Neutron tube and its use

Abstract

The application relates to a neutron tube and application thereof, which comprises an ion source device, a neutron target, an X-ray target and an accelerating electrode device, the ion source device is used for ionizing gas and generating an ion beam; the neutron target and the X-ray target are coaxially arranged on one side of the ion source device; the accelerating electrode device is used for applying voltage and forming an electric field one and an electric field two between the ion source device and the neutron target respectively, the electric field one accelerates the ion beam, so that the ion beam bombards the neutron target to generate neutrons and electrons, and the electric field two can inhibit the electrons to generate neutrons when the neutron target is positively biased relative to the accelerating electrode device, and can reversely accelerate the electrons and make the electrons bombard the X-ray target to generate X-rays when the neutron target is negatively biased relative to the accelerating electrode device. The application can generate neutrons and X-rays, is various in functions and can meet different requirements; and the neutron generator can be applied to the fields of petroleum logging and article detection, can detect elements of articles and has high resolution.

Description

Technical Field

[0001] This invention relates to the field of radiation source technology, specifically to a neutron tube and its applications. Background Technology

[0002] Existing neutron tubes can only produce neutrons, which can be used in fields such as neutron logging and neutron radiography.

[0003] In the field of oil well logging, as people place increasing emphasis on health, safety, and environment (HSE), nuclear logging technology based on isotope chemical sources is gradually being limited in practical applications. Controlled neutron and X-ray sources, which control the emission and shutdown of neutrons or X-rays through electronic circuits, can effectively avoid radioactive hazards to the environment and personnel, and have gradually become favorable alternatives to isotope sources.

[0004] Furthermore, in the field of nondestructive testing, X-ray inspection technology has been widely used in security checks at airports and train stations. However, because X-rays primarily react with electrons outside the atomic nucleus and lack the ability to distinguish the characteristics of the atomic nucleus, they cannot differentiate the elemental composition of the object being tested. In real life, when contraband is mixed with everyday items and their densities are difficult to distinguish, X-ray imaging technology becomes largely ineffective. Neutron detection technology utilizes the reaction of neutrons with the atomic nuclei of matter to generate gamma rays with specific characteristics. The elemental composition of the object being tested can then be determined based on the energy spectrum of the gamma rays. Neutron detection technology effectively compensates for the limitation of X-ray detection in distinguishing the elemental composition of the object being tested, while X-ray detection technology effectively compensates for the low resolution of neutron detection.

[0005] The neutron tube in this invention can generate both neutrons and X-rays, which can not only effectively realize the passivity of nuclear logging in the oil field, but also combine neutron detection and X-ray detection to provide a high-resolution imaging device that can distinguish the composition of object elements. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a neutron tube and its application, aiming to solve the problems in the prior art.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] A neutron tube includes an ion source device, a neutron target, an X-ray target, and an accelerating electrode device. The ion source device is used to ionize gas and generate an ion beam. The neutron target and the X-ray target are coaxially distributed on one side of the ion source device, with the X-ray target located between the ion source device and the neutron target. The accelerating electrode device covers the neutron target and the X-ray target, and has a through hole at one end near the ion source device, which faces the ion source device. The accelerating electrode device is used to apply a voltage and form an electric field one and an electric field two with the ion source device and the neutron target, respectively. The electric field one accelerates the ion beam, causing the ion beam to bombard the neutron target to generate neutrons and electrons. The electric field two, when the neutron target is positively biased relative to the accelerating electrode device, can suppress electrons to generate neutrons, and when the neutron target is negatively biased relative to the accelerating electrode device, can reverse the acceleration of electrons and cause them to bombard the X-ray target to generate X-rays.

[0009] The beneficial effects of this invention are as follows: During operation, the ion source device ionizes the gas and generates an ion beam; the accelerating electrode device applies a voltage and forms electric field one and electric field two between itself and the ion source device and the neutron target, respectively. Electric field one accelerates the ion beam, causing it to bombard the neutron target to generate neutrons and electrons. Electric field two, when a positive bias is applied to the neutron target relative to the accelerating electrode device, can suppress electrons to generate neutrons; when a negative bias is applied to the neutron target relative to the accelerating electrode device, it can reverse-accelerate electrons and cause them to bombard the X-ray target to generate X-rays. This invention has a simple structure, can generate both neutrons and X-rays, has multiple functions to meet different needs, and is very convenient to use.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the accelerating electrode device includes at least one accelerating electrode, which is covered outside the neutron target and the X-ray target, and the through hole is located at one end of the accelerating electrode near the ion source device.

[0012] The beneficial effect of adopting the above-mentioned further scheme is that, during operation, the ion source device ionizes the gas and generates an ion beam; the accelerating electrode is used to apply voltage and form electric field one and electric field two between itself and the ion source device and the neutron target, respectively. Electric field one accelerates the ion beam so that the ion beam bombards the neutron target to generate neutrons and electrons, and electric field two can suppress electrons to generate neutrons when the neutron target is positively biased relative to the accelerating electrode device, and can reverse the acceleration of electrons and cause them to bombard the X-ray target to generate X-rays when the neutron target is negatively biased relative to the accelerating electrode device.

