CN211457490U - Rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerator - Google Patents
Rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerator Download PDFInfo
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- CN211457490U CN211457490U CN201922198032.8U CN201922198032U CN211457490U CN 211457490 U CN211457490 U CN 211457490U CN 201922198032 U CN201922198032 U CN 201922198032U CN 211457490 U CN211457490 U CN 211457490U
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Abstract
The utility model discloses a rotary liquid-cooled X-ray transmission conversion target for a high-power electronic accelerator, which comprises a vacuum cavity, a rotary target and a bearing component; the rotating target is arranged on the bearing assembly, and is driven by the bearing assembly to do high-speed rotating motion in the vacuum cavity; injecting electron beams output from an accelerator along a beam pipeline, bombarding the outer edge of the surface of a rotating target after passing through an electron transmission window, converting partial energy into X rays, emitting the X rays to a working area through an X ray output window, and depositing the residual energy to an annular area on the outer edge of the rotating target in the form of heat through the high-speed rotation of the rotating target; the vacuum cavity is provided with a cooling liquid inlet and a cooling liquid outlet, and cooling liquid flows into the vacuum cavity through the cooling liquid inlet, exchanges heat with the rotating target rotating at a high speed and then flows out of the cooling liquid outlet. The utility model discloses a mode that high-speed rotation and cooling combine, greatly reduced the regional temperature of electron beam bombardment, avoid the conversion target to ablate and damage.
Description
Technical Field
The utility model relates to a particle accelerator technical field, concretely relates to high-power electron accelerator is with rotation type liquid cooling X ray transmission conversion target.
Background
An electron accelerator is a device for generating X-rays, and is one of the most important components for industrial irradiation, radiotherapy, security imaging, and the like. After the electron accelerator accelerates the electrons to a certain energy (0.6-25MeV), the electrons bombard the target material and generate X rays by the principle of bremsstrahlung. The performance of the target determines the conversion efficiency, the energy spectrum and the power that can be tolerated for the X-rays.
Currently, X-ray conversion targets adopted by electron accelerators are generally fixed, and for accelerators for imaging, an X-ray focal spot is required to be fixed, so that an electron beam must bombard a fixed position on a target surface. When the power of the electron beam is high, the temperature of the target surface is increased sharply, so that the target surface is ablated and even leaks are formed, the vacuum damage of the accelerator is caused, and the power of the accelerator is severely limited by the performance of the target.
SUMMERY OF THE UTILITY MODEL
In order to solve under the very big condition of accelerator output electron beam power density, current fixed X ray conversion target causes the technical problem of target surface ablation damage, the utility model provides a solve the rotation type liquid cooling X ray transmission conversion target for high-power electron accelerator of above-mentioned problem. The utility model discloses a mode that high-speed rotation and cooling combine, greatly reduced the regional temperature of electron beam bombardment, avoid the conversion target to ablate and damage.
The utility model discloses a following technical scheme realizes:
a rotary liquid-cooled X-ray transmission conversion target for a high-power electronic accelerator comprises a vacuum cavity, a rotary target and a bearing assembly; the rotating target is arranged on the bearing assembly, and the bearing assembly drives the rotating target to do high-speed rotating motion in the vacuum cavity; injecting electron beams output from an accelerator along a beam pipeline, bombarding the outer edge of the surface of a rotating target after passing through an electron transmission window, converting partial energy into X rays, emitting the X rays to a working area through an X ray output window, and depositing the residual energy to an annular area on the outer edge of the rotating target in the form of heat through the high-speed rotation of the rotating target; the vacuum cavity is provided with a cooling liquid inlet and a cooling liquid outlet, and cooling liquid flows into the vacuum cavity through the cooling liquid inlet, exchanges heat with the rotating target rotating at a high speed and then flows out of the cooling liquid outlet.
Preferably, the utility model discloses a rotatory target outer fringe, the regional target thickness of electron beam bombardment is 0.5~5mm promptly.
Preferably, in order to further reduce the temperature of rotatory target, improve the cooling effect, the utility model discloses a plane, curved surface or slot structure are processed into to the target surface of rotatory target, through the high-speed rotation of rotatory target, realize with the high-efficient convection current of coolant liquid.
Preferably, the whole target material of the rotary target of the present invention is molybdenum, tungsten, rhenium, tantalum or rhenium-tungsten alloy.
