Cathode assembly, control method of cathode assembly and X-ray tube

Abstract

The invention relates to the technical field of X-ray tubes, provides a cathode assembly, a control method of the cathode assembly and an X-ray tube, and can meet various functional requirements of the X-ray tube. The cathode assembly comprises a first component which is arranged on a base and has a function of emitting electron beams; the second component is arranged on the base, the second component is arranged on the periphery of the first component, the first component and the second component are insulated, and the second component has the function of adjusting the electron beam emitted by the first component; the second part is provided with at least two potential pins, and the second part contains an electron beam emission material.

Description

Technical Field

[0001] The present application relates to the technical field of X-ray tubes, and in particular to a cathode assembly, a control method for a cathode assembly, and an X-ray tube. Background Art

[0002] With the rapid development of medical technology, the demand for X-ray tubes in medical imaging technology is also increasing. Due to the limitations of technological development, different medical needs often correspond to different X-ray tubes, and the parameters and corresponding functions of different X-ray tubes are also different. For example, X-ray tubes used for computed tomography require high power and large tube current, and X-ray tubes used for angiography require multiple focal points, current and voltage can be instantly cut off and other functions. The more and higher the functional requirements for X-ray tubes, the higher the design cost and use cost of the corresponding X-ray tubes, and the design difficulty will also increase accordingly. In order to meet the various functional requirements of X-ray tubes, it is necessary to provide a cathode assembly. Summary of the invention

[0003] Based on this, it is necessary to provide a cathode assembly, a control method for a cathode assembly and an X-ray tube to address the above technical problems.

[0004] The present application provides a cathode assembly, the cathode assembly comprising:

[0005] A first component is arranged on a base, wherein the first component has a function of emitting an electron beam;

[0006] A second component is arranged on the base, the second component is arranged on the periphery of the first component, the first component and the second component are insulated, and the second component has a function of adjusting the electron beam emitted by the first component;

[0007] The second component is provided with at least two potential pins, and the second component contains electron beam emitting material.

[0008] In one embodiment, the second component is located on at least two sides of the outer circumference of the first component.

[0009] In one embodiment, the second component is disposed around a circumference of the first component.

[0010] In one embodiment, there is a gap between the second component and the first component in a transverse plane, and the transverse plane is a plane perpendicular to the emission direction of the electron beam;

[0011] A difference between a gap between the second component and the first side of the first component on the transverse plane and a gap between the second component and the second side of the first component on the transverse plane is within a set range; the second side is an opposite side to the first side.

[0012] In one embodiment, the second component is disposed entirely around the first component.

[0013] In one embodiment, the second component as a whole comprises an insulating medium, and the insulating medium divides the second component as a whole into at least two independently controllable second sub-components.

[0014] In one embodiment, the second component includes at least two second sub-components, and the second sub-components are arranged at intervals.

[0015] In one embodiment, the shape of the second component in the cross-sectional view of the transverse plane includes a winding portion, and the winding portion is configured to be in a winding shape, and the transverse plane is a plane perpendicular to the emission direction of the electron beam.

[0016] In one embodiment, there is a gap between the first component and the second component in the longitudinal direction, and the distance between the first component and the base in the longitudinal direction is smaller than the distance between the second component and the base in the longitudinal direction; the longitudinal direction is the emission direction of the electron beam.

[0017] In one embodiment, the second component includes a proximal end and a distal end divided relative to the distance between the first component and the base, and the second component is arranged on opposite sides of the outer circumference of the first component, and the distance between the oppositely arranged proximal ends is smaller than the distance between the oppositely arranged distal ends.

[0018] The present application provides a method for controlling a cathode assembly, wherein the cathode assembly to be controlled is the cathode assembly of any of the above embodiments, and the method comprises:

[0019] controlling the potentials of the different potential pins of the second component;

[0020] If the potentials of all the potential pins of the second component are the same, causing the second component to adjust the electron beam emitted by the second component to the first component;

[0021] If the potentials of at least two pins of the second component are different, the second component is caused to emit an electron beam.

[0022] In one embodiment, when the second component includes at least two second sub-components, controlling the potentials of different potential pins of the second component includes:

[0023] controlling the potentials of two potential pins of the second subcomponent;

[0024] If the potentials of the two potential pins of one of the second subcomponents are different and the potentials of the two potential pins of the other second subcomponents are the same, one of the second subcomponents is made to emit an electron beam, and the other second subcomponent is made to adjust the electron beams emitted by the first component and one of the second subcomponents.

