Water cooling device for beam extraction system and linear accelerator

Abstract

The utility model discloses a water cooling device and a linear accelerator for a beam extraction system, wherein the beam extraction system comprises a scanning box and a scanning magnet, the water cooling device comprises a scanning box flange, a water cooling water inlet interface and a water cooling water outlet interface, the scanning box flange comprises an upper pressing plate and a lower pressing plate, a through hole docking with the scanning box outlet is provided in the middle of the upper pressing plate and the lower pressing plate, and a mounting hole is provided around the outer side of the through hole, the top of the upper pressing plate is connected to the scanning box, and the bottom end clamps a metal film with the lower pressing plate, the upper pressing plate comprises an upper pressing plate body and an upper pressing plate water box cover, a sinking platform is provided on the upper pressing plate body in an area between the mounting hole and the through hole, the upper pressing plate water box cover is installed above the sinking platform, the sinking platform and the upper pressing plate water box cover form a cooling water channel, and the water cooling water inlet interface and the water cooling water outlet interface are connected to both ends of the cooling water channel. The utility model can improve the working stability of the titanium metal film and improve the safety of the linear accelerator equipment.

Description

Technical Field

[0001] The utility model relates to a water cooling device for a beam extraction system and a linear accelerator. Background Art

[0002] A linear accelerator usually refers to an accelerator that uses a high-frequency electromagnetic field to accelerate particles, and the trajectory of the accelerated particles is a straight line. A high-frequency linear accelerator (HLA) is a device that accelerates charged particles using a high-frequency electric field distributed along a straight track.

[0003] The accelerating cavity in a high-frequency linear accelerator usually uses radio frequency acceleration technology, that is, using a high-frequency electric field to accelerate charged particles. By introducing a high-frequency electric field in the accelerating cavity, the particles can obtain higher energy and speed. High-frequency linear accelerators usually have higher acceleration capabilities and efficiency, so they have advantages in generating high-energy particle beams.

[0004] In the medical field, high-frequency linear accelerators are widely used in radiotherapy to treat cancer and tumors. By generating high-energy electron or photon beams, this accelerator can precisely target tumor cells and deliver high-energy particle beams into the patient's body to destroy malignant cells.

[0005] In the field of industrial production and processing, industrial linear accelerators can play a role in disinfecting and sterilizing products.

[0006] For a linear electron accelerator, the space where electrons operate must be a high vacuum environment (vacuum degree above 10-5Pa). If the vacuum seal is not good for some reason and it is not discovered and dealt with in time, the entire vacuum system will be contaminated by foreign gases, which may seriously damage the electron gun. It will take several days or even weeks for the entire accelerator system to return to normal working condition, which will cause great losses to production.

[0007] In the linear accelerator for irradiation, the beam extraction system consists of a scanning box and a scanning magnet. Electrons pass through the titanium film through the scanning box and enter the air. The electrons retain some energy (in the form of heat) at the edge of the titanium film and the titanium film flange (i.e., the pressure plate), so the above-mentioned parts need to be cooled.

[0008] In the past, most cooling methods used were air cooling, which had a poor effect and was greatly affected by the ambient temperature. When the heat dissipation effect decreased, it was easy to cause leakage of the entire vacuum system of the equipment. Utility Model Content

[0009] The technical problem to be solved by the utility model is to overcome the defects in the prior art that the beam extraction system of the linear accelerator adopts air cooling to dissipate heat, has poor heat dissipation effect and affects the operating stability of the equipment, and to provide a water cooling device for the beam extraction system and a linear accelerator that can improve the working stability of the titanium metal film and improve the safety of the linear accelerator equipment.

[0010] The utility model solves the above technical problems through the following technical solutions:

[0011] A water cooling device for a beam extraction system, the beam extraction system comprising a scanning box and a scanning magnet, wherein the water cooling device comprises a scanning box flange, a water cooling water inlet interface and a water cooling water outlet interface,

[0012] The scanning box flange includes an upper pressing plate and a lower pressing plate, wherein a through hole is provided in the middle of the upper pressing plate and the lower pressing plate to dock with the scanning box outlet, and a mounting hole is provided around the outer side of the through hole.

[0013] The top end of the upper pressure plate is connected to the scanning box and the bottom end is clamped with the lower pressure plate to clamp the metal film. The upper pressure plate includes an upper pressure plate body and an upper pressure plate water box cover. A sinking platform is provided on the area between the mounting hole and the through hole on the upper pressure plate body. The upper pressure plate water box cover is installed above the sinking platform. The sinking platform and the upper pressure plate water box cover form a cooling water channel. The water-cooled water inlet interface and the water-cooled water outlet interface are connected to both ends of the cooling water channel.

[0014] Preferably, the upper pressure plate water box cover comprises a box cover main board and a box cover protrusion, the box cover main board is annular, the box cover protrusion is connected to the inner edge of the annular shape, and the box cover main board and the box cover protrusion are integrally formed;

[0015] A water channel partition protrusion is provided on the upper pressure plate water box cover, the water cooling water inlet interface is arranged on one side of the water channel partition protrusion, and the water cooling water outlet interface is arranged on the other side of the water channel partition protrusion.

