A device and method for eliminating interference of long-gap discharge high-energy X-rays in a strong electromagnetic environment

Abstract

This invention discloses a measurement device and method for eliminating high-energy X-ray interference in long-gap discharges under strong electromagnetic environments, belonging to the field of long-gap discharge technology. The device comprises a discharge testing section and a measurement interference elimination section. The discharge testing section includes: an impulse voltage generator, a voltage divider, a rod electrode, a plate electrode, an electron beam, and an oscilloscope. The measurement interference elimination section includes: an aluminum plate, a scintillator probe, a photomultiplier tube, a signal amplifier, high-transmittance glass, a second photomultiplier tube, a second signal amplifier, another oscilloscope, and a computer server. The method of this invention is relatively simple, easy to conduct various long-gap discharge experiments, can improve the accuracy of high-energy X-ray discharge measurements, and contributes to promoting fundamental theoretical research on long-gap discharges.

Description

Technical Field

[0001] The invention belongs to the technical field of long-gap discharge high-energy radiation X-ray measurement, and in particular relates to a long-gap discharge high-energy X-ray interference elimination measurement device and method under a strong electromagnetic environment. Background Art

[0002] Long gap discharge is an experimental method for studying the regular characteristics of lightning impulse overvoltage and power frequency overvoltage discharge characteristics. However, long gap discharge has the characteristics of short discharge time, high discharge voltage, strong electromagnetic environment, acoustic, optical, thermal and other physical parameters. In particular, high-energy X-rays appear during the discharge process, and the physical process and mechanism of discharge are very complex. When conducting long gap discharge tests in a strong electromagnetic environment, it is necessary to eliminate electromagnetic environment interference when measuring high-energy X-rays. Therefore, it is necessary to invent a new device to eliminate and accurately measure the high-energy X-rays and the accompanying interference generated during the discharge process under long gaps. Therefore, the invention proposes this device to solve the above problems.

[0003] Chinese invention patent CN 106990333A proposes a device for conducting long gap discharge tests in a low pressure environment, which is mainly composed of a discharge test chamber, a vacuum device, and a high-speed observation platform. The device is relatively complex, the test cost is high, and because of the long gap discharge, the device is large in size and requires high insulation matching devices. The detection device is a high-speed camera, which cannot eliminate electromagnetic interference for high-energy X-rays to achieve accurate measurement.

[0004] At present, single scintillator or array is mostly used to detect X-rays in the field of X-ray detection. For example, the X-ray detector array composed of scintillator groups in Chinese invention patent CN 103959098A can well reflect the temporal and spatial distribution of X-rays, but the packaging structure of the device will absorb X-rays. In order to avoid the influence of X-rays on the circuit, this will cause deviations in the experimental results of X-ray measurement, and the array structure has a high cost. Ordinary X-ray detection devices cannot meet the requirements of observing X-rays generated at different positions of long gap discharge. Summary of the invention

[0005] In view of the above problems, the present invention proposes a device and method for eliminating interference measurement of long-gap discharge high-energy X-rays in a strong electromagnetic environment, which specifically adopts the following technical solutions:

[0006] A long gap discharge high energy X-ray interference elimination measurement device in a strong electromagnetic environment, comprising a discharge test part and a measurement interference elimination part;

[0007] The discharge test part includes an impulse voltage generator, a voltage divider, a rod electrode, a plate electrode, an electron beam current generator and an oscilloscope. The high-voltage end of the impulse voltage generator is connected to the high-voltage end of the voltage divider, and the ground end of the impulse voltage generator and the ground end of the voltage divider are connected to the earth. The rod electrode is connected in parallel to the high-voltage end arm of the voltage divider. When the impulse voltage generator is charged, a long gap discharge test in the laboratory is realized. The electron beam current generator is placed under the rod electrode, and its signal output end is connected to the oscilloscope. The plate electrode is opposite to the rod electrode and is arranged on the electron beam current generator. The oscilloscope is connected to the measurement output end of the voltage divider. After the long gap discharge, the plate electrode escapes the signal output end of the electron beam current generator.