[0025] In one embodiment, the value of the potential is switched at a set frequency.

[0026] The present application provides a control device for a cathode assembly, wherein the cathode assembly to be controlled is the cathode assembly of any of the above embodiments, and the device comprises:

[0027] A potential control module, used for controlling the potentials of different potential pins of the second component;

[0028] If the potentials of all the potential pins of the second component are the same, causing the second component to adjust the electron beam emitted by the second component to the first component;

[0029] If the potentials of at least two pins of the second component are different, the second component is caused to emit an electron beam.

[0030] In one embodiment, the potential control module is also used to control the potential of two potential pins of the second sub-component; if the potentials of the two potential pins of one of the second sub-components are different and the potentials of the two potential pins of the other second sub-component are the same, one of the second sub-components is enabled to emit an electron beam, and the other second sub-component is enabled to adjust the electron beams emitted by the first component and one of the second sub-components.

[0031] In one embodiment, the value of the potential is switched at a set frequency.

[0032] The present application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the above method.

[0033] The present application provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to execute the above method.

[0034] The present application provides a computer program product, on which a computer program is stored, and the computer program is executed by a processor to perform the above method.

[0035] The present application provides an X-ray tube, which includes a cathode assembly as described in any of the above embodiments.

[0036] The cathode assembly provided by the present application includes a first component and a second component, the first component and the second component are arranged on a base, the first component has the function of emitting an electron beam, and the second component has the function of adjusting the electron beam emitted by the first component; the second component is configured with at least two potential pins and contains an electron beam emitting material. Based on this setting, when the potentials of the two potential pins are the same, the second component can be used as a grid in the cathode assembly to adjust the electron beam emitted by the first component to obtain a small focus; when the potentials of the two potential pins are different, the second component can be used as an electron emitter in the cathode assembly to emit an electron beam together with the first component to obtain a large focus, thereby meeting the various functional requirements of the X-ray tube. In addition, based on this setting, under the traditional hot filament structure, there is no need to use a base to block the different first components that serve as filaments, thereby reducing the volume of the cathode assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of a cathode assembly in one embodiment;

[0038] Figure 2 A schematic diagram of an embodiment in which second areas are arranged on both sides of a first area;

[0039] Figure 3 A schematic diagram of an embodiment in which a second area is arranged around a first area;

[0040] Figure 4 is a schematic diagram of an embodiment in which the second component contains an insulating medium;

[0041] Figure 5 A schematic diagram of an embodiment in which the second region includes a vacuum insulation region;

[0042] FIG6( a ) is a schematic diagram of the shape of a local detour portion in one embodiment;

[0043] FIG6( b ) is a schematic diagram of another shape of a local detour portion in one embodiment;

[0044] FIG6( c ) is a schematic diagram of another shape of a local detour portion in one embodiment;

[0045] FIG6( d ) is a schematic diagram of another shape of a local detour portion in one embodiment;

[0046] FIG6( e ) is a schematic diagram of another shape of a local detour portion in one embodiment;

[0047] Figure 7 is a schematic diagram of a longitudinal section in one embodiment;

[0048] Figure 8 is a schematic diagram of a simulation of an electric field around a first component in one embodiment;

[0049] Fig. 9 is another schematic diagram of a longitudinal section in one embodiment;

[0050] Fig.10 is another schematic diagram of a longitudinal section in one embodiment;

[0051] Fig.11 is another schematic diagram of a longitudinal section in one embodiment;

[0052] Fig.12 is a schematic diagram of a longitudinal section of a second component including four potential pins in one embodiment;

[0053] Fig.13 is another schematic diagram of a longitudinal section of a second component including four potential pins in one embodiment;

[0054] Fig.14 is another schematic diagram of a longitudinal section of a second component including four potential pins in one embodiment;

[0055] Fig.15 is another schematic diagram of a longitudinal section of a second component including four potential pins in one embodiment;

[0056] Fig.16 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0058] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0059] An embodiment of the present application provides a cathode assembly, which includes a first component and a second component; the first component and the second component can be arranged on a base, the second component is arranged on the periphery of the first component, and the first component and the second component are insulated.

[0060] Reference Figure 1The base can be divided into two types of regions, namely the first region and the second region; wherein the first component can be in the first region, and the second component can be in the second region, so that the second component is outside the first component. The first component and the second component can be insulated from each other, specifically by providing vacuum insulation or insulating material between the first region and the second region to insulate the first component and the second component from each other.

