CN111211027A - Plane irradiation X-ray light source and irradiation equipment - Google Patents
Plane irradiation X-ray light source and irradiation equipment Download PDFInfo
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- CN111211027A CN111211027A CN202010048182.5A CN202010048182A CN111211027A CN 111211027 A CN111211027 A CN 111211027A CN 202010048182 A CN202010048182 A CN 202010048182A CN 111211027 A CN111211027 A CN 111211027A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
Abstract
The embodiment of the invention provides a plane irradiation X-ray light source and irradiation equipment, wherein the plane irradiation X-ray light source comprises: the cathode structure comprises a linear cathode structure and an anode target sheet assembly, wherein the linear cathode structure is symmetrically arranged, and the anode target sheet assembly is arranged opposite to the linear cathode structure; and a focusing electrode assembly is arranged between the linear cathode structure and the anode target assembly, and the linear cathode structure emits electron beams, and the electron beams are focused by the focusing electrode assembly and then enter the anode target assembly, so that a linear focus is generated on the anode target assembly. According to the embodiment of the invention, the linear cathode structures which are symmetrically arranged are adopted, so that irradiation fields generated by the two linear cathode structures can be mutually overlapped, a region with a relatively uniform dose field can be formed, and the defect that the dosage utilization rate of X-rays is reduced due to the adoption of a filter or the zooming of the irradiation distance can be avoided. Therefore, the embodiment of the invention can improve the uniformity of the irradiation area, improve the irradiation efficiency and reduce the cost of the light source.
Description
Technical Field
The invention relates to the technical field of X rays, in particular to a plane irradiation X ray light source and irradiation equipment.
Background
The X-ray has wide application in the fields of blood irradiation, food sterilization, material modification, insect sterilization and the like. In blood irradiation, X-rays pass through nucleated cells, damage DNA and interfere with the repair process of the nucleated cells, can reduce the activity of lymphocytes and stop growing, thereby preventing transfusion-associated graft-versus-host disease (TA-GVHD); the food sterilization utilizes X-rays to damage bacteria so as to kill the bacteria and achieve the effect of sterilization treatment; in the material modification, the materials of the tire and the film are irradiated by X rays, so that the internal structure of the material is improved, and the performance of the material is improved.
The irradiation source has significant requirements on the uniformity of the source dose within the irradiation region, for example, for blood irradiation, the dose non-uniformity is typically ≦ 1.4 (maximum dose divided by minimum dose in the irradiation field). Most of the existing X-ray irradiation light sources use the existing X-ray tube to irradiate the irradiated object. Because the focus of the X-ray tube is small, the output dose has obvious angle distribution, in order to meet the uniformity of an irradiation region, the distance between an irradiation light source and an irradiated object can be increased, or a filter is added near a light source beam outlet window to filter the dose of a high dose region, so that the requirement of dose uniformity is met. Both of the above methods reduce the utilization efficiency of the X-ray output dose to different degrees, and a more powerful X-ray tube is required to obtain an irradiation dose satisfying the use requirement.
Therefore, the X-ray dose utilization rate is reduced by adopting a filter or a mode of pulling the irradiation distance far.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a planar irradiation X-ray light source and irradiation equipment.
In a first aspect, an embodiment of the present invention provides a planar irradiation X-ray light source, including:
the linear cathode structure and the anode target sheet component are arranged opposite to the linear cathode structure;
and a focusing electrode assembly is arranged between the linear cathode structure and the anode target assembly, and the linear cathode structure emits electron beams, and the electron beams are focused by the focusing electrode assembly and then enter the anode target assembly, so that a linear focus is generated on the anode target assembly.
Further, the linear cathode structure is a linear cathode structure made of a preset cathode material;
or the linear cathode structure is a linear cathode structure made of a preset cathode material containing a coating;
or the linear cathode structure is a spiral linear cathode structure made of a preset cathode material;
or the linear cathode structure is a spiral linear cathode structure made of a preset cathode material containing a coating.
Further, the anode target assembly comprises a plurality of target structures which are sequentially distributed.
Further, the plane irradiation X-ray light source further includes: the grid structure is arranged in the direction of the cathode emission end and is separated from the cathode emission end by a preset distance, the grid structure is used for adjusting the electric field distribution between the cathode and the anode and controlling whether the cathode emits the electron beams or not, and when the grid voltage is positive, the cathode emits the electron beams; when the grid voltage is negative, the cathode is cut off and does not emit electron beams, so as to rapidly control the on and off of the light source.
