Water injection and drainage full-automatic multisphere neutron spectrometer and measurement method

Abstract

The present invention discloses a water injection and drainage full-automatic multisphere neutron spectrometer and a measurement method. A system comprises a water injection and drainage system, multiple layers of annular lead glass spherical shells, a spherical neutron detector and an analyzing and processing system. According to a neutron measurement place, the water injection and drainage full-automatic multisphere neutron spectrometer is installed, at measurement, the water injection and drainage system injects the water in the multiple layers of annular lead glass spherical shells orderly, thereby achieving the purpose of changing the thickness of a neutron moderator, and measuring the neutrons of different energy in an environment. According to the present invention, the water injection and drainage system carries out the full-automatic control on the different parameters of a single spherical detector, thereby achieving the multisphere detection purpose, solving the manufacturing complexity of a plurality of detection systems in a conventional multisphere system, reducing the manufacturing cost, at the same time, effectively avoiding the problems that the detectors in the conventional multisphere system influence each other and are inconsistent, and the overall carrying of the plurality of detectors is tedious.

Description

technical field [0001] The invention relates to a neutron spectrometer and a measuring method, in particular to a fully automatic multi-sphere neutron spectrometer for water injection and drainage and a measuring method. Background technique [0002] The space radiation environment is complex, neutrons spread all over the space, and the energy ranges from a few MeV to tens of MeV, and most organs of the human body are composed of low atomic number substances, so after the human body is irradiated by neutrons, the key organs Can suffer severe damage, induce tumors and even lead to death. With the development of the aerospace industry in various countries, more and more attention has been paid to the radiation damage of space environment radiation to spacecraft and its components, and to astronauts. Only by measuring the space neutron energy spectrum and taking effective protective measures can the damage be minimized . [0003] The spherical neutron spectrometer was propose...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the conventional multi-sphere neutron spectrometer has low sensitivity to neutrons above 20 MeV and cannot measure the neutron spectrum of tens of MeV or even hundreds of MeV in space, and proposes a neutron spectrometer for neutrons above 10 MeV. Fully automatic multi-sphere neutron spectrometer for water injection and drainage for particle energy spectrum measurement

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