[0013] Furthermore, the accelerating electrode device includes a plurality of accelerating electrodes, which are coaxially and sequentially arranged, with the outermost accelerating electrode being closer to the ion source device; each of the plurality of accelerating electrodes has a through hole coaxially arranged at one end near the ion source device; the neutron target is installed in the innermost accelerating electrode at the end away from the ion source device; and the X-ray target is installed in the through hole in the outermost accelerating electrode at the end near the ion source device.

[0014] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and multiple accelerating electrodes working together to generate neutrons and X-rays.

[0015] Furthermore, the ion source device includes an ion source used to ionize gas and generate an ion beam.

[0016] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and ionization of gas by an ion source to generate an ion beam.

[0017] Furthermore, the ion source device also includes a gas regulator installed next to the ion source for releasing and absorbing gas; it also includes a housing, in which the gas regulator, the ion source device, and the accelerating electrode device are respectively installed.

[0018] The beneficial effect of adopting the above-mentioned further solution is that during operation, the gas can be released and absorbed through the gas regulator, thereby regulating the gas inside the casing and ensuring that the ion source can smoothly ionize the gas and generate an ion beam.

[0019] The present invention also relates to a neutron generator, including a pressure-bearing outer tube, a control circuit and a power supply, and further including the neutron tube as described above. The neutron tube, the control circuit and the power supply are respectively installed inside the pressure-bearing outer tube, and the control circuit, the ion source device inside the neutron tube, the accelerating electrode device, the neutron target and the X-ray target are respectively connected to the power supply through lines.

[0020] The advantages of adopting the above-mentioned further solution are that during operation, the working state of the accelerating electrode device and the ion source device is controlled by the control circuit, resulting in a high degree of automation; at the same time, the neutron generator can produce both neutrons and X-rays, offering multiple functions to meet different needs and making it very convenient to use.

[0021] The present invention also relates to a logging device, including a collector and a neutron generator as described above. The voltage applied by the accelerating electrode device and the electric field formed between the voltage applied by the accelerating electrode device and the ion source device accelerate the ion beam to bombard the neutron target. The generated neutrons react with the formation material to produce gamma rays and new neutrons. The electrons generated by the ion beam bombarding the neutron target are accelerated in the opposite direction and then bombard the X-ray target to produce X-rays, which react with the formation material to produce new X-rays.

[0022] The beneficial effect of adopting the above-mentioned further scheme is that during operation, the electric field formed between the voltage applied by the accelerating electrode device and the ion source device accelerates the ion beam to bombard the neutron target. The neutrons generated react with the formation material to produce gamma rays and new neutrons. The electric field formed between the voltage applied by the accelerating electrode device and the neutron target accelerates the ion beam to bombard the neutron target. The electrons generated are then accelerated in the opposite direction and bombard the X-ray target to produce X-rays, which react with the formation material to produce new X-rays. The collector is used to detect the new neutrons, gamma rays and new X-rays respectively and convert them into corresponding electrical signals, which is convenient for acquisition.

[0023] Furthermore, it also includes a controller and a transmission component, the transmission component being connected to the controller and the data collector respectively via lines.

[0024] The beneficial effect of adopting the above-mentioned further scheme is that during operation, the neutrons generated by the neutron generator react with the formation material to produce gamma rays and new neutrons, and the X-rays generated by the neutron generator react with the formation material to produce new X-rays. The collector detects the new neutrons, gamma rays and new X-rays respectively, converts them into corresponding electrical signals, and transmits the electrical signals to the controller through the transmission component. The controller receives the electrical signals and processes and analyzes them to determine the oil reserves in the formation near the oil well.

[0025] Furthermore, it also includes an outer tube, in which the collector is installed, and the transmission component and the neutron generator are respectively installed on the outer tube.

[0026] The advantages of adopting the above-mentioned further scheme are that it has a simple structure, reasonable design, and integrates the transmission component, the collector and the neutron generator into one unit through the outer tube, resulting in high integration and ease of use.

[0027] Furthermore, the collector includes at least one neutron detector and / or at least one gamma ray detector and / or at least one X-ray detector, wherein the neutron detector, the X-ray detector and the gamma ray detector are respectively connected to the transmission component via lines.

[0028] The beneficial effect of adopting the above-mentioned further scheme is that during operation, the neutrons generated by the neutron generator react with the formation material to produce gamma rays and new neutrons. At this time, the neutron detector collects the above-mentioned electrical signals and sends them to the controller. The X-rays generated by the neutron generator react with the formation material to produce new X-rays. At this time, the gamma ray detector collects the above-mentioned new neutrons, gamma rays and new X-rays and forms electrical signals, which are sent to the controller. At the same time, the X-ray detector collects the above-mentioned new X-rays and forms electrical signals, which are sent to the controller. The controller receives the above-mentioned electrical signals and processes and analyzes them to determine the oil reserves in the formation near the oil well.

