spectrum, it is necessary to manually install or remove the spherical polyethylene moderator step by step, and select the appropriat...

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