[0061] When the first component is used as an electron emitter in the cathode assembly, it has the function of emitting an electron beam; when the second component is used as a grid in the cathode assembly, it has the function of adjusting the electron beam emitted by the first component. The grid's adjustment function of the electron beam may include changing the focus size, shape, and cutting off the electron beam.

[0062] The electron beam emitted by the first component is directed toward the anode target surface. The electron beam emission direction is the z-axis. The x-axis and y-axis are set perpendicular to each other on a plane perpendicular to the electron beam emission direction. The point where the z-axis, x-axis and y-axis intersect is called point O. Figure 1 shown.

[0063] The first component contains a material for electron beam emission, such as tungsten material. The first component can be configured with at least two potential pins. When the potentials of the two potential pins configured in the first component are different, there is a closed-loop current in the first component. When the first component is realized by a filament, the closed-loop current flows along the filament, and the flow plane of the closed-loop current is consistent with the plane where the filament is located. Exemplarily, when the filament of the first component is in the xOy plane, the flow plane of the closed-loop current is the xOy plane. Another exemplary embodiment is that when the plane where the filament of the first component is located is inclined compared to the xOy plane, the flow plane of the closed-loop current is also inclined compared to the xOy plane. Under the action of the high voltage between the cathode assembly and the anode target surface, the electrons forming the closed-loop current of the first component will escape and be emitted toward the anode target surface. The voltage difference between the cathode assembly and the anode target surface is large, and the voltage difference can be recorded as NkV. N can be set according to actual conditions. Generally, N can be set to 140, that is, the voltage difference between the cathode assembly and the anode target surface is 140kV.

[0064] The second component is configured with at least two potential pins, and the second component contains electron beam emitting material, such as tungsten material.

[0065] When the potentials of the two potential pins configured in the second component are the same, there is no current in the second component, and the second component acts as a grid in the cathode assembly to adjust the electron beam emitted by the first component, such as focusing the electron beam emitted by the first component to obtain a small focus, or suppressing the current between the cathode assembly and the anode target surface, or cutting off the current between the cathode assembly and the anode target surface. When the second component acts as a grid in the cathode assembly, the potential of the second component is lower than the potential of the first component. When the second component acts as a grid in the cathode assembly, those skilled in the art may also set the potential of the second component to be higher than or equal to the potential of the first component.

[0066] When the potentials of the two potential pins configuring the second component are different, there is a closed-loop current in the second component, and the second component serves as an electron emitter in the cathode assembly; when the second component is implemented by a filament, the closed-loop current flows along the filament, and the flow plane of the closed-loop current is consistent with the plane where the filament is located. Exemplarily, when the filament of the second component is in the xOy plane, the flow plane of the closed-loop current is the xOy plane. Another exemplary embodiment is that when the plane where the filament of the second component is located is tilted compared to the xOy plane, the flow plane of the closed-loop current is also tilted compared to the xOy plane. Under the action of the high voltage between the cathode assembly and the anode target surface, the electrons forming the closed-loop current of the second component will escape and be emitted toward the anode target surface.

[0067] It should be noted that when the second component is used as an electron emitter or grid in the cathode assembly, the second component will generate an electric field effect on the electron beam emitted by the first component.

[0068] The electron beam emitting material contained in the first component and the electron beam emitting material contained in the second component may be different or the same. The proportion of the electron beam emitting material in the first component and the second component may be different or the same, which is not limited in the embodiment of the present application.

[0069] The cathode assembly provided by the present application includes a first component and a second component, the first component and the second component are arranged on a base, the first component has the function of emitting an electron beam, and the second component has the function of adjusting the electron beam emitted by the first component; the second component is configured with at least two potential pins and contains an electron beam emitting material. Based on this setting, when the potentials of the two potential pins are the same, the second component can be used as a grid in the cathode assembly to adjust the electron beam emitted by the first component to obtain a small focus; when the potentials of the two potential pins are different, the second component can be used as an electron emitter in the cathode assembly to emit an electron beam together with the first component to obtain a large focus, thereby meeting the various functional requirements of the X-ray tube. In addition, based on this setting, under the traditional hot filament structure, there is no need to use a base to block the different first components that serve as filaments, thereby reducing the volume of the cathode assembly.

[0070] In one embodiment, the second component is located on at least two sides of the outer periphery of the first component.