[0008] The measurement interference elimination part includes an aluminum plate, a scintillator, a photomultiplier tube 1, a signal amplifier 1, a high-transmittance glass, a photomultiplier tube 2, a signal amplifier 2, an oscilloscope 2, and a computer server; the aluminum plate is placed between the scintillator, the high-transmittance glass and the long-gap discharge channel to isolate the visible light generated during the long-gap discharge and ensure that the high-energy X-rays pass through the aluminum plate; the thickness of the aluminum plate is 5-10mm; the scintillator generates photons under the action of high-energy X-rays; the photomultiplier tube 1 is connected between the scintillator and the signal amplifier 1, and is converted into an optical signal through photon excitation; the signal amplifier 1 receives the optical signal emitted by the photomultiplier tube 1 and amplifies the optical signal; the high-transmittance glass is connected to The aluminum plate and the photomultiplier tube 1 allow other interferences in the long gap discharge process under a strong electromagnetic environment to pass through; the photomultiplier tube 2 is used to keep the photomultiplier tube 1 in the same external interference environment and generate an interference signal; the signal amplifier 2 receives the interference signal emitted by the photomultiplier tube 2 and maintains the same amplification gain for the interference signal; the oscilloscope 2 is respectively connected to the signal trigger end of the oscilloscope 1, the output end of the signal amplifier 1 and the output end of the signal amplifier 2, and simultaneously measures and performs difference processing on the optical signal emitted by the signal amplifier 1 and the interference signal emitted by the signal amplifier 2; the computer server is connected to the output end of the oscilloscope 2 to display and calculate and analyze the measured and processed signals.

[0009] Furthermore, the impulse voltage generator is a common high-voltage discharge device.

[0010] Furthermore, the rod electrode is a needle-plate discharge or needle-needle discharge structure.

[0011] The present invention also provides a measurement method for eliminating interference of a measurement device using long gap discharge high energy X-rays in a strong electromagnetic environment, comprising the following steps:

[0012] The impulse voltage generator is charged, and then discharge occurs through the rod electrode. The impulse voltage generator realizes discharge with multiple voltage waveforms, and high-energy electrons and X-rays are generated during the discharge process. The generated high-energy electrons move downward, are collected by the electron beam current device, and generate an input voltage signal for oscilloscope one. At this time, the trigger end of oscilloscope one generates a trigger signal to trigger oscilloscope two. At the same time, the high-energy X-rays generated during the discharge process diverge into space, pass through the aluminum plate, and are detected by the scintillator to stimulate them to generate photons. The photons are converted into optical signals through photomultiplier tube one, and are amplified through signal amplifier one at this time. The optical signal is input to the input end of oscilloscope two. During the long gap discharge process, it is subject to strong electromagnetic interference. The interference will pass through high-transmittance glass, pass through photomultiplier tube two and signal amplifier two under the same gain condition, and then be input to the other end of oscilloscope two. Oscilloscope two performs difference processing on the two signals, and then inputs the processed signals to the computer server to complete the measurement of long gap discharge high-energy X-ray interference elimination.

[0013] Beneficial effects:

[0014] The present invention proposes a device and method for eliminating interference measurement of high-energy X-rays in long-gap discharge under strong electromagnetic environment. The dual-channel measurement method is adopted to eliminate the interference of the strong electromagnetic environment when the traditional single-channel measurement method is adopted, and the measurement of high-energy X-ray signals has the advantage of high accuracy, thereby improving the ability to capture high-energy X-ray signals during long-gap discharge experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a long gap discharge high energy X-ray interference elimination measurement device in a strong electromagnetic environment according to the present invention;

[0016] Figure 2 This is a flow chart of a measurement method for eliminating interference of high-energy X-rays caused by long-gap discharge in a strong electromagnetic environment according to the present invention.

[0017] Among them: 1- impulse voltage generator, 2- voltage divider, 3- rod electrode, 4- electron beam current device, 5- oscilloscope one, 6- aluminum plate, 7- scintillator, 8- photomultiplier tube one, 9- signal amplifier one, 10- high-transmittance glass, 11- photomultiplier tube two, 12- signal amplifier two, 13- oscilloscope two, 14- computer server, 15- plate electrode. DETAILED DESCRIPTION

[0018] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0019] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0020] The present invention provides a high-energy X-ray interference elimination measurement device under long gap discharge in a strong electromagnetic environment, such as Figure 1 As shown, it includes: a discharge test part and a measurement interference elimination part.