In a second aspect, an embodiment of the present invention provides a planar irradiation X-ray light source, including:
a first linear cathode structure, a second linear cathode structure, a first anode target assembly and a second anode target assembly;
the first linear cathode structure and the second linear cathode structure are oppositely arranged, and the first anode target assembly and the second anode target assembly are positioned between the first linear cathode structure and the second linear cathode structure; the first linear cathode structure is arranged opposite to the first anode target assembly, and the second linear cathode structure is arranged opposite to the second anode target assembly; the first anode target assembly and the second anode target assembly respectively comprise a plurality of anode targets which are sequentially distributed;
a first focusing electrode assembly is arranged between the first linear cathode structure and the first anode target assembly, and the electron beams emitted by the first linear cathode structure are focused by the first focusing electrode assembly and then are incident on the corresponding first anode target assembly, so that a first linear focus is generated on the first anode target assembly; and a second focusing electrode assembly is arranged between the second linear cathode structure and the second anode target assembly, and the second linear cathode structure emits electron beams, and the electron beams are focused by the second focusing electrode assembly and then are incident on the corresponding second anode target assembly, so that a second linear focus is generated on the second anode target assembly.
Further, the first linear cathode structure and the second linear cathode structure are both linear cathode structures made of preset cathode materials;
or the first linear cathode structure and the second linear cathode structure are both linear cathode structures made of preset cathode materials containing coatings;
or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials;
or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials containing coatings.
Further, the first anode target assembly and the second anode target assembly each comprise a plurality of anode targets arranged and distributed in sequence.
In a third aspect, an embodiment of the present invention provides a planar irradiation X-ray light source, including:
the anode target sheet assembly is positioned at the symmetrical center of the plurality of cathodes; the anode target assembly comprises a plurality of anode targets, and the anode targets are respectively arranged in one-to-one correspondence with the cathodes; focusing electrodes are arranged between each cathode and the corresponding anode target, and electron beams emitted by each cathode are focused by the corresponding focusing electrode and then are incident on the corresponding anode target, so that a focus is generated on the corresponding anode target.
Furthermore, one or more than one cathode is arranged on any one side of the diamond.
In a fourth aspect, an embodiment of the present invention provides an irradiation apparatus, including the planar irradiation X-ray light source according to any one of the first to third aspects.
According to the technical scheme, the planar irradiation X-ray light source and the irradiation equipment provided by the embodiment of the invention have the advantages that the irradiation fields generated by the linear cathode structures are mutually overlapped due to the adoption of the opposite linear cathode structures, so that an area with a relatively uniform dose field can be formed, and the defect that the X-ray dose utilization rate is reduced due to the adoption of a filter or the adoption of a remote irradiation distance can be avoided. Therefore, the embodiment of the invention can improve the uniformity of the irradiation area, improve the irradiation efficiency and reduce the cost of the light source.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a planar irradiation X-ray light source according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the distribution of the radiation dose of a single point light source in the direction X, Y when the anode target is tilted by 12 degrees;
FIG. 3 is a schematic diagram showing the dose distribution after two point light sources are superimposed in the X direction;
FIG. 4 is a schematic diagram showing the dose distribution after superposition of two point light sources in the Y direction;
FIG. 5 is a schematic structural diagram of a planar irradiation X-ray source according to another embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a planar irradiation X-ray light source according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a planar irradiation X-ray light source according to still another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram illustrating a planar irradiation X-ray light source according to an embodiment of the present invention. As shown in fig. 1, the present embodiment provides a planar irradiation X-ray light source, including: the linear cathode structure and the anode target sheet component are arranged opposite to the linear cathode structure;
and a focusing electrode assembly is arranged between the linear cathode structure and the anode target assembly, and the linear cathode structure emits electron beams, and the electron beams are focused by the focusing electrode assembly and then enter the anode target assembly, so that a linear focus is generated on the anode target assembly.
In this embodiment, it should be noted that, during operation, the anode is at a positive high voltage (80-300 kV), the cathode is at the ground potential, or the cathode is at a negative high voltage (-80 kV-300 kV), and the anode is at the ground potential. The electron beam emitted by the cathode drifts towards the anode and finally interacts with the anode target to generate bremsstrahlung X-rays.