[0071] Reference Figure 2 , Figure 2 It is a cross-sectional view of the xOy plane. The second region can be set on both sides of the periphery of the first region, the second component is located in the second region, and the first component is located in the first region, so that the second component is located on both sides of the periphery of the first component.

[0072] At least one direction is set in the xOy plane, and the second component can be located on both sides of the first component in the direction, and is arranged opposite to each other. For example, the second component can be located on both sides of the first component in the x-axis direction, and the second component can be located on both sides of the first component in the y-axis direction.

[0073] When the second components are arranged on both sides of the first component, the two second components can be insulated from each other, and each second component can be configured with two potential pins. When the above-mentioned closed-loop current exists in the two second components, the two second components act as electron emitters in the cathode assembly and can emit electron beams to the anode target surface; when the above-mentioned closed-loop current does not exist in the two second components, the two components act as grids in the cathode assembly and can adjust the electron beam emitted by the first component. It should be noted that the two second components are not required to be electron emitters or grids at the same time.

[0074] The second components located on both sides of the first component may be a symmetrical structure or an asymmetrical structure, which is not limited in the embodiment of the present application.

[0075] The second components located on both sides of the first component can be implemented by using filaments.

[0076] In one embodiment, the second component is disposed around the periphery of the first component.

[0077] Reference Figure 3 , Figure 3 It is a cross-sectional view of the xOy plane. The second region can be arranged around the periphery of the first region, the second component is located in the second region, and the first component is located in the first region, so that the second component is arranged around the periphery of the first component.

[0078] Several directions around the first region may be set in the xOy plane, for example, several directions around the first region may be set, and in this case, the second component may be located on both sides of each direction so that the second component is disposed around the periphery of the first component.

[0079] The second component may be located on both sides of the first component in the x-axis direction, and the second component may be located on both sides of the first component in the y-axis direction.

[0080] In one embodiment, a gap exists between the second component and the first component in a transverse plane, and the transverse plane is a plane perpendicular to the emission direction of the electron beam. Figure 1 , this lateral plane corresponds to the xOy plane.

[0081] The difference between the gap between the second component and the first side of the first component on the transverse plane and the gap between the second component and the second side of the first component on the transverse plane is within a set range; the second side is the opposite side of the first side.

[0082] The first side and the second side are in the same direction, for example, in the x-axis direction or the y-axis direction. For example, the first side and the second side are in the x-axis direction. Figure 2 As shown in or 3, there are gaps between the second component and the first component on both sides of the x-axis, which are a11 and a12 respectively. The difference between a11 and a12 is within a set range, and the set range can be a range near 0. The difference between a11 and a12 is not much different, and the gaps between the second component and the first component on both sides of the x-axis are basically equal.

[0083] Take the first side and the second side in the y-axis direction as an example, Figure 3 As shown, there is a gap between the second component and the first component on both sides of the y-axis, which are a21 and a22 respectively. The difference between a21 and a22 is within a set range, and the set range can be a range near 0. The difference between a21 and a22 is not much different, and the gap between the second component and the first component on both sides of the y-axis is not much different.

[0084] In this embodiment, the difference between the gap between the second component and the first side of the first component on the transverse plane and the gap between the second component and the second side of the first component on the transverse plane is within a set range, which is beneficial to the control of the electron beam.

[0085] In one embodiment, the second component is disposed entirely around the first component.

[0086] The second component can be used as an integral component and can be integrally arranged around the first component. When the second component is used as an integral component, the second component can contain an insulating medium or a vacuum insulating gap.

[0087] In one embodiment, the second component as a whole comprises an insulating medium, and the insulating medium divides the second component as a whole into at least two independently controllable second sub-components.

[0088] The insulating medium can be an insulating material such as ceramics, and the insulating medium can be distributed along the electron beam emission direction, such as Figure 4 As shown, Figure 4 The embodiment of the present application does not limit the size of the insulating medium distribution area.

[0089] Preferably, the length of the insulating medium distributed on the z-axis can be greater than or equal to the length of the second component on the z-axis, and the length of the insulating medium distributed on the y-axis can be greater than or equal to the length of the second component on the y-axis, so that the second component is divided into two second sub-components that are insulated from each other. The two second sub-components can be respectively configured with two potential pins, so that the potentials of the two second sub-components can be independently controlled. In addition, the length a3 of the insulating medium on the x-axis can be set as needed.

[0090] In one embodiment, the second component includes at least two second sub-components, and the second sub-components are arranged at intervals.