[0029] The present invention also relates to a non-destructive testing device, comprising a transport assembly, a neutron imager, and a neutron generator as described above. The transport assembly is used to transport an article. The neutron generator is mounted on one side of the transport assembly. The accelerating electrode device in the neutron generator applies a voltage, and the electric field formed between the voltage and the ion source device accelerates the ion beam to bombard the neutron target, generating neutrons that are directed toward the article on the transport assembly. The neutron imager is mounted on the other side of the transport assembly and is used to detect the neutrons that have been directed toward the article on the transport assembly, so as to analyze the elemental composition and geometric features of the article.

[0030] The beneficial effect of adopting the above-mentioned further solution is that during operation, the item is transported through the transport component. When the item is located between the neutron generator and the neutron imager, the neutron generator generates neutrons and shoots them at the item on the transport component. At the same time, the neutron imager detects the neutrons that have shot at the item on the transport component to analyze the composition elements and geometric features of the item, which is convenient for detection.

[0031] Furthermore, it also includes an X-ray imager mounted on the other side of the transport assembly for detecting X-rays after irradiating an item on the transport assembly, in order to analyze the geometric features of the item.

[0032] The beneficial effect of adopting the above-mentioned further solution is that during operation, the item is transported through the transport component. When the item is located between the neutron generator and the X-ray imager, the X-ray imager generates X-rays and directs them toward the item on the transport component. At the same time, the X-ray imager detects the X-rays that are directed toward the item on the transport component. The detection is convenient and has high resolution.

[0033] Furthermore, the transmission assembly has an L-shaped structure, the neutron imager is located on the right side of the neutron generator, and the X-ray imager is located on the front side of the neutron generator.

[0034] The advantages of adopting the above-mentioned further scheme are that the structure is simple, it is convenient to install the neutron imager and the X-ray imager, and it is convenient for the neutron imager and the X-ray imager to cooperate separately to detect the items on the conveying component. The two do not affect each other and are reasonably distributed. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the neutron tube in this invention;

[0036] Figure 2 This is a schematic diagram of the neutron generator of the present invention;

[0037] Figure 3 This is a schematic diagram of the logging device in this invention;

[0038] Figure 4 This is a schematic diagram of the non-destructive testing device in this invention.

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Neutron target; 2. Accelerating electrode two; 3. X-ray target; 4. Accelerating electrode one; 5. Ion source; 6. Gas regulator; 7. Outer shell; 8. Pressure-bearing outer tube; 9. Control circuit; 10. Power supply; 11. Transmission assembly; 12. Outer tube; 13. Neutron detector; 14. Gamma ray detector; 15. Transmission assembly; 16. Neutron imager; 17. X-ray imager. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] Example 1:

[0046] like Figure 1 As shown, this embodiment provides a neutron tube, including an ion source device, a neutron target 1, an X-ray target 3, and an accelerating electrode device. The neutron target 1 and the X-ray target 3 are coaxially distributed on one side of the ion source device, and the X-ray target 3 is located between the ion source device and the neutron target 1. The accelerating electrode device covers the neutron target 1 and the X-ray target 3, and has a through hole at one end near the ion source device, which faces the ion source device. The accelerating electrode device is used to apply a voltage and form an electric field one and an electric field two between itself and the ion source device and the neutron target, respectively. The electric field one accelerates the ion beam, causing the ion beam to bombard the neutron target 1 to generate neutrons and electrons. The electric field two can suppress electrons to generate neutrons when the neutron target 1 is positively biased relative to the accelerating electrode device, and can reverse the acceleration of electrons and cause them to bombard the X-ray target 3 to generate X-rays when the neutron target 1 is negatively biased relative to the accelerating electrode device.

[0047] During operation, the ion source device ionizes the gas and generates an ion beam; the accelerating electrode device is used to apply voltage and form electric field one and electric field two between the ion source device and the neutron target, respectively. Electric field one accelerates the ion beam so that the ion beam bombards the neutron target to generate neutrons and electrons. Electric field two can suppress electrons to generate neutrons when the neutron target 1 is positively biased relative to the accelerating electrode device, and can reverse the acceleration of electrons and cause them to bombard the X-ray target 3 to generate X-rays when the neutron target 1 is negatively biased relative to the accelerating electrode device.

[0048] This embodiment has a simple structure and can generate both neutrons and X-rays, offering diverse functions to meet different needs and making it very convenient to use.

[0049] Example 2:

[0050] Based on Example 1, in this example, the accelerating electrode device includes at least one accelerating electrode, which is covered outside the neutron target 1 and the X-ray target 3, and the through hole is located at one end of the accelerating electrode near the ion source device.