Before describing the planar irradiation X-ray light source provided in this embodiment, the background of the present invention will be explained. Assuming that the system employs a reflective anode target, for an X-ray point source with only one focal point, the source of the configuration is not uniform in angular distribution. Fig. 2 shows the dose distribution at an anode target tilt angle of 12 deg., the distribution being symmetrical in the X-direction and asymmetrical in the Y-direction, as a function of the anode target tilt angle. In any case, the dose distribution in both directions is not uniform, resulting in difficulty in meeting the usage requirements for dose uniformity within the irradiated region. If a plurality of point light sources are mutually overlapped, more uniform dose field distribution can be obtained on the irradiation field. Fig. 3 shows the distribution of the dose field after the two point light sources are superimposed in the X direction, and it can be seen from the figure that if there is only one point light source, the area satisfying the requirement of uniformity 1.4 on the plane 36cm away from the focal point is only about 36cm, and if two point light sources are superimposed, the irradiation area in the X direction can be increased to 120 cm. Meanwhile, the dosage is improved to a certain degree, and the irradiation efficiency is improved by more than 3.33 times. Similarly, if there is only one point light source in the Y direction, the area satisfying the requirement of uniformity 1.4 on the plane 36cm from the focal point height is only 28cm, and if two point light sources are superimposed, the irradiation area in the Y direction can be increased to 64 cm. Meanwhile, the dose is improved to a certain extent, and the irradiation efficiency is improved by more than 2.29 times, which is shown in fig. 4. It can be seen that if a four-point source irradiation light source is designed by using 2X 2 cathodes, the irradiation efficiency in the X direction and the Y direction is improved by more than 3.33 times and 2.3 times, the total efficiency is improved by more than 7.7 times, and the power of the light source is increased from one to 4, which is only improved by 4 times. Therefore, the efficiency of the irradiation light source can be improved by adopting the technology of mutually overlapping the dosage fields of the plurality of point light sources.
Based on the above principle analysis, if the cathode light source is set to be a linear cathode structure, a linear focus can be generated, so that a relatively uniform region of a dose field can be formed, the uniformity of an irradiation region is improved, the defect that the dosage utilization rate of X-rays is reduced due to the adoption of a filter or the adoption of a remote irradiation distance is avoided, the irradiation efficiency is improved, and the light source cost is reduced. Therefore, based on this principle, the present embodiment provides a planar irradiation X-ray light source, including: the linear cathode structure and the anode target sheet component are arranged opposite to the linear cathode structure; and a focusing electrode assembly is arranged between the linear cathode structure and the anode target assembly, and the linear cathode structure emits electron beams, and the electron beams are focused by the focusing electrode assembly and then enter the anode target assembly, so that a linear focus is generated on the anode target assembly.
In this embodiment, the linear cathode structure may be a linear cathode structure made of a predetermined cathode material, or the linear cathode structure may be a linear cathode structure made of a predetermined cathode material containing a coating, or the linear cathode structure may be a spiral cathode structure made of a predetermined cathode material containing a coating. The predetermined cathode material may be tungsten wire, iridium wire or other materials.
In this embodiment, it should be noted that the linear cathode structure made of the predetermined cathode material with the coating can increase the emission current energy and reduce the cathode operating temperature.
In this embodiment, it should be noted that, compared to a straight cathode structure, a spiral cathode structure emits more current energy, so that it can further assist to improve uniformity of an irradiation region and improve irradiation efficiency.
In this embodiment, the anode target assembly includes a plurality of anode targets arranged in sequence, and during actual operation, the electron beam emitted from the linear cathode structure drifts toward the anode and finally interacts with the anode targets to generate bremsstrahlung X-rays. The cathode of the embodiment adopts the linear cathode structure, so that irradiation fields generated by the linear cathode structure are mutually overlapped, a relatively uniform region of a dose field can be formed, and the defect that the X-ray dose utilization rate is reduced by adopting a filter or zooming out the irradiation distance can be avoided. Therefore, the embodiment of the invention can improve the uniformity of the irradiation area, improve the irradiation efficiency and reduce the cost of the light source.
