Neutron detector and neutron detection method
A technology of a neutron detector and a detection method, which is applied to the measurement of semiconductor detectors, the measurement of neutron radiation, instruments, etc., can solve the problems of poor time resolution and limited counting ability, and achieve high conversion efficiency and counting rate. High, low price effect
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[0028] Example one
[0029] figure 1 It is a schematic diagram of the structure of the neutron detector provided in the first embodiment of the present invention. Such as figure 1 As shown, the neutron detector of this embodiment includes a drift electrode 10 for providing a drift electric field, a boron-coated GEM structure 11 for converting incident neutrons, and a primary electron generated after neutron conversion. The GEM structure 12 for gas amplification and the readout electrode 13 for reading the electronic signal after gas amplification. The electric field between the drift electrode 10 and the boron-coated GEM structure 11 is called the drift electric field. The electric field between the GEM structure 12 and the readout electrode 13 is an ordinary electric field, or electric field for short.
[0030] Such as figure 1 As shown, in this embodiment, the drift electrode 10, the boron-coated GEM structure 11, the GEM structure 12, and the readout electrode 13 are arranged ...
Example Embodiment
[0041] Example two
[0042] First of all, it needs to be explained that the detection efficiency is the most important performance index of a neutron detector. For the GEM-based neutron detector in the above embodiment of the present invention, the neutrons are captured by boron to produce 7 Li, α ion, has high energy (~1MeV), and the detection efficiency is basically 100%. Therefore, the neutron detection efficiency can be roughly regarded as the conversion efficiency of boron to neutrons. Due to the Coulomb interaction, the single layer is pure 10 The maximum conversion efficiency of B to thermal neutrons is about 5%. Such as image 3 What is shown is a schematic diagram of the relationship between the neutron conversion efficiency and the number of layers in the embodiment of the present invention. Such as image 3 As shown, the intensity of the neutron beam passing through the conversion layer (that is, the first boron-coated GEM film 14) decays exponentially with the increa...
Example Embodiment
[0045] Example three
[0046] Image 6 It is a schematic diagram of the structure of the neutron detector provided in the third embodiment of the present invention. On the basis of the first or second embodiment above, the neutron detector of this embodiment may also include a method for processing the amplified electronic signal read by the readout electrode, and calculating the hit position and the neutron Data processing equipment 16 hitting time. The data processing device 16 is connected to the read electrode 13. Such as figure 2 Shown in the above figure 1 On the basis of the illustrated embodiment, a data processing device 16 is added as an example to introduce the technical solution of the present invention. The data processing device 16 may also use existing related hardware to integrate its functions. Specifically, the principle of implementing neutron detection by the neutron detector of this embodiment is the same as that of the foregoing embodiment. For details, ...
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