Microchannel plate type fast neutron position gas detector and detection method thereof

A technology of gas detector and micro-channel plate, which is applied in nuclear technology application and non-destructive testing field, can solve the problem of long signal collection time and achieve the effect of low cost and high detection efficiency

Inactive Publication Date: 2016-09-07
章先鸣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since positive ions typically drift three orders of magnitude slower than electrons, resulting in long signal collection times, they do not work well at high count rates

Method used

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  • Microchannel plate type fast neutron position gas detector and detection method thereof
  • Microchannel plate type fast neutron position gas detector and detection method thereof
  • Microchannel plate type fast neutron position gas detector and detection method thereof

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Embodiment Construction

[0041] figure 1 It is a schematic principle diagram of a microchannel plate type fast neutron position gas detector according to a preferred embodiment of the present invention. Such as figure 1As shown, the microchannel plate type fast neutron position gas detector includes a gas chamber 16 , a drift cathode 10 , a microchannel structural plate 11 , a gas electron multiplier 14 , a high voltage divider circuit 12 , a readout PCB 15 , and a working gas 13 .

[0042] Specifically, the gas chamber 16 provides an airtight working environment for the detector, and acts as a shield to prevent it from being disturbed by external electric fields. At the same time, the positions of the drift cathode 10, the microchannel structural plate 11, the gas electron multiplier 14, and the readout PCB 15 are fixed and the precise positional relationship among them is ensured. The gas chamber 16 can be made of any material suitable for providing a sealed environment and shielding the external ...

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Abstract

The invention provides a microchannel plate type fast neutron position gas detector and a detection method thereof, and relates to the field of nuclear technology applications. The detector comprises a gas chamber with an intake hole and an exhaust hole, a drift cathode, a microchannel structure plate, a gas electron multiplier, a high voltage dividing circuit, a read out PCB and a working gas. The drift cathode is arranged in the gas chamber with the intake hole and the exhaust hole. The microchannel structure plate is arranged below the drift cathode. The gas electron multiplier is arranged below the microchannel structure plate. The read out PCB is arranged below the gas electron multiplier. The working gas fills the whole chamber and a microchannel in the microchannel structure plate. The microchannel plate type fast neutron position gas detector provided by the invention can normally work at a high counting rate, and can be used for large part non-destructive detection and container scanning security check.

Description

technical field [0001] The present invention generally relates to the application field of nuclear technology, especially the field of non-destructive testing. More specifically, the present invention relates to a microchannel plate type fast neutron position gas detector and a detection method thereof. Background technique [0002] Compared with X-rays, neutrons have stronger penetrating ability, which makes neutron imaging technology have broader application prospects in the field of non-destructive testing of large workpieces, among which fast neutrons have stronger penetrating ability than thermal neutrons , is an ideal probe for container scanning and flaw detection of large workpieces. [0003] For polyethylene moderator plus 3 The conventional fast neutron detection method of He absorbing medium is due to 3 He's running out of supplies and costs are skyrocketing. Moreover, the position resolution obtained based on this technical means of first slowing down fast ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T3/00
CPCG01T3/00
Inventor 章先鸣
Owner 章先鸣
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