Preferably, the utility model discloses a rotatory target adopts combination welding formula structure, the central base member of rotatory target adopts stainless steel, nickel, copper and copper alloy material, the outer fringe of rotatory target, electron beam bombardment region adopts molybdenum, tungsten, rhenium, tantalum or rhenium tungsten alloy material promptly.
Preferably, the utility model discloses coolant liquid entry and coolant liquid export are followed circular vacuum cavity's tangential opening, and are located vacuum cavity's upper and lower both sides respectively. The utility model discloses an above-mentioned setting for coolant liquid flow direction is unanimous with the direction of rotation, avoids the coolant liquid to cause great impact to the rotatory target of high-speed rotation.
Preferably, the cooling liquid inlet and the cooling liquid outlet of the present invention are angular openings with respect to the tangential direction of the circular vacuum chamber.
Preferably, the utility model adopts diamond or beryllium vacuum sealed with metal as the X-ray output window and the electron transmission window.
Preferably, the utility model discloses a bearing assembly adopts ball bearing, through the outside drive coil drive of vacuum cavity to it is high-speed rotatory to drive rotatory target.
Preferably, the cooling liquid of the present invention is transformer oil, but is not limited thereto.
The utility model discloses have following advantage and beneficial effect:
1. the utility model discloses a mode of high-speed rotation under the condition that does not change electron beam bombardment position, disperses the deposited power of electron beam to the great region of target surface rapidly, the compulsory heat exchange between rethread cooling liquid and the high-speed rotatory target to reduce the regional temperature of electron beam bombardment, avoid the conversion target to ablate and damage.
2. The utility model discloses a high-speed rotation of target for the electron beam power deposit of fixed position compares fixed target single-point deposition region in an annular region, greatly reduced the temperature of average power density and target, with the direct and coolant liquid contact of high-speed rotatory target high temperature part simultaneously, the heat dissipation rate greatly increased.
3. The utility model discloses a liquid cooling rotation type X ray transmission conversion target can reduce the highest temperature of target surface several times, and the radiating rate improves tens of times. The technology greatly improves the upper limit of the power density of the electron beam of the accelerator and improves the use efficiency or imaging performance of equipment. The specific values depend on the electron beam parameters used, the design of the rotary target system structure and material selection, and the target rotation speed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural view of the conversion target of the present invention.
Fig. 2 is a schematic view of a structure of a rotary target surface according to a first embodiment of the present invention.
Fig. 3 is a schematic view of a rotary target surface according to a second embodiment of the present invention.
Fig. 4 is a schematic view of a third embodiment of the present invention showing a rotary target surface structure.
Fig. 5 is a schematic view showing the positions of the coolant inlet and the coolant outlet according to the first embodiment of the present invention.
Fig. 6 is a schematic diagram showing the positions of the coolant inlet and the coolant outlet according to the second embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
the device comprises a vacuum cavity 1, a cooling liquid inlet 1-1, a cooling liquid outlet 1-2, a cooling liquid circulating track 1-3, a rotating target 2, a bearing assembly 3-1, a bearing rotor 3-2, a bearing driving sleeve 3-3, a bearing stator 4-electron beams 5-electron transmission windows 6-X rays 7-X rays output windows 8-driving coils 9-beam flow pipelines and cooling liquid 10.
Detailed Description
Hereinafter, the terms "include" or "may include" used in various embodiments of the present invention indicate the existence of the functions, operations or elements of the present invention, and do not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.
In various embodiments of the present invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The embodiment provides a rotary liquid-cooling X-ray transmission conversion target for a high-power electron accelerator, which rapidly disperses the power deposited by an electron beam to a larger area of a target surface in a high-speed rotation mode under the condition of not changing the bombardment position of the electron beam, and then reduces the temperature of the bombardment area of the electron beam and avoids the ablation damage of the conversion target through forced heat exchange between cooling liquid and the high-speed rotation target.
