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Neutron counting method used in strong pulse X-ray environment and counter

A counting method, X-ray technology, applied in radiation measurement, neutron radiation measurement, instruments, etc., can solve the problem of inaccurate neutron counting and achieve the effect of improving accuracy

Active Publication Date: 2020-07-14
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing neutron counters are inaccurate in counting neutrons under the irradiation of strong pulsed X-rays

Method used

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  • Neutron counting method used in strong pulse X-ray environment and counter
  • Neutron counting method used in strong pulse X-ray environment and counter
  • Neutron counting method used in strong pulse X-ray environment and counter

Examples

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Embodiment 1

[0037] Such as Figure 1 to Figure 4 As shown, the present invention provides a neutron counting method used in a strong pulsed X-ray environment, including: a moderator 1, a proportional counter tube 2, an isolation resistor R5, an isolation capacitor C3, an amplifier circuit 5, a cable 3 and a pulse power supply Circuit 4.

[0038] S10: pulse power supply circuit 4, used to generate pulse voltage based on the pulse signal generated by the pulse generator, and send it to the proportional counter tube 2 through the cable 3 and the isolation resistor R5.

[0039] Specifically, the isolation resistor R5 is a resistor with a resistance value of 10k-100k ohms, one end of which is connected to the anode of the proportional counter tube 2, and the other end is connected to the pulse power supply circuit 4 through the cable 3, and its function is to make the pulse power supply circuit 4 be Proportional counter tube 2 applies pulse voltage, and at the same time isolates the count pul...

Embodiment 2

[0066] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that a neutron counter based on the above-mentioned neutron counting method used in a strong pulsed X-ray environment, the neutron counter includes:

[0067] The proportional counter tube 2 is set in the moderator 1, the cathode of the proportional counter tube 2 is connected to the moderator 1, and the anode of the proportional counter tube 2 is respectively connected to the isolation resistor R5 and the isolation capacitor C3; the isolation resistor R5 is connected to the pulse by the cable 3 The power supply circuit 4 is connected, and the isolation capacitor C3 is connected with the amplifier circuit 5 .

[0068] Further, the pulse power supply end is connected to one end of the first resistor R1, the other end of the first resistor R1 is respectively connected to one end of the first capacitor C1 and the first end of the switch K1, the other end of the first capacitor C1 is groun...

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Abstract

The invention discloses a neutron counting method used in a strong pulse X-ray environment and a counter. The neutron counting method comprises a moderator, a proportional counting tube, an isolationresistor, an isolation capacitor, an amplification circuit, a cable and a pulse power supply circuit. The pulse power supply circuit is used for generating pulse voltage based on a pulse signal generated by the pulse generator and sending the pulse voltage to the proportional counting tube through a cable and an isolation resistor; the proportional counting tube is used for generating an originalcounting pulse signal based on the pulse voltage and sending the original counting pulse signal to the amplification circuit through the isolation capacitor, and the original counting pulse signal carries a bias signal; the amplification circuit is used for isolating bias signals carried by original counting pulse signals, effective counting pulse signals are obtained and sent to an oscilloscope so as to avoid the time interval from the time when the proportional counting tube is irradiated by pulse X-rays to generate electrons to the time before the electrons are absorbed by gas, so that theelectrons generated by X-ray irradiation ionization are not increased due to electric field acceleration, and the neutron counting accuracy is improved.

Description

technical field [0001] The invention relates to the field of pulse neutron measurement, in particular to a neutron counting method and a counter used in a strong pulse X-ray environment. Background technique [0002] Neutron counters are also called long neutron counters. Traditional long neutron counters use hydrogen-containing materials to slow down neutrons, and then use a proportional counter tube with a constant voltage and an amplifier connected to it to generate a corresponding neutron count. The electrical pulse signal completes the counting of neutrons. Since the proportional counter tube in the neutron counter is actually a high-gain electronic amplifier, when the proportional counter tube is irradiated by strong pulsed X-rays, the electrons generated by the ionization of the X-ray radiation move toward the anode and bombard gas molecules. The generated secondary electrons quickly move toward the anode and are absorbed under the action of the electric field in the...

Claims

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Application Information

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IPC IPC(8): G01T3/00
CPCG01T3/006
Inventor 王昆仑张思群任晓东
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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