Based on the content of the foregoing embodiment, in this embodiment, the planar irradiation X-ray light source further includes: the grid structure (optional) is arranged in the direction of the cathode emission end and is separated from the cathode emission end by a preset distance, the grid structure is used for adjusting the point distribution before the anode and the cathode on one hand, and is used for controlling whether the cathode emits the electron beam or not on the other hand, and when the grid voltage is positive, the cathode emits the electron beam; when the grid voltage is negative, the cathode is cut off, no electron beam is emitted, and the light source is rapidly controlled to be turned on and off. For example, the anode is in a high voltage state of 80kV to 300kV, the cathode and the focusing electrode are in zero potential, the grid structure is in a negative voltage state at ordinary times, a pulse positive voltage is supplied to the grid structure during work, electrons of the cathode drift to the anode under the traction of the grid voltage, and finally interact with the anode to generate X rays.
Based on the same inventive concept, fig. 5 shows a schematic structural diagram of a plane irradiation X-ray light source provided by another embodiment of the present invention. As shown in fig. 5, the present embodiment provides a planar irradiation X-ray light source, including:
a first linear cathode structure, a second linear cathode structure, a first anode target assembly and a second anode target assembly;
the first linear cathode structure and the second linear cathode structure are oppositely arranged, and the first anode target assembly and the second anode target assembly are positioned between the first linear cathode structure and the second linear cathode structure; the first linear cathode structure is arranged opposite to the first anode target assembly, and the second linear cathode structure is arranged opposite to the second anode target assembly; the first anode target assembly and the second anode target assembly respectively comprise a plurality of anode targets which are sequentially distributed;
a first focusing electrode assembly is arranged between the first linear cathode structure and the first anode target assembly, and the electron beams emitted by the first linear cathode structure are focused by the first focusing electrode assembly and then are incident on the corresponding first anode target assembly, so that a first linear focus is generated on the first anode target assembly; and a second focusing electrode assembly is arranged between the second linear cathode structure and the second anode target assembly, and the second linear cathode structure emits electron beams, and the electron beams are focused by the second focusing electrode assembly and then are incident on the corresponding second anode target assembly, so that a second linear focus is generated on the second anode target assembly.
Based on the content of the above embodiments, in the present embodiment, the first linear cathode structure and the second linear cathode structure are both linear cathode structures made of a predetermined cathode material; or the first linear cathode structure and the second linear cathode structure are both linear cathode structures made of preset cathode materials containing coatings; or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials; or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials containing coatings. For example, the predetermined cathode material may be tungsten wire, iridium wire or other cathode materials.
In this embodiment, it should be noted that the linear cathode structure made of the predetermined cathode material with the coating can increase the emission current energy and reduce the cathode operating temperature.
In this embodiment, it should be noted that, compared to a straight cathode structure, a spiral cathode structure emits more current energy, so that it can further assist to improve uniformity of an irradiation region and improve irradiation efficiency.
Based on the content of the above embodiments, in the present embodiment, each of the first anode target assembly and the second anode target assembly includes a plurality of anode targets arranged and distributed in sequence.
In the present embodiment, the same inventive concept as that of the above embodiments is that the linear cathode structures are adopted, so that irradiation fields generated by the linear cathode structures are mutually overlapped, and a region with a relatively uniform dose field is formed. Unlike the above embodiments, in this embodiment, there are two oppositely disposed cathode structures and anode target assemblies. As shown in fig. 5, the planar irradiation X-ray light source provided by this embodiment belongs to a dual-column line emission cathode irradiation light source, and compared with the single-column line emission cathode irradiation light source shown in fig. 1, the planar irradiation X-ray light source provided by this embodiment has the advantages of more uniform irradiation, larger irradiation area and higher efficiency.
In this embodiment, it should be noted that the difference between the dual-column line-emission cathode irradiation light source provided in this embodiment and the single-column line-emission cathode irradiation light source provided in the foregoing embodiment is mainly described in this embodiment, and two specific descriptions of common features may be included in the description of the foregoing embodiment, and are not described again in this embodiment.
According to the technical scheme, the planar irradiation X-ray light source provided by the embodiment of the invention adopts the linear cathode structure, so that irradiation fields generated by the linear cathode structure can be mutually overlapped, a region with a relatively uniform dose field can be formed, and the defect that the X-ray dose utilization rate is reduced by adopting a filter or increasing the irradiation distance can be avoided. Therefore, the embodiment of the invention can improve the uniformity of the irradiation area, improve the irradiation efficiency and reduce the cost of the light source.
