Neutron energy spectrum measuring device and Bonner sphere spectrometer system

A measuring device and technology for neutron energy, which are applied in the field of neutron energy spectrum measuring device and Banner sphere spectrometer system, can solve problems such as inability to meet measurement requirements, achieve simple and convenient data processing, simple electronics and data acquisition system , the effect of counting accurate

Active Publication Date: 2019-05-24
PEKING UNIV
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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 m

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  • Neutron energy spectrum measuring device and Bonner sphere spectrometer system
  • Neutron energy spectrum measuring device and Bonner sphere spectrometer system
  • Neutron energy spectrum measuring device and Bonner sphere spectrometer system

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Embodiment Construction

[0037] As mentioned in the background technology section, the Banner sphere spectrometer in the prior art has deficiencies in the measurement of high-throughput neutron spectroscopy and cannot meet the measurement requirements.

[0038] According to the different thermal neutron counters used in the prior art, the Bonner sphere spectrometer can be divided into two types: active type and passive type. The commonly used active Bonner sphere thermal neutron counter is 3 He, BF 3 proportional counter and 6 LiI scintillator has high detection efficiency for thermal neutrons and is mostly used in weak neutron fields (neutron fluence rate5 cm -2 the s -1 ) neutron spectrum measurement, the experimental data can be obtained online. Typical thermal neutron counters of passive Bonner sphere spectrometers are activated foils such as gold, dysprosium, and indium, which are mostly used for neutron spectrum measurements in strong neutron fields, and can only obtain cumulative counts wit...

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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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Application Information

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IPC IPC(8): G01T3/00
Inventor 胡志猛葛理建张一镆孙嘉琪杜腾飞彭星宇樊铁栓
Owner PEKING UNIV
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