[0021] The discharge test part includes an impulse voltage generator 1, a voltage divider 2, a rod electrode 3, a plate electrode 15, an electron beam current generator 4 and an oscilloscope 5; the high-voltage end of the impulse voltage generator 1 is connected to the high-voltage end of the voltage divider 2, and the grounding end of the impulse voltage generator 1 and the grounding end of the voltage divider 2 are connected to the earth; the rod electrode 3 is connected in parallel to the high-voltage end arm of the voltage divider 2, and when the impulse voltage generator 1 is charged, a laboratory long gap discharge test can be realized; the plate electrode 15 is opposite to the rod electrode 3 and is arranged on the electron beam current generator 4; the electron beam current generator 4 is placed below the rod electrode 3, and its signal output end is connected to the oscilloscope 5; the oscilloscope 5 is connected to the measurement output end of the voltage divider 2, and after the long gap discharge, the plate electrode 15 escapes the signal output end of the electron beam current generator 4.

[0022] The measurement interference elimination part includes an aluminum plate 6, a scintillator 7, a photomultiplier tube 8, a signal amplifier 9, a high-transmittance glass 10, a photomultiplier tube 11, a signal amplifier 12, an oscilloscope 13 and a computer server 14. The aluminum plate 6 is placed between the scintillator 7 and the high-transmittance glass 10 and the long-gap discharge channel to isolate the visible light generated by the long-gap discharge and ensure that high-energy X-rays can pass through the aluminum plate 6. The thickness is generally 5mm-10mm; the scintillator 7 generates photons under the action of high-energy X-rays, and the photons can be converted into optical signals through the photomultiplier tube 8; the photomultiplier tube 8 is connected between the scintillator 7 and the signal amplifier 9, and is converted into an optical signal through photon excitation; the signal amplifier 9 receives the optical signal emitted by the photomultiplier tube 8 and amplifies the optical signal; the high-transmittance glass 10 is connected between the aluminum plate 6 and the photomultiplier tube 11, so that the long-gap discharge channel can be effectively eliminated in a strong electromagnetic environment. Other interferences during the gap discharge process are transmitted; the photomultiplier tube 11 is used to maintain the same external interference environment as the photomultiplier tube 8 to generate an interference signal; the signal amplifier 12 receives the interference signal emitted by the photomultiplier tube 11 and maintains the same amplification gain for the interference signal; the oscilloscope 13 is respectively connected to the signal trigger end of the oscilloscope 5, the output end of the signal amplifier 9 and the output end of the signal amplifier 12, and the optical signal emitted by the signal amplifier 9 and the interference signal emitted by the signal amplifier 12 are simultaneously measured and differentially processed; the computing server 14 is connected to the output end of the oscilloscope 13 to display and calculate and analyze the measured and processed signals.

[0023] A high-energy X-ray interference elimination measurement method under long gap discharge in a strong electromagnetic environment of the present invention comprises the following steps:

[0024] The impulse voltage generator 1 is charged, and then discharge occurs through the rod electrode 3. The impulse voltage generator 1 can realize discharge with a variety of voltage waveforms. High-energy electrons and X-rays are generated during the discharge process. The generated high-energy electrons move downward, are collected by the electron beam current collector 4, and generate an input voltage signal for the oscilloscope 5. At this time, the trigger end of the oscilloscope 5 generates a trigger signal to trigger the oscilloscope 2 13. At the same time, the high-energy X-rays generated during the discharge process diverge into space, pass through the aluminum plate 6, and are detected by the scintillator 7 to stimulate them to generate photons. The photons are converted into light signals through the photomultiplier tube 8, and are amplified by the signal amplifier 9 at this time. The light signal is input to the input end of the oscilloscope 2 13. During the long gap discharge process, it is subject to strong electromagnetic interference. The interference will pass through the high-transmittance glass 10, through the photomultiplier tube 11 and the signal amplifier 12 under the same gain condition, and then input into the other end of the oscilloscope 13. The oscilloscope 13 performs difference processing on the two signals, and then inputs the processed signal into the computer server 14 to complete the measurement of long gap discharge high-energy X-ray interference elimination.