[0051] During operation, the ion source device ionizes the gas and generates an ion beam. The accelerating electrode is used to apply voltage and form electric field one and electric field two between itself and the ion source device and the neutron target, respectively. Electric field one accelerates the ion beam so that the ion beam bombards the neutron target 1 to generate neutrons and electrons. Electric field two can suppress electrons to generate neutrons when the neutron target 1 is positively biased relative to the accelerating electrode device, and can reverse the acceleration of electrons and cause them to bombard the X-ray target 3 to generate X-rays when the neutron target 1 is negatively biased relative to the accelerating electrode device.

[0052] Example 3:

[0053] Based on Embodiment 2, in this embodiment, the accelerating electrode device includes multiple accelerating electrodes, which are coaxially arranged in sequence, with the outermost accelerating electrode being closer to the ion source device. The absolute value of the voltage of the multiple accelerating electrodes gradually increases from the outside to the inside. Each of the multiple accelerating electrodes has a through hole coaxially arranged at one end near the ion source device. The neutron target 1 is installed in the innermost accelerating electrode at the end away from the ion source device, and the X-ray target 3 is installed in the through hole in the outermost accelerating electrode at the end near the ion source device.

[0054] The scheme has a simple structure and a reasonable design, with multiple accelerating electrodes working together to generate neutrons and X-rays.

[0055] Preferably, in this embodiment, the first accelerating electrode 4 and the second accelerating electrode 2 are respectively in the form of a hollow rectangular body structure.

[0056] Preferably, in this embodiment, the number of the above-mentioned accelerating electrodes is preferably two, namely accelerating electrode 4 and accelerating electrode 2. Accelerating electrode 4 and accelerating electrode 2 are coaxially fixedly installed on one side of the ion source device, and accelerating electrode 2 is located inside accelerating electrode 4.

[0057] In addition, the accelerating electrode 4 and the accelerating electrode 2 are respectively provided with coaxially distributed through holes at the ends near the ion source device. The neutron target 1 is fixedly installed in the end of the accelerating electrode 2 away from the ion source device and is directly opposite the through hole on the accelerating electrode 2. The X-ray target 3 is fixedly installed at the through hole on the accelerating electrode 4 and is provided with circular holes coaxially distributed with the corresponding through hole.

[0058] Preferably, in this embodiment, the voltage of the first accelerating electrode 4 is lower than the voltage of the second accelerating electrode 2.

[0059] It should be noted that the neutron target 1, accelerating electrode 2, X-ray target 3 and accelerating electrode 4 mentioned above all use existing technology, and their specific structures and principles will not be described in detail here.

[0060] Example 4:

[0061] Based on the above embodiments, in this embodiment, the ion source device includes an ion source 5, which is used to ionize gas and generate an ion beam.

[0062] The scheme has a simple structure and reasonable design. It uses ion source 5 to ionize the gas and generate an ion beam.

[0063] It should be noted that the ion source 5 mentioned above uses existing technology, and its specific structure and principle will not be described in detail here.

[0064] Based on the above scheme, the ion source 5 is suspended and grounded, i.e., zero voltage; the accelerating electrode 1 4 and the accelerating electrode 2 2 are connected to negative voltage, and the absolute value of the voltage of the accelerating electrode 1 4 is lower than the absolute value of the voltage of the accelerating electrode 2 2. The voltage of the two accelerating electrodes remains constant during operation.

[0065] During operation, electric field one is formed between ion source 5 and accelerating electrode 4, and electric field two is formed between accelerating electrode 4 and accelerating electrode 2 (electric field one and electric field two here are not the same as electric field one and electric field two formed between the accelerating electrode and the ion source device and the neutron target respectively). The two electric fields accelerate the ion beam generated by the ion source and cause the ion beam to bombard the neutron target 1, producing neutrons and electrons. When a positive bias voltage is applied to the neutron target 1 relative to accelerating electrode 2, an electric field is formed between accelerating electrode 4, accelerating electrode 2 and neutron target 1, which confines electrons in the neutron target region and produces neutrons.

[0066] In addition, when a negative or zero bias voltage is applied to neutron target 1 relative to accelerating electrode 2, an electric field is formed between accelerating electrode 4, accelerating electrode 2, and neutron target 1 to suppress electrons generated by the deuterium-deuterium reaction (DD) or deuterium-tritium reaction (DT) to ensure neutron yield. When a negative or zero bias voltage is applied to neutron target 1 relative to accelerating electrode 2, an electric field is formed between accelerating electrode 4, accelerating electrode 2, and neutron target 1 to accelerate the generated electrons in the opposite direction and bombard X-ray target 3 to generate X-rays.

[0067] The function of the aforementioned accelerating electrode 4 is to form an electric field with the ion source 5 to accelerate the ion beam. The function of the accelerating electrode 2 is: firstly, to continue accelerating the ion beam, and secondly, to focus and collimate the electrons that are accelerated in the opposite direction when X-rays are generated.

