Large dynamic fast neutron yield measurement system and realization method thereof

Abstract

The invention discloses a large dynamic fast neutron yield measurement system which comprises a micrometer capillary scintillator array, an optical fiber cone, an ICCD and an image acquisition and processing system. A capillary in the micrometer capillary scintillator array is filled with a liquid scintillator to realize the sequence converting from a neutron signal to a proton signal to a visible light signal, and the visible light signal is transmitted to the optical fiber cone. The optical fiber cone is used to transmit the visible light signal to the ICCD, so that the micrometer capillary scintillator array matches the ICCD in pixel. The ICCD is used for recording the visible light signal. The image acquisition and processing system is used to acquire the visible light signal on the ICCD, and extract a proton track. According to the invention, the problem that large dynamic diagnosis of the same azimuth is difficultly acquired and the anti-gamma radiation noise capability is weak in the prior art are solved; the range ability is more than 104; and the system is at least 2 orders higher than a conventional neutron yield detector.

Description

technical field [0001] The invention relates to the field of fast neutron detection in nuclear energy science and technology, in particular to a large dynamic fast neutron yield measurement system and its realization method. Background technique [0002] In inertial confinement fusion research, fast neutron yield is one of the most critical parameters. In the research of laser neutron sources, it is also necessary to accurately measure the neutron yield to explore ways to increase the neutron yield. The commonly used detectors for measuring fast neutron yield include BF 3 detectors and scintillator detectors. BF 3 The principle of the detector is the secondary ion α generated by the interaction between neutrons and boron, and then amplified by gas to output electrical signals. The detection principle of the scintillator detector is that neutrons collide with the scintillator to produce recoil protons, and the recoil protons interact with the luminescent material in the s...

AI Technical Summary

Problems solved by technology

Due to the large uncertainty factor of the experiment, if the prediction is not accurate, the neutron yield will exceed the measurement range of our detector, which will lead to the failure of the experiment. In order to reduce this risk, a larger dynamic range will be required. Neutron Yield Measurements

However, due to the relatively small dynamic range of neutron detectors commonly used at present, in experiments, we often need to improve the dynamic range by combining multiple neutron detectors of different types, but such a diagnostic design will have a very Obvious shortcomings, namely: it is difficult to obtain a large dynamic diagnosis in the same direction, and the detector's ability to resist gamma radiation noise is relatively weak

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