[0091] The second region may be provided with a vacuum insulation region, such as Figure 5 As shown, Figure 5 The embodiment of the present application does not limit the size of the vacuum insulation region.

[0092] Preferably, the length of the vacuum insulation region on the y-axis may be greater than or equal to the length of the second component on the y-axis, and the length of the vacuum insulation region on the z-axis may be greater than or equal to the length of the second component on the z-axis, so that the second component as a whole is divided into two second subcomponents which are insulated from each other and spaced apart in physical space.

[0093] The two second sub-components can be respectively equipped with two potential pins, so that the potentials of the two second sub-components can be independently controlled. In addition, the length a3 of the vacuum insulation region on the x-axis can be set as required.

[0094] In one embodiment, the shape of the second component in a cross-sectional view of a transverse plane includes a winding portion, the winding portion is configured to be in a winding shape, and the transverse plane is a plane perpendicular to the emission direction of the electron beam.

[0095] When the shape of the second component in the cross-sectional view of the transverse plane includes a winding portion, the closed-loop current of the second component also flows in a winding manner. When the second component serves as an electron emitter in the cathode assembly, more electrons can be emitted, thereby increasing the current of the X-ray tube.

[0096] The above-mentioned circuitous portion may be in a circuitous shape, such as shown in Figure 6(a), Figure 6(b), Figure 6(c), Figure 6(d) and Figure 6(e). It should be noted that the shapes shown in Figure 6(a), Figure 6(b), Figure 6(c), Figure 6(d) and Figure 6(e) can be considered as schematic diagrams of partial shapes of the second component.

[0097] In one embodiment, there is a gap between the first component and the second component in the longitudinal direction, and the distance between the first component and the base in the longitudinal direction is smaller than the distance between the second component and the base in the longitudinal direction; the longitudinal direction is the emission direction of the electron beam.

[0098] Reference Figure 7 , Figure 7 It is a cross-sectional view of the zOx plane, and there is a gap b between the first component 101 and the second component 102 in the z-axis direction. A reference plane perpendicular to the z-axis direction can be set on the base. When the base surface is a plane perpendicular to the z-axis direction, the base surface can be used as the reference plane; when the base surface is not a plane perpendicular to the z-axis direction, a point can be taken on the base, and a plane passing through the point and perpendicular to the z-axis direction can be used as the reference plane.

[0099] The distance between the first component 101 and the base in the longitudinal direction may be the distance from the first component 101 to the reference plane along the longitudinal direction, and the distance between the second component 102 and the base in the longitudinal direction may be the distance from the second component 102 to the reference plane along the longitudinal direction; the distance from the first component 101 to the reference plane along the longitudinal direction is smaller than the distance from the second component 102 to the reference plane along the longitudinal direction.

[0100] The size of the gap b will affect the change of the electric field around the first component, thereby affecting the actual focus change. The size of the gap b can be between 0 mm and 10 mm so that the surfaces of the first component and the second component have substantially the same electric field strength. Figure 8 (a) and (b) in Figure 8 The gap b in (a) is larger than Figure 8 From the gap b in (b), it can be seen that the electric field around the first component changes. The smaller the gap b is, the closer the first component is to the upper surface of the gate, the electric field lines tend to be flat, the direction of electron movement is perpendicular to the direction of the electric field lines, and the component of the electric field force on the electrons at the edge of the upper surface of the first component along the surface direction of the first component is smaller, the focus tends to diverge, and the divergence angle of the electron beam emitted by the cathode assembly is larger.

[0101] In addition, the sizes of the gaps a11, a12, a21, and a22 will also affect the change of the electric field around the first component. The sizes of the gaps a11, a12, a21, and a22 can be between 0 mm and 1 mm. By adjusting the gaps a11, a12, a21, and a22, when the first component and the second component are both used as electron emitters in the cathode assembly, there can be no large overlap or gap between the focal points of the first component and the second component. Figure 8 If (a) and (c) in Figure 8 The gaps between (a) and (c) are a11 and a12, Figure 8 The gap a11 in (a) is larger than Figure 8 The gap a11 in (b) is Figure 8 The gap a12 in (a) is greater than Figure 8From the gap a12 in (b), it can be seen that the electric field lines around the first component change, the electric field changes, the smaller the gaps a11 and a12, the steeper the electric field lines, the direction of electron movement is perpendicular to the direction of the electric field lines, the component of the electric field force exerted on the electrons at the edge of the upper surface of the first component along the surface direction of the first component is larger, the focus tends to gather, and the divergence angle of the electron beam emitted by the cathode assembly is smaller.