[0068] The electric field formed between the ion source and the accelerating electrode is used to accelerate the ion beam, while the electric field formed between the accelerating electrode and the neutron target is used to suppress or reverse the acceleration of electrons.

[0069] If a positive bias is applied to the neutron target relative to the accelerating electrode, the electric field formed between the accelerating electrode and the neutron target will suppress electrons, and neutrons will be emitted.

[0070] If a negative bias is applied to the neutron target relative to the accelerating electrode, the electric field formed between the accelerating electrode and the neutron target will accelerate electrons in the opposite direction, bombarding the X-ray target and producing X-rays.

[0071] Example 5:

[0072] Based on Embodiment 4, in this embodiment, the ion source device further includes a gas regulator 6, which is installed next to the ion source 5 for releasing and absorbing gas; it also includes a housing 7, in which the gas regulator 6, the ion source device and the accelerating electrode device are respectively installed.

[0073] During operation, gas can be released through gas regulator 6 to regulate the gas inside the outer casing 7, ensuring that the ion source 5 can successfully ionize the gas and generate an ion beam.

[0074] Preferably, in this embodiment, the gas regulator 6 is a gas release device in the prior art, used to release gas to regulate the gas inside the housing 7, so as to ensure that the ion source 5 can successfully ionize the gas to form an ion beam.

[0075] Preferably, in this embodiment, the elongated cylindrical structure of the outer shell 7 has a regular shape and is neat and aesthetically pleasing.

[0076] In addition, the aforementioned outer casing 7 integrates all components into one unit, making it more convenient to use.

[0077] Example 6:

[0078] Based on the above embodiments, such as Figure 2 As shown, this embodiment also provides a neutron generator, including a pressure-bearing outer tube 8, a control circuit 9, and a power supply 10, and also includes the neutron tube as described above. The neutron tube, the control circuit 9, and the power supply are respectively installed inside the pressure-bearing outer tube 8, and the control circuit 9, the ion source device, the accelerating electrode device, the neutron target 1, and the X-ray target 3 inside the neutron tube are respectively connected to the power supply 10 through lines.

[0079] During operation, the working status of the accelerating electrode device and the ion source device is controlled by the control circuit 9, which has a high degree of automation. At the same time, this neutron generator can produce both neutrons and X-rays, which can meet different needs and is very convenient to use.

[0080] Preferably, in this embodiment, the long, cylindrical structure of the pressure-bearing outer tube 8 is regular in shape and aesthetically pleasing.

[0081] It should be noted that the control circuit 9 mentioned above uses existing technology, and its specific structure and principle will not be described in detail here.

[0082] In addition, the materials used for the aforementioned pressure-bearing outer tube 8 and outer shell 7 are capable of allowing neutron beams and X-rays to pass through.

[0083] Based on the above scheme, the ion source device, neutron target 1, X-ray target 3, accelerating electrode device and gas regulator 6 are respectively installed in the outer casing 7; while the control circuit 9, power supply 10 and the entire neutron tube are respectively installed in the pressure-bearing outer tube 8.

[0084] Example 7:

[0085] Based on Example 6, such as Figure 3 As shown, this embodiment also provides a logging device, including a collector and a neutron generator as described above. The voltage applied by the accelerating electrode device and the electric field formed between the accelerating electrode device and the ion source device accelerate the ion beam to bombard the neutron target 1. The neutrons generated react with the formation material to produce gamma rays and new neutrons. The voltage applied by the accelerating electrode device and the electric field formed between the accelerating electrode device and the neutron target 1 accelerate the ion beam to bombard the neutron target 1. The electrons generated are accelerated in the opposite direction and then bombard the X-ray target 3 to produce X-rays, which react with the formation material to produce new X-rays.

[0086] During operation, the voltage applied by the accelerating electrode device and the electric field formed between it and the ion source device accelerate the ion beam to bombard the neutron target 1. The neutrons generated react with the formation material to produce gamma rays and new neutrons. The voltage applied by the accelerating electrode device and the electric field formed between it and the neutron target 1 accelerate the ion beam to bombard the neutron target 1. The electrons generated are then accelerated in the opposite direction and bombard the X-ray target 3. The X-rays generated react with the formation material to produce new X-rays. The collector is used to detect the new neutrons, gamma rays and new X-rays respectively and convert them into corresponding electrical signals, which is convenient for acquisition.

[0087] Example 8:

[0088] Based on Embodiment 7, this embodiment also includes a controller and a transmission component 11, which are connected to the controller, the data collector, and the neutron generator via lines.