[0025] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for eliminating interference of high-energy X-rays with long-gap discharge in a strong electromagnetic environment. Features: Including discharge test part and measurement interference elimination part; The discharge test part includes an impulse voltage generator, a voltage divider, a rod electrode, a plate electrode, an electron beam current generator and an oscilloscope. The high-voltage end of the impulse voltage generator is connected to the high-voltage end of the voltage divider, and the ground end of the impulse voltage generator and the ground end of the voltage divider are connected to the earth. The rod electrode is connected in parallel to the high-voltage end arm of the voltage divider. When the impulse voltage generator is charged, a long gap discharge test in the laboratory is realized. The electron beam current generator is placed under the rod electrode, and its signal output end is connected to the oscilloscope. The plate electrode is opposite to the rod electrode and is arranged on the electron beam current generator. The oscilloscope is connected to the measurement output end of the voltage divider. After the long gap discharge, the plate electrode escapes the signal output end of the electron beam current generator. The measurement interference elimination part includes an aluminum plate, a scintillator, a photomultiplier tube 1, a signal amplifier 1, a high-transmittance glass, a photomultiplier tube 2, a signal amplifier 2, an oscilloscope 2, and a computer server; the aluminum plate is placed between the scintillator, the high-transmittance glass and the long-gap discharge channel to isolate the visible light generated during the long-gap discharge and ensure that the high-energy X-rays pass through the aluminum plate; the thickness of the aluminum plate is 5-10mm; the scintillator generates photons under the action of high-energy X-rays; the photomultiplier tube 1 is connected between the scintillator and the signal amplifier 1, and is converted into an optical signal through photon excitation; the signal amplifier 1 receives the optical signal emitted by the photomultiplier tube 1 and amplifies the optical signal; the high-transmittance glass is connected to The aluminum plate and the photomultiplier tube 1 allow other interferences in the long gap discharge process under a strong electromagnetic environment to pass through; the photomultiplier tube 2 is used to keep the photomultiplier tube 1 in the same external interference environment and generate an interference signal; the signal amplifier 2 receives the interference signal emitted by the photomultiplier tube 2 and maintains the same amplification gain for the interference signal; the oscilloscope 2 is respectively connected to the signal trigger end of the oscilloscope 1, the output end of the signal amplifier 1 and the output end of the signal amplifier 2, and simultaneously measures and performs difference processing on the optical signal emitted by the signal amplifier 1 and the interference signal emitted by the signal amplifier 2; the computer server is connected to the output end of the oscilloscope 2 to display and calculate and analyze the measured and processed signals; The impulse voltage generator is charged, and then discharge occurs through the rod electrode. The impulse voltage generator realizes discharge with multiple voltage waveforms, and high-energy electrons and X-rays are generated during the discharge process. The generated high-energy electrons move downward, are collected by the electron beam current device, and generate an input voltage signal for oscilloscope one. At this time, the trigger end of oscilloscope one generates a trigger signal to trigger oscilloscope two. At the same time, the high-energy X-rays generated during the discharge process diverge into space, pass through the aluminum plate, and are detected by the scintillator to stimulate them to generate photons. The photons are converted into optical signals through photomultiplier tube one, and are amplified through signal amplifier one at this time. The optical signal is input to the input end of oscilloscope two. During the long gap discharge process, it is subject to strong electromagnetic interference. The interference will pass through high-transmittance glass, pass through photomultiplier tube two and signal amplifier two under the same gain condition, and then be input to the other end of oscilloscope two. Oscilloscope two performs difference processing on the two signals, and then inputs the processed signals to the computer server to complete the measurement of long gap discharge high-energy X-ray interference elimination.

2. The long gap discharge high energy X-ray interference elimination measuring device under strong electromagnetic environment according to claim 1, Features: The impulse voltage generator is a common high-voltage discharge device.

3. The long gap discharge high energy X-ray interference elimination measuring device under strong electromagnetic environment according to claim 1, Features: The rod electrode is a needle-plate discharge or needle-needle discharge structure.

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