[0102] Reference Figure 8 (d) in FIG. 1 is a simulation of the electric field around the first component when the gate control voltage is changed.

[0103] In one embodiment, the second component includes a proximal end and a distal end divided relative to the distance between the first component and the base, the second component is arranged on opposite sides of the outer circumference of the first component, and the distance between the oppositely arranged proximal ends is smaller than the distance between the oppositely arranged distal ends.

[0104] According to the distance relative to the first component and the distance relative to the base, the second component may include a proximal end and a distal end, and the end of the second component close to the first component and the base is called the proximal end, and the end of the second component far from the first component and the base is called the distal end. Thus, the distance between the proximal end and the first component is smaller than the distance between the distal end and the first component, and the distance between the proximal end and the base is smaller than the distance between the distal end and the base.

[0105] When the second component is arranged on the opposite side of the outer periphery of the first component, the proximal end of the second component is relatively arranged on both sides of the first component, and the distal end of the second component is relatively arranged on both sides of the first component, and the distance between the relatively arranged proximal ends is smaller than the distance between the relatively arranged distal ends.

[0106] When the proximal end and the distal end are regarded as one point, the proximal ends relatively arranged on both sides of the first component can be referred to as two proximal end points, and the distal ends relatively arranged on both sides of the first component can be referred to as two distal end points; Fig. 9 , x1 and x2 on the second component 102 are two distal end points disposed on both sides of the first component, and the distance between x1 and the base is the same as the distance between x2 and the base, and the distance between x1 and the first component 101 is the same as the distance between x2 and the first component 101. y1 and y2 on the second component 102 are two proximal end points disposed on both sides of the first component, and the distance between y1 and the base is the same as the distance between y2 and the base, and the distance between y1 and the first component 101 is the same as the distance between y2 and the first component 101. The distance between x1 and x2 is greater than the distance between y1 and y2.

[0107] The second component 102 can be shown in the cross-sectional view of the zOx plane. Fig. 9 The straight line shown can also be Fig.10In addition, in order to further increase the surface area of ​​the second component 102, the second component 102 can be in the cross-sectional view of the zOx plane. Fig.11 An "L" shape is shown.

[0108] Fig.11 In the "L" shape shown, the second component 102 includes two parts, one part as Fig. 9 As shown, the other part can be called a side, and the distance between the points on the side and the first component along the x-axis direction remains unchanged. Therefore, when determining the proximal end and the distal end on the second component, the side may not be taken into consideration.

[0109] In some embodiments, the second component may be located on one side of the first component in the cross-sectional view of 102 on the zOx plane. Fig. 9 The straight line shown, located on the other side of the first component can be Fig.10 In addition, the first component 101 can be shown in the cross-sectional view of the zOx plane. Fig. 9 The straight line shown or Fig.10 The curve shown.

[0110] The first component and the second component can be realized by a filament. The number of filaments can be single or multiple. When there are multiple filaments, the filaments can be connected in series or in parallel. The embodiment of the present application does not limit the number of filaments. The shape of the filament can be a flat filament, a spiral filament, or a curved filament. The embodiment of the present application does not limit the shape of the filament.

[0111] An embodiment of the present application also provides a control method for a cathode assembly, wherein the cathode assembly to be controlled is the cathode assembly of any of the above-mentioned embodiments, and the method can be executed by a computer device, and includes the following steps: controlling the potentials of different potential pins of the second component; if the potentials of all potential pins of the second component are the same, causing the second component to adjust the electron beam emitted by the second component to the first component; if the potentials of at least two pins of the second component are different, causing the second component to emit an electron beam.

[0112] Reference Figure 7 The first component may include two potential pins U11 and U12. The potentials of U11 and U12 are different. There is a voltage difference in the first component. The voltage difference may be a value ranging from a few tenths of a volt to tens of volts. When the voltage difference exists in the first component, there will be a closed-loop current. Under the action of the high voltage between the cathode assembly and the anode target surface, the electrons forming the closed-loop current will escape and be emitted toward the anode target surface.

[0113] When the second component includes two potential pins U21 and U22, if U21 and U22 are the same, the second component is a grid in the cathode assembly, which can adjust the electron beam emitted by the first component. If U21 and U22 are different, the second component is an electron emitter in the cathode assembly, which can emit an electron beam.