[0089] During operation, the neutrons generated by the neutron generator react with the formation material to produce gamma rays and new neutrons, forming an electrical signal. The X-rays generated by the neutron generator react with the formation material to produce new X-rays. The collector detects the new neutrons, gamma rays, and new X-rays respectively, converts them into corresponding electrical signals, and transmits the electrical signals to the controller through the transmission component 11. The controller receives the electrical signals and processes and analyzes them to determine the oil reserves in the formation near the oil well.

[0090] It should be noted that the controller mentioned above uses existing technology and is equivalent to a ground control center.

[0091] Example 9:

[0092] Based on embodiment 8, this embodiment also includes an outer tube 12, with the collector installed inside the outer tube 12, and the transmission component 11 and the neutron generator respectively installed on the outer tube 12.

[0093] The scheme has a simple structure and reasonable design. The transmission component 11, the collector and the neutron generator are integrated into one unit through the outer tube 12. It has a high degree of integration and is easy to use.

[0094] The aforementioned transmission component 11 uses an electrical signal transmitter from the prior art, and its specific structure and principle will not be described in detail here.

[0095] Preferably, in this embodiment, the outer tube 12 has a long, cylindrical structure that is regular in shape and aesthetically pleasing.

[0096] During logging, the cable connected to the transmission component 11 passes through one end of the outer tube 12 and extends to the outside of the well body to connect with the controller, so that the entire device is suspended inside the well body.

[0097] Based on the above scheme, the ion source device, neutron target 1, X-ray target 3, accelerating electrode device and gas regulator 6 are respectively installed in the outer casing 7; while the control circuit 9, power supply 10 and the entire neutron tube are respectively installed in the pressure-bearing outer tube 8.

[0098] In addition, the transmission component 11 and the neutron generator are respectively installed at both ends of the outer tube 12, and the opposite ends of the transmission component 11 and the neutron generator are fixedly connected to the two ends of the outer tube 12.

[0099] In addition to the above-described embodiments, the transmission component 11, the collector, and the neutron generator are respectively installed inside the outer tube 12.

[0100] Example 10:

[0101] Based on any one of Embodiments 8 to 9, in this embodiment, the collector includes at least one neutron detector 13 and / or at least one gamma ray detector 14 and / or at least one X-ray detector, and the neutron detector 13, X-ray detector and gamma ray detector 14 are respectively connected to the transmission component 11 via lines.

[0102] During operation, the neutrons generated by the neutron generator react with the formation material to produce gamma rays and secondary neutrons. At this time, the neutron detector 13 and the gamma detector 14 collect the information of the secondary neutrons and gamma rays and convert them into electrical signals, which are then sent to the controller. The X-rays generated by the neutron generator react with the formation material to produce new X-rays. At this time, the X-ray detector collects the information of the new X-rays and forms electrical signals, which are then sent to the controller. The controller receives the electrical signals and processes and analyzes them to determine the oil reserves in the formation near the oil well.

[0103] The aforementioned neutron detector 13 can collect both neutron counts and time spectra, forming different logging instruments to achieve different logging objectives. The gamma-ray detector 14 works similarly.

[0104] 1) When the neutron generator produces neutrons, these neutrons enter the formation and interact with the formation material, producing secondary neutrons and gamma rays. At this time, the X-ray detector is not operational; the neutron detector detects the secondary neutron information, and the gamma ray detector detects the gamma ray information, converting them into electrical signals. These signals are then transmitted to the surface system via a transmission sub. The surface system processes the data and plots logging curves to further obtain data such as downhole oil and gas distribution and reserves. Neutron porosity logging can be performed by measuring neutron flux; the lower the neutron flux, the greater the formation porosity and the higher the oil content. Pulsed neutron-neutron logging can be performed by measuring the neutron time spectrum to determine the saturation of remaining oil downhole. Formation density logging and carbon-oxygen ratio logging can be performed by measuring the gamma ray time spectrum. Formation element logging can be performed by measuring the gamma ray energy spectrum.

[0105] 2) When the neutron generator produces X-rays, these X-rays enter the formation and interact with the formation material, generating new X-rays. At this time, the neutron detector and gamma detector are not operating. The X-ray detector detects the new X-ray information and converts it into an electrical signal, which is transmitted to the surface system via a transmission sub. The surface system processes the data and plots logging curves to further obtain data such as downhole oil reservoir dynamics. Density logging can be performed by measuring the X-ray count and energy spectrum.

[0106] Preferably, in this embodiment, the collector includes a plurality of neutron detectors 13 arranged in parallel, a plurality of X-ray detectors arranged in parallel, and a plurality of gamma-ray detectors 14 arranged in parallel. The plurality of neutron detectors 13, the plurality of X-ray detectors, and the plurality of gamma-ray detectors 14 are respectively connected to the transmission component 11 through lines, and are respectively connected to the neutron generator and the X-ray generator through lines.