Based on the same inventive concept, fig. 6 shows a schematic structural diagram of a plane irradiation X-ray light source provided by another embodiment of the present invention. As shown in fig. 6, the present embodiment provides a planar irradiation X-ray light source, including:
the anode target sheet assembly is positioned at the symmetrical center of the plurality of cathodes; the anode target assembly comprises a plurality of anode targets, and the anode targets are respectively arranged in one-to-one correspondence with the cathodes; focusing electrodes are arranged between each cathode and the corresponding anode target, and electron beams emitted by each cathode are focused by the corresponding focusing electrode and then are incident on the corresponding anode target, so that a focus is generated on the corresponding anode target.
In this embodiment, it should be noted that the grid in fig. 6 is not necessary, and in practical use, the cathode emission may be controlled by controlling the filament heating power without using the grid electrode.
According to principle analysis of the foregoing embodiment, it can be seen that a plurality of rhombic cathodes are disposed in a vacuum chamber, when the vacuum chamber is in operation, each cathode emits an electron beam to strike a different position on an anode target, a plurality of X-ray point sources are obtained on the anode, dose fields generated by the X-ray point sources are mutually superposed to form a relatively uniform region, and thus, the uniformity requirement of a subject can be met when the distance between the radiation source and the subject is short and no filter is used.
Based on the content of the above embodiments, in the present embodiment, as shown in fig. 7, one or more cathodes may be disposed on any one side of the diamond. Fig. 7 illustrates an example in which two cathodes may be disposed on any one side of the diamond. In addition, three, four or other number of cathodes may be disposed on any one side of the diamond shape according to the requirement, which is not limited in this embodiment.
According to the planar irradiation X-ray light source provided by the embodiment of the invention, as the plurality of cathode structures distributed in the diamond shape are adopted, irradiation visual fields generated by the linear cathode structures can be mutually overlapped, so that an area with a relatively uniform dose field can be formed, and the defect that the X-ray dose utilization rate is reduced due to the adoption of a filter or the adoption of a long irradiation distance can be avoided. Therefore, the embodiment of the invention can improve the uniformity of the irradiation area, improve the irradiation efficiency and reduce the cost of the light source.
Based on the content of the foregoing embodiment, in this embodiment, the planar irradiation X-ray light source further includes: the grid structure (optional) is arranged in the direction of the cathode emission end and is separated from the cathode emission end by a preset distance, the grid structure is used for controlling whether the cathode emits the electron beam or not, and when the grid voltage is positive, the cathode emits the electron beam; when the grid voltage is negative, the cathode is turned off and no electron beam is emitted. For example, the anode is in a high voltage state of 80kV to 300kV, the cathode and the focusing electrode are in zero potential, the grid structure is in a negative voltage state at ordinary times, a pulse positive voltage is supplied to the grid structure during work, electrons of the cathode drift to the anode under the traction of the grid voltage, and finally interact with the anode to generate X rays.
In this embodiment, it should be noted that the cathode may be a circular or rectangular barium-tungsten cathode, and the focusing electrode may be a circular, oval or square hole electrode. The cathode and the focusing electrode are both at zero potential, the grid is used for controlling cathode emission, the grid is in a negative voltage state at ordinary times, and when electrons need to be emitted, a positive pulse is given to the grid, and the electrons are led out from the cathode. The anode is at a high voltage of 80-300 kV, electrons led out from the cathode are focused by the focusing electrode and then interact with the anode, and finally X rays are generated.
Another embodiment of the present invention provides an irradiation apparatus including the planar irradiation X-ray light source as provided in the above embodiment.
Since the irradiation device provided by this embodiment includes the planar irradiation X-ray light source provided by the above embodiment, the irradiation device provided by this embodiment has similar beneficial effects to those of the above embodiment, and therefore, details are not repeated here.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A planar irradiation X-ray light source comprising:
the linear cathode structure and the anode target sheet component are arranged opposite to the linear cathode structure;
and a focusing electrode assembly is arranged between the linear cathode structure and the anode target assembly, and the linear cathode structure emits electron beams, and the electron beams are focused by the focusing electrode assembly and then enter the anode target assembly, so that a linear focus is generated on the anode target assembly.