[0114] In one embodiment, when the second component includes at least two second sub-components, controlling the potentials of different potential pins of the second component includes: controlling the potentials of two potential pins of the same second sub-component; if the potentials of the two potential pins of one of the second sub-components are different and the potentials of the two potential pins of the other second sub-component are the same, causing one of the second sub-components to emit an electron beam, and causing the other second sub-component to adjust the electron beams emitted by the first component and one of the second sub-components.

[0115] Reference Fig.12 When the second component includes two second sub-components, one of the second sub-components has two potential pins U21 and U23, and the other second sub-component has two potential pins U22 and U24.

[0116] When U21 and U23 are the same (U21=U23), and U22 and U24 are the same (U22=U24), the two second subcomponents act as grids in the cathode assembly to adjust the electron beam emitted by the first component. In this case, U21=U23=V1, U22=U24=V2, where V1 and V2 may be equal or unequal.

[0117] When U21 and U23 are different (U21≠U23), and U22 and U24 are the same (U22=U24), the second subcomponent containing U21 and U23 can be used as an electron emitter in the cathode assembly to emit an electron beam, and the second subcomponent containing U22 and U24 can be used as a grid to adjust the electron beams emitted by the first component and another second subcomponent. In this case, U21=V1, U23=V2, U22=U24=V3 can be set, wherein V1 is not equal to V2, and V2 and V3 can be equal or unequal.

[0118] When U21 and U23 are different (U21≠U23), and U22 and U24 are different (U22≠U24), the two second subcomponents can act as electron emitters in the cathode assembly and emit electron beams. In this case, U21=V1, U23=V2, U22=V3, and U24=V4 can be set, wherein V1 is not equal to V2, and V3 is not equal to V4; whether V1 and V3 are equal and whether V1 and V4 are equal can be set according to actual conditions, and whether V2 and V3 are equal and whether V2 and V4 are equal can be set according to actual conditions.

[0119] Exemplarily, when the voltage difference between the cathode assembly and the anode target surface is 140 kV, if the potential of the anode target surface is +70 kV, then the potential of the cathode assembly is -70 kV. At this time, the potentials of U21, U22, U23 and U24 can be determined around -70 kV; if the potential of the anode target surface is 0 kV, then the potential of the cathode assembly is -140 kV. At this time, the potentials of U21, U22, U23 and U24 can be determined around -140 kV.

[0120] In one embodiment, the potential value of the potential pin of the second component can be switched according to a set frequency. The set frequency is not necessarily a fixed value. For example, the set frequency is aHz at the beginning, and the set frequency is bHz after 2 minutes. In one embodiment, the set frequency can be determined in real time according to the frequency change curve over time.

[0121] When the second component is a grid, if it is switched at a larger set frequency, the electron beam emitted by the first component can be quickly adjusted.

[0122] The present application also provides a control device for a cathode assembly, wherein the cathode assembly to be controlled is the cathode assembly of any of the above embodiments, and the device includes:

[0123] A potential control module, used for controlling the potentials of different potential pins of the second component;

[0124] If the potentials of all the potential pins of the second component are the same, causing the second component to adjust the electron beam emitted by the second component to the first component;

[0125] If the potentials of at least two pins of the second component are different, the second component is caused to emit an electron beam.

[0126] In one embodiment, the potential control module is also used to control the potential of two potential pins of the second sub-component; if the potentials of the two potential pins of one of the second sub-components are different and the potentials of the two potential pins of the other second sub-component are the same, one of the second sub-components is enabled to emit an electron beam, and the other second sub-component is enabled to adjust the electron beams emitted by the first component and one of the second sub-components.

[0127] In addition, if the potentials of the two potential pins of each second subcomponent are the same, each second subcomponent adjusts the electron beam emitted by the first component; if the potentials of the two potential pins of each second subcomponent are different, each second subcomponent emits an electron beam.

[0128] In one embodiment, the value of the potential is switched at a set frequency.

[0129] The specific definition of the control device of the cathode assembly can be found in the definition of the control method of the cathode assembly above, which will not be repeated here. Each module in the control device of the cathode assembly can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0130] The embodiment of the present application also provides an X-ray tube, which includes a cathode assembly as in any of the above embodiments. The X-ray tube may also include an anode target surface, and the voltage difference between the cathode assembly and the anode target surface may be recorded as NkV, where N may be set according to actual needs, such as setting N to 140. The X-ray tube may be bipolar, in which case, among the cathode assembly and the anode target surface, the potential of the anode target surface is positive, the potential of the cathode assembly is negative, and the potential difference between the anode target surface and the cathode assembly is NkV; the X-ray tube may also be unipolar, in which case, among the cathode assembly and the anode target surface, the potential of the anode target surface is 0, the potential of the cathode assembly is negative, and the potential difference between the anode target surface and the cathode assembly is NkV.