As shown in fig. 1, the rotary target of the present embodiment includes a vacuum chamber 1, a rotary target 2, and a bearing assembly 3; the rotating target 2 is arranged on the bearing assembly 3, and the bearing assembly 3 drives the rotating target 2 to do high-speed rotating motion in the vacuum cavity 1; an electron beam 3 output from an accelerator is injected along a beam pipeline 9, bombards the outer edge of the target surface of the rotating target 2 after passing through an electron transmission window 5, converts partial energy into an X ray 6, emits the X ray to a working area through an X ray output window 7, and enables the residual energy to be deposited to an annular area on the outer edge of the rotating target 2 in the form of heat through the high-speed rotation of the rotating target 2; the vacuum cavity 1 is provided with a cooling liquid inlet 1-1 and a cooling liquid outlet 1-2, and cooling liquid 10 flows into the vacuum cavity 1 through the cooling liquid inlet 1-1, exchanges heat with the rotating target 2 rotating at a high speed and then flows out from the cooling liquid outlet 1-2.
In the embodiment, the bearing assembly 3 includes a bearing rotor 3-1, a bearing driving sleeve 3-2 and a bearing stator 3-3; the rotating target 2 is arranged on a bearing rotor 3-1, a bearing stator 3-3 is fixed in a vacuum cavity 1, a bearing driving sleeve 3-2 is driven by a driving coil 8 outside the vacuum cavity to rotate at a high speed, so that the whole bearing rotor 3-1 and the rotating target 2 are driven to rotate at a high speed, and the electron beam power with a fixed position is deposited in an annular area through the high-speed rotation of the rotating target 2, so that the average power density and the target temperature are greatly reduced compared with a fixed target single-point deposition area; meanwhile, the high-temperature part of the rotating target 2 rotating at high speed is directly contacted with the cooling liquid 10, so that the heat dissipation efficiency is greatly increased.
In the present embodiment, diamond or beryllium vacuum sealed with metal is used as the X-ray output window 7 and the incident electron transmission window 5, and the thicknesses of the X-ray output window 7 and the electron transmission window 5 are preferably less than 1 mm.
In this embodiment, the bearing assembly 3 may be a ball bearing, and is driven by the external driving coil 8, so as to rotate the rotary target 2 at high speed. The drive coil 8 is cooled by, but not limited to, air cooling, water cooling, and oil cooling.
Example 2
This embodiment further optimizes the rotary target 2 in the above embodiment 1, and the surface of the rotary target 2 in this embodiment is processed into a plane (as shown in fig. 2), a curved surface (as shown in fig. 3) or a groove structure (as shown in fig. 4), so as to achieve high-efficiency convection with the cooling liquid and improve the cooling effect by the high-speed rotation of the rotary target 2.
Example 3
The embodiment further optimizes the rotating target 2 in the embodiment 1, and the total thickness of the target at the outer edge of the target surface of the rotating target 2, namely the electron beam bombardment area, is preferably 0.5-5 mm.
The whole target material of the rotating target 2 of the present embodiment is molybdenum, tungsten, rhenium, tantalum or rhenium-tungsten alloy, but is not limited thereto.
Example 4
This example further optimizes the rotary target 2 of example 1 above, which uses a combined welded structure, the outer edge of the target surface, i.e. the electron beam power deposition area, is made of but not limited to mo, w, re, ta or re-w alloy material, and the substrate of the target surface is made of but not limited to stainless steel, ni, cu or cu alloy material.
Example 5
In this embodiment, the positions of the cooling liquid inlet 1-1 and the cooling liquid outlet 1-2 in the above embodiments 1-4 are further optimally designed, the cooling liquid inlet 1-1 and the cooling liquid outlet 1-2 in this embodiment are opened along the tangential direction of the circular vacuum cavity, and the inlet and the outlet are distributed on the upper and lower sides of the vacuum cavity, so that the flowing direction and the rotating direction of the cooling liquid are consistent, and the cooling liquid is prevented from causing large impact on the rotating target rotating at high speed, as shown in fig. 5.
