High-precision fusion neutron energy spectrum measuring device and method

Abstract

The invention relates to a high-precision fusion neutron energy spectrum measuring device and method. The invention aims to solve problems that an existing fusion neutron energy spectrum measuring device and method are only suitable for diagnosis under high neutron yield if a recoil proton magnetic analysis method is adopted, an initial time waveform and a response waveform are difficult to obtain simultaneously and effectively by using the same detection system if a neutron time-of-flight method is adopted, and an initial time waveform and a response waveform are difficult to obtain simultaneously and effectively if different detection systems are adopted; time difference is additionally introduced, so precision of solving flight time broadening, Doppler energy spectrum broadening, fusion plasma temperature characteristics and the like is reduced. The measuring device comprises a hydrogen-rich perovskite scintillator, a photoelectric conversion device, a power supply, an oscilloscope and a computer, a photocathode of the photoelectric conversion device faces the hydrogen-rich perovskite scintillator; an output end of the photoelectric conversion device is connected with an input end of the oscilloscope, and an output end of the oscilloscope is connected with an input end of the computer. The measurement method is carried out by using the high-precision fusion neutron energy spectrum measurement device.

Description

technical field [0001] The invention relates to a pulse deuterium-tritium (DT) fusion reaction energy spectrum measuring device and method in radiation detection, in particular to a high-precision fusion neutron energy spectrum measuring device and method. Background technique [0002] The measurement of neutron energy spectrum plays an extremely important role in the plasma diagnosis of pulsed deuterium-tritium (DT) fusion reaction. Neutron spectroscopy can be used to obtain key information such as the temperature of fusion plasma. Usually, the diagnosis of fusion plasma requires extremely high accuracy of neutron spectroscopy measurement. At present, the most commonly used neutron spectrum measurement methods on fusion devices are recoil proton magnetic analysis and neutron time-of-flight. The former has a large system and is only suitable for plasma diagnosis under high neutron yield; the latter requires effective acquisition The time characteristics of the initial neutr...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the existing fusion neutron energy spectrum measurement device and method, if the recoil proton magnetic analysis method is used, it is only suitable for diagnosis under the high neutron yield, if the neutron time-of-flight method is used, it is still difficult to use the same The detection system can effectively obtain the initial time waveform and the response waveform at the same time. If different detection systems are used, an additional time difference will be introduced, which will cause technical problems such as the accuracy of solving time-of-flight broadening, spectral Doppler broadening and fusion plasma temperature characteristics. Provide a high-precision fusion neutron energy spectrum measurement device and method

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