Neutron energy spectrum measuring device and Bonner sphere spectrometer system

Abstract

The invention provides a neutron energy spectrum measuring device and a Bonner sphere spectrometer system. A diamond detector is adopted as a thermal neutron counter, the advantage that the diamond detector is low in thermal neutron detection efficiency and quick in response is utilized, data real-time recording can be realized, the problem of detector counting saturation in a strong neutron fieldis avoided, and the device has the advantages of a real-time data recording function that existing active Bonner sphere spectrometers have and an anti-saturation function in a high-throughput neutronfield. A gap is formed between a diamond sensitive unit and a 6LiF neutron converter, so that alpha and tritium particles obtained by thermal neutrons and 6Li reaction can be separated, and tritium particle counting is more accurate. In addition, only one diamond detector is arranged in each spherical moderator, so that electronics and a data collection system are enabled to become simple and bemore convenient for operation, and subsequent data processing is made simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of neutron measurement, and in particular relates to a neutron energy spectrum measurement device and a Bonner sphere spectrometer system. Background technique [0002] Tokamak is a magnetic confinement nuclear fusion device, which is considered to be one of the most possible ways to realize artificial controlled nuclear fusion. There is a neutron radiation field around the tokamak device operating with deuterium fuel, the energy range is roughly 0.0253eV-2.5MeV, and the energy spans 8 orders of magnitude. In addition, the structure and materials of the device are complex, and there are a large number of other instruments and materials around the device. The neutron radiation field has a complex space and energy distribution, which makes it difficult to measure the neutron energy spectrum around the tokamak. [0003] The Banner sphere spectrometer system has an extremely wide energy coverage (up to 10 -9 M...

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Problems solved by technology

[0005] However, the neutron yield of large and medium-sized tokamaks can reach 10 14 the s -1 , the neutron fluence rate around the device can reach 10 8 cm -2 the s -1 As mentioned above, the Banner sphere spectrometer in the prior art has deficiencies in such high-throughput neutron spectrum measurement and cannot meet the measurement requirements

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