[0107] Preferably, in this embodiment, the aforementioned data acquisition device can also adopt other combinations, such as any combination of neutron detectors, gamma-ray detectors, and X-ray detectors. For example, the data acquisition device includes three types of detectors: neutron detectors, gamma-ray detectors, and X-ray detectors, and the number of the three types of detectors is not limited and can be designed according to requirements; or the three types of detectors can be combined in pairs. Neutron detectors can perform porosity logging and pulsed neutron-neutron saturation logging, gamma-ray detectors can perform elemental logging, carbon-oxygen ratio logging, and oxygen activation logging, etc., and X-ray detectors can perform X-ray density logging.

[0108] Preferably, in this embodiment, the neutron detector 13 can be used to perform porosity logging and pulsed neutron-neutron saturation logging, the gamma detector 14 can be used to perform elemental logging, carbon-oxygen ratio logging and oxygen activation logging, and the X-ray detector can be used to perform X-ray density logging.

[0109] It should be noted that the neutron detector 13, X-ray detector and gamma-ray detector 14 mentioned above all use existing technology, and their specific structures and principles will not be described in detail here.

[0110] In addition, the aforementioned controller is part of the ground system.

[0111] Furthermore, by controlling the working state of the neutron target 1, the X-ray target 3, and the accelerating electrode device through the aforementioned controller, the neutron generator produces neutrons and X-rays. However, the production of neutrons and X-rays does not occur simultaneously; one of them is selected at a time.

[0112] Example 11:

[0113] Based on Example 6, such as Figure 4 As shown, this embodiment also provides a non-destructive testing device, including a conveying assembly 15, a neutron imager 16, and a neutron generator as described above. The conveying assembly 15 is used to convey an article; the neutron generator is installed on one side of the conveying assembly 15, and the accelerating electrode device in the neutron generator applies a voltage and an electric field formed between it and the ion source device to accelerate the ion beam to bombard the neutron target 1 and direct the neutrons generated thereon toward the article on the conveying assembly; the neutron imager 16 is installed on the other side of the conveying assembly 15 and is used to detect the neutrons that have been directed toward the article on the conveying assembly 15 in order to analyze the elemental composition of the article.

[0114] During operation, the item is transported via the transport assembly 15. When the item is located between the neutron generator and the neutron imager 16, the neutron generator generates neutrons and directs them toward the item on the transport assembly 15. At the same time, the neutron imager 16 detects the neutrons that are directed toward the item on the transport assembly 15 and analyzes the elemental composition of the item, making detection convenient.

[0115] Preferably, in this embodiment, the neutron imager 16 is a neutron imager in the prior art, and its specific structure and principle will not be described in detail here.

[0116] The aforementioned neutron imager 16 utilizes the principle of neutron radiography, which uses the attenuation of the intensity of a neutron beam as it passes through an object to perform a perspective image of the object under test, thereby reflecting comprehensive information such as the spatial distribution, density, and various defects of the material inside the sample.

[0117] The above-described embodiments 7 and 11 are different applications of the neutron generator provided in embodiment 6.

[0118] Example 12:

[0119] Based on embodiment 11, this embodiment also includes an X-ray imager 17, which is installed on the other side of the conveying assembly 15 and is used to detect X-rays after irradiating an item on the conveying assembly 15 in order to analyze the geometric features of the item.

[0120] During operation, the item is transported via the conveyor assembly 15. When the item is located between the neutron generator and the X-ray imager 17, the X-ray imager 17 generates X-rays and directs them toward the item on the conveyor assembly 15. At the same time, the X-ray imager 17 detects the X-rays that are directed toward the item on the conveyor assembly 15. The detection is convenient and has high resolution.

[0121] Preferably, in this embodiment, the X-ray imager 17 is an existing X-ray imager, the specific structure and principle of which will not be described in detail here.

[0122] Based on the above scheme, since multiple items are placed at intervals along the transmission direction on the transmission component 15 during the transmission process, when each item arrives between the neutron generator and the neutron imager 16, the neutron imager 16 receives the corresponding neutron to distinguish the constituent elements and geometric features of the item; when each item arrives between the neutron generator and the X-ray imager 17, the X-ray imager 17 receives the corresponding X-ray to analyze the geometric features of the item.

[0123] The non-destructive testing device provided in this embodiment can be applied to many fields, such as customs security inspection and subway station security inspection.

[0124] Example 13:

[0125] Based on Embodiment 12, in this embodiment, the transmission component 15 has an L-shaped structure, the neutron imager 16 is located on the right side of the neutron generator, and the X-ray imager 17 is located on the front side of the neutron generator.

[0126] The scheme has a simple structure, which facilitates the installation of neutron imager 16 and X-ray imager 17. It also allows neutron imager 16 and X-ray imager 17 to work together to detect items on the conveying assembly 15. The two do not interfere with each other and are reasonably distributed.

[0127] Preferably, in this embodiment, the conveying component 15 is an L-shaped belt conveyor in the prior art, with the belt horizontally arranged, and its specific structure and principle will not be described in detail here.