Example 6
In this embodiment, the positions of the cooling liquid inlet 1-1 and the cooling liquid outlet 1-2 in the above embodiments 1-4 are further optimally designed, and the cooling liquid inlet 1-1 and the cooling liquid outlet 1-2 in this embodiment form a small angle included angle along the tangential direction of the circular vacuum cavity, and the angle in this embodiment is preferably less than 30 degrees; the coolant directly cools the high-speed rotating target, and because the angle is small, the coolant does not cause large radial impact on the rotating target, as shown in fig. 6.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A rotary liquid-cooled X-ray transmission conversion target for a high-power electronic accelerator is characterized by comprising a vacuum cavity (1), a rotary target (2) and a bearing assembly (3); the rotary target (2) is arranged on the bearing assembly (3), and the bearing assembly (3) drives the rotary target (2) to do high-speed rotary motion in the vacuum cavity (1); an electron beam (4) output from an accelerator is injected along a beam pipeline (9), bombards the outer edge of the target surface of the rotating target (2) after passing through an electron transmission window (5), part of energy is converted into X rays (6) and is emitted to a working area through an X ray output window (7), and the residual energy is deposited to an annular area on the outer edge of the rotating target (2) in the form of heat through the high-speed rotation of the rotating target (2); the vacuum cavity (1) is provided with a cooling liquid inlet (1-1) and a cooling liquid outlet (1-2), and cooling liquid (10) flows into the vacuum cavity (1) through the cooling liquid inlet (1-1), exchanges heat with the rotating target (2) rotating at a high speed and then flows out from the cooling liquid outlet (1-2).
2. The rotary liquid-cooled X-ray transmission conversion target for the high-power electron accelerator as claimed in claim 1, wherein the thickness of the outer edge of the rotary target (2), i.e. the target thickness in the electron beam bombardment region, is 0.5-5 mm.
3. The rotary liquid-cooled X-ray transmission conversion target for the high-power electronic accelerator is characterized in that the target surface of the rotary target (2) is processed into a plane, a curved surface or a groove structure, and the high-efficiency convection with the cooling liquid is realized through the high-speed rotation of the rotary target (2).
4. A rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerators according to claim 3, characterized in that the whole target material of the rotary target (2) is made of molybdenum, tungsten, rhenium, tantalum or rhenium-tungsten alloy.
5. A rotary liquid-cooled X-ray transmission conversion target for high-power electron accelerators according to claim 1, characterized in that the rotary target (2) is of a combined welding type structure, the central base body of the rotary target (2) is made of stainless steel, nickel, copper or copper alloy material, and the outer edge of the rotary target (2), i.e. the electron beam bombardment area, is made of molybdenum, tungsten, rhenium, tantalum or rhenium-tungsten alloy material.
6. The rotary liquid-cooled X-ray transmission conversion target for the high-power electronic accelerator according to claim 1, wherein the cooling liquid inlet (1-1) and the cooling liquid outlet (1-2) are opened along the tangential direction of the circular vacuum chamber (1) and are respectively positioned at the upper side and the lower side of the vacuum chamber (1).
7. A rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerators, according to claim 1, characterized in that the cooling liquid inlet (1-1) and the cooling liquid outlet (1-2) open at an angle to the tangential direction of the circular vacuum chamber (1).
8. A rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerators according to any one of claims 1 to 7, characterized in that diamond or beryllium vacuum sealed with metal is used as the X-ray output window (7) and the electron transmission window (5).
9. A rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerators according to any one of claims 1 to 7, characterized in that the bearing assembly (3) is a ball bearing and is driven by a driving coil (8) outside the vacuum chamber, so that the rotary target (2) is driven to rotate at high speed.
10. A rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerators according to any one of claims 1 to 7, characterized in that the cooling liquid (10) is transformer oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922198032.8U CN211457490U (en) | 2019-12-10 | 2019-12-10 | Rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerator |
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| CN201922198032.8U CN211457490U (en) | 2019-12-10 | 2019-12-10 | Rotary liquid-cooled X-ray transmission conversion target for high-power electronic accelerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225886A (en) * | 2021-07-07 | 2021-08-06 | 中国工程物理研究院应用电子学研究所 | Water-cooling rotary radiation conversion target for high-energy microfocus X-ray |
| CN114166122A (en) * | 2021-12-02 | 2022-03-11 | 中国工程物理研究院流体物理研究所 | Automatic target adjusting device |
-
2019
- 2019-12-10 CN CN201922198032.8U patent/CN211457490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113225886A (en) * | 2021-07-07 | 2021-08-06 | 中国工程物理研究院应用电子学研究所 | Water-cooling rotary radiation conversion target for high-energy microfocus X-ray |
| CN114166122A (en) * | 2021-12-02 | 2022-03-11 | 中国工程物理研究院流体物理研究所 | Automatic target adjusting device |
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