[0131] The present application also provides a computer device, whose internal structure diagram can be as follows: Fig.16 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store control data of the cathode assembly. The network interface of the computer device is used to communicate with an external terminal through a network connection. The computer device also includes an input and output interface, which is a connection circuit for exchanging information between the processor and the external device. They are connected to the processor through a bus, referred to as an I / O interface. When the computer program is executed by the processor, a control method for a cathode assembly is implemented.

[0132] Those skilled in the art will understand that Fig.16 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0133] An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0134] An embodiment of the present application further provides a computer program product, on which a computer program is stored, and the computer program is used by a processor to execute the steps in the above-mentioned various method embodiments.

[0135] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the above-mentioned computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0136] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A cathode assembly, characterized in that: The cathode assembly comprises: A first component is arranged on a base, wherein the first component has a function of emitting an electron beam; A second component is arranged on the base, the second component is arranged on the periphery of the first component, the first component and the second component are insulated, and the second component has a function of adjusting the electron beam emitted by the first component; The second component is provided with at least two potential pins, and the second component contains electron beam emitting material.

2. The cathode assembly according to claim 1, characterized in that The second component is located on at least two sides of the outer circumference of the first component.

3. The cathode assembly according to claim 1, characterized in that The second component is disposed around the outer circumference of the first component.

4. The cathode assembly according to claim 2 or 3, characterized in that: There is a gap between the second component and the first component in a transverse plane, and the transverse plane is a plane perpendicular to the emission direction of the electron beam; A difference between a gap between the second component and the first side of the first component on the transverse plane and a gap between the second component and the second side of the first component on the transverse plane is within a set range; the second side is an opposite side to the first side.

5. The cathode assembly according to claim 3, characterized in that The second component is entirely disposed around the first component.

6. The cathode assembly according to claim 5, characterized in that The second component as a whole comprises an insulating medium, and the insulating medium divides the second component as a whole into at least two second sub-components that can be controlled independently.

7. The cathode assembly according to claim 3, characterized in that The second component includes at least two second sub-components, and the second sub-components are arranged at intervals.

8. The cathode assembly according to claim 1, characterized in that The shape of the second member in a cross-sectional view of a transverse plane includes a winding portion, and the winding portion is provided in a winding shape. The transverse plane is a plane perpendicular to the emission direction of the electron beam.

9. The cathode assembly according to claim 1, characterized in that There is a gap between the first component and the second component in the longitudinal direction, and the distance between the first component and the base in the longitudinal direction is smaller than the distance between the second component and the base in the longitudinal direction; the longitudinal direction is the emission direction of the electron beam.

10. The cathode assembly according to claim 1, characterized in that The second component includes a proximal end and a distal end divided relative to the distance between the first component and the base. The second component is arranged on opposite sides of the outer circumference of the first component, and the distance between the oppositely arranged proximal ends is smaller than the distance between the oppositely arranged distal ends.

11. A method for controlling a cathode assembly, characterized in that: The cathode assembly to be controlled is the cathode assembly according to any one of claims 1 to 10, and the method comprises: controlling the potentials of the different potential pins of the second component; If the potentials of all the potential pins of the second component are the same, causing the second component to adjust the electron beam emitted by the second component to the first component; If the potentials of at least two pins of the second component are different, the second component is caused to emit an electron beam.

12. The method according to claim 11, characterized in that When the second component includes at least two second sub-components, controlling the potentials of different potential pins of the second component includes: controlling the potentials of two potential pins of the second subcomponent; If the potentials of the two potential pins of one of the second subcomponents are different and the potentials of the two potential pins of the other second subcomponents are the same, one of the second subcomponents is made to emit an electron beam, and the other second subcomponent is made to adjust the electron beams emitted by the first component and one of the second subcomponents.

13. The method according to claim 11 or 12, characterized in that: The value of the potential is switched at a set frequency.

14. An X-ray tube, characterized in that: The X-ray tube comprises a cathode assembly as claimed in any one of claims 1 to 10.

Images