[0128] It should be noted that all electronic components involved in this invention adopt existing technology, and the electrical connections between the above-mentioned components and the control circuits between the components are existing technology.

[0129] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0130] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0131] 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, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A neutron tube, characterized in that: The device includes an ion source, a neutron target (1), an X-ray target (3), and an accelerating electrode. The ion source is used to ionize gas and generate an ion beam. The neutron target (1) and the X-ray target (3) are coaxially distributed on one side of the ion source, and the X-ray target (3) is located between the ion source and the neutron target (1). The accelerating electrode covers the neutron target (1) and the X-ray target (3), and has a through hole at one end near the ion source, which faces the ion source. The accelerating electrode device is used to apply voltage and form electric field one and electric field two between the ion source device and the neutron target (1), respectively. Electric field one accelerates the ion beam so that the ion beam bombards the neutron target (1) to produce neutrons and electrons. Electric field two can suppress electrons to produce neutrons when the neutron target (1) is positively biased relative to the accelerating electrode device, and can reverse the acceleration of electrons and make them bombard the X-ray target (3) to produce X-rays when the neutron target (1) is negatively biased relative to the accelerating electrode device. The accelerating electrode device includes at least one accelerating electrode, which is covered outside the neutron target (1) and the X-ray target (3), and the through hole is located at one end of the accelerating electrode near the ion source device.

2. The neutron tube according to claim 1, characterized in that: The accelerating electrode device includes a plurality of accelerating electrodes, which are coaxially arranged in sequence, with the outermost accelerating electrode being close to the ion source device. The ends of the plurality of accelerating electrodes close to the ion source device are respectively coaxially provided with through holes. The neutron target (1) is installed in the innermost accelerating electrode at the end away from the ion source device, and the X-ray target (3) is installed in the through hole in the outermost accelerating electrode at the end close to the ion source device.

3. The neutron tube according to any one of claims 1-2, characterized in that: The ion source device includes an ion source (5) for ionizing gas and generating an ion beam.

4. The neutron tube according to claim 3, characterized in that: The ion source device also includes a gas regulator (6), which is installed next to the ion source (5) for releasing and absorbing gas; it also includes a housing (7), in which the gas regulator (6), the ion source device and the accelerating electrode device are respectively installed.

5. A neutron generator, comprising a pressure-bearing outer tube (8), a control circuit (9), and a power supply (10), characterized in that: It also includes a neutron tube as described in any one of claims 1-4, wherein the neutron tube, the control circuit (9) and the power supply (10) are respectively installed inside the pressure-bearing outer tube (8), and the control circuit (9), the ion source device inside the neutron tube, the accelerating electrode device, the neutron target (1) and the X-ray target (3) are respectively connected to the power supply (10) via lines.

6. A well logging device, characterized in that: Includes a collector, a controller, a transmission component (11), and a neutron generator as described in claim 5. The voltage applied by the accelerating electrode device and the electric field formed between the voltage applied by the accelerating electrode device and the ion source device accelerate the ion beam to bombard the neutron target (1). The neutrons generated react with the formation material to produce gamma rays and new neutrons. The electric field formed between the voltage applied by the accelerating electrode device and the neutron target (1) accelerates the ion beam to bombard the neutron target (1). The electrons generated are accelerated in the opposite direction and then bombard the X-ray target (3). The X-rays generated react with the formation material to produce new X-rays. The collector is used to detect new neutrons, gamma rays and new X-rays respectively, and convert them into corresponding electrical signals; the transmission component (11) is connected to the controller and the collector respectively through lines.

7. The logging device according to claim 6, characterized in that: The collector includes at least one neutron detector (13) and / or at least one gamma ray detector (14) and / or at least one X-ray detector, wherein the neutron detector (13), the X-ray detector and the gamma ray detector (14) are respectively connected to the transmission assembly (11) via lines.

8. A non-destructive testing device, characterized in that: The device includes a transport assembly (15), a neutron imager (16), an X-ray imager (17), and a neutron generator as described in claim 5. The transport assembly (15) is used to transport an article. The neutron generator is installed on one side of the transport assembly (15). The accelerating electrode device in the neutron generator applies a voltage, and an electric field is formed between the voltage applied and the ion source device to accelerate the ion beam, which bombards the neutron target (1) to generate neutrons that are directed toward the article on the transport assembly. The neutron imager (16) is installed on the other side of the transport assembly (15) to detect neutrons that have been directed toward the article on the transport assembly (15) in order to analyze the composition and geometric features of the article. The X-ray imager (17) is installed on the other side of the transport assembly (15) to detect X-rays that have been directed toward the article on the transport assembly (15) in order to analyze the geometric features of the article.

9. The non-destructive testing device according to claim 8, characterized in that: The transmission component (15) has an L-shaped structure, the neutron imager (16) is located on the right side of the neutron generator, and the X-ray imager (17) is located on the front side of the neutron generator.

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