2. The planar irradiation X-ray light source according to claim 1, wherein the linear cathode structure is a linear cathode structure made of a predetermined cathode material;
or the linear cathode structure is a linear cathode structure made of a preset cathode material containing a coating;
or the linear cathode structure is a spiral linear cathode structure made of a preset cathode material;
or the linear cathode structure is a spiral linear cathode structure made of a preset cathode material containing a coating.
3. The source of claim 1, wherein the anode target assembly comprises a plurality of target structures arranged in sequence.
4. The plane irradiation X-ray light source according to claim 1, further comprising: the grid structure is arranged in the direction of the cathode emission end and is separated from the cathode emission end by a preset distance, the grid structure is used for adjusting the electric field distribution between the cathode and the anode and controlling whether the cathode emits the electron beams or not, and when the grid voltage is positive, the cathode emits the electron beams; when the grid voltage is negative, the cathode is cut off and does not emit electron beams, so as to rapidly control the on and off of the light source.
5. A planar irradiation X-ray light source comprising:
a first linear cathode structure, a second linear cathode structure, a first anode target assembly and a second anode target assembly;
the first linear cathode structure and the second linear cathode structure are oppositely arranged, and the first anode target assembly and the second anode target assembly are positioned between the first linear cathode structure and the second linear cathode structure; the first linear cathode structure is arranged opposite to the first anode target assembly, and the second linear cathode structure is arranged opposite to the second anode target assembly; the first anode target assembly and the second anode target assembly respectively comprise a plurality of anode targets which are sequentially distributed;
a first focusing electrode assembly is arranged between the first linear cathode structure and the first anode target assembly, and the electron beams emitted by the first linear cathode structure are focused by the first focusing electrode assembly and then are incident on the corresponding first anode target assembly, so that a first linear focus is generated on the first anode target assembly; and a second focusing electrode assembly is arranged between the second linear cathode structure and the second anode target assembly, and the second linear cathode structure emits electron beams, and the electron beams are focused by the second focusing electrode assembly and then are incident on the corresponding second anode target assembly, so that a second linear focus is generated on the second anode target assembly.
6. The planar irradiation X-ray light source of claim 5, wherein the first and second linear cathode structures are both linear cathode structures made of a predetermined cathode material;
or the first linear cathode structure and the second linear cathode structure are both linear cathode structures made of preset cathode materials containing coatings;
or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials;
or the first linear cathode structure and the second linear cathode structure are both spiral linear cathode structures made of preset cathode materials containing coatings.
7. The planar irradiation X-ray light source of claim 5, wherein the first anode target assembly and the second anode target assembly each comprise a plurality of anode targets arranged in a sequential arrangement.
8. A planar irradiation X-ray light source comprising:
the anode target sheet assembly is positioned at the symmetrical center of the plurality of cathodes; the anode target assembly comprises a plurality of anode targets, and the anode targets are respectively arranged in one-to-one correspondence with the cathodes; focusing electrodes are arranged between each cathode and the corresponding anode target, and electron beams emitted by each cathode are focused by the corresponding focusing electrode and then are incident on the corresponding anode target, so that a focus is generated on the corresponding anode target.
9. The plane irradiation X-ray source of claim 8, wherein one or more cathodes are disposed on any side of the diamond.
10. An irradiation apparatus comprising the plane irradiation X-ray light source as set forth in any one of claims 1 to 9.
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| CN115038226A (en) * | 2022-01-07 | 2022-09-09 | 江苏省农业科学院 | X-ray device for inducing insect sterility |
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| CN107481912A (en) * | 2017-09-18 | 2017-12-15 | 同方威视技术股份有限公司 | Plate target, ray source, ct apparatus and imaging method |
| CN207165514U (en) * | 2017-09-18 | 2018-03-30 | 同方威视技术股份有限公司 | Distributed X-ray source and CT equipment |
| CN209087760U (en) * | 2018-09-30 | 2019-07-09 | 汕头高新区聚德医疗科技有限公司 | A kind of CT tube filament with lead |
| CN110911258A (en) * | 2019-11-29 | 2020-03-24 | 清华大学 | Distributed multi-focus pulse X-ray tube and CT (computed tomography) equipment |
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| CN115038226A (en) * | 2022-01-07 | 2022-09-09 | 江苏省农业科学院 | X-ray device for inducing insect sterility |
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