[0016] Preferably, a sinking groove is provided on the area between the mounting hole and the through hole on the upper pressure plate body, and the upper pressure plate water box cover is installed above the sinking groove, and the sinking groove and the upper pressure plate water box cover form a cooling water channel.

[0017] Preferably, the water-cooling water inlet interface and the water-cooling water outlet interface are arranged on the side of the upper pressure plate, and the water-cooling water inlet interface and the water-cooling water outlet interface are connected to the cooling water channel through a water inlet pipe and a water outlet pipe, respectively.

[0018] Preferably, the upper pressure plate water box cover is connected to the upper pressure plate body by welding, and the upper pressure plate is connected to the scanning box outlet by welding.

[0019] Preferably, the beam extraction system is used for a linear accelerator, and the linear accelerator includes a water cooling system, and the water cooling system includes a water pump, a coolant tank and a first water cooling pipeline. The water pump is arranged between the coolant tank and the first water cooling pipeline, and the water supply end of the first water cooling pipeline is connected to the water cooling water inlet interface, and the water cooling water outlet interface is connected to the water return end of the first water cooling pipeline.

[0020] Preferably, a scanning magnet bracket is provided on the top of the scanning box, and a water cooling box is provided on each of the two sides of the scanning box. The water cooling box is located between the scanning magnet bracket and the scanning box flange, and a water cooling box water inlet is provided at one end of the water cooling box and a water cooling box water outlet is provided at the other end.

[0021] Preferably, the water cooling system includes a plurality of water cooling pipelines, the water supply end of the target pipeline in the water cooling pipeline is divided into the first water cooling pipeline and the second water cooling pipeline through a first tee, the water supply end of the second water cooling pipeline is respectively connected to the water inlets of two water cooling boxes through a second tee, the water outlets of the two water cooling boxes are connected to the return water end of the second water cooling pipeline through a third tee, and the return water end of the second water cooling pipeline and the return water end of the first water cooling pipeline are connected to the return water end of the target pipeline through a fourth tee.

[0022] Preferably, the plurality of water cooling pipelines include a water cooling pipeline for a focusing coil, a water cooling pipeline for a klystron, and a water cooling pipeline for a pulse transformer, the water pump is arranged on the main water cooling pipeline, the water cooling pipeline for a focusing coil, the water cooling pipeline for a klystron, the water cooling pipeline for a pulse transformer, and the target water cooling pipeline are connected in parallel to the main water cooling pipeline;

[0023] Solenoid valves are provided on the first water-cooling pipeline and the second water-cooling pipeline.

[0024] The utility model also provides a linear accelerator, which is characterized in that the linear accelerator includes the water cooling device for the beam extraction system as described above.

[0025] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0026] The positive and progressive effects of the utility model are:

[0027] The utility model can improve the working stability of the titanium metal film and enhance the safety of the linear accelerator equipment.

[0028] The utility model solves the difficult problem of adding a water cooling pipeline to a narrow and complex flange part, thereby implementing a water cooling solution and improving the stability of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1This is a schematic structural diagram of the water cooling device of Example 1 of the utility model.

[0030] Figure 2 This is a schematic diagram of the structure of the beam extraction system of Example 1 of the utility model.

[0031] Figure 3 This is a schematic structural diagram of the water cooling device of Example 1 of the utility model.

[0032] Figure 4 This is another structural schematic diagram of the water cooling device of Example 1 of the utility model.

[0033] Figure 5 This is a schematic diagram of the structure of the beam extraction system of Example 1 of the utility model.

[0034] Figure 6 This is a schematic diagram of the structure of the water cooling system of Example 1 of the utility model. DETAILED DESCRIPTION

[0035] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments. Example

[0036] In this embodiment, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] See also Figures 1 to 6 This embodiment provides an industrial linear accelerator, which includes a water cooling system and a beam extraction system.

[0038] The beam extraction system includes a scanning box 100 and a scanning magnet. The scanning magnet is disposed on a scanning magnet bracket 101 on the scanning box.

[0039] The water cooling system includes a water cooling device.

[0040] The water cooling device includes a scanning box flange 102 , a water cooling water inlet interface 103 and a water cooling water outlet interface 104 .

[0041] The scanning box flange 102 includes an upper pressing plate 1021 and a lower pressing plate 1022 . A through hole 1023 that docks with the scanning box outlet is provided in the middle of the upper pressing plate 1021 and the lower pressing plate 1022 , and mounting holes 1024 are provided around the outer side of the through hole.

[0042] The top end of the upper pressing plate 1021 is connected to the scanning box 100 and the bottom end thereof clamps the titanium metal film 105 with the lower pressing plate 1022 .

[0043] The upper pressing plate includes an upper pressing plate body 1025 and an upper pressing plate water box cover 1026 .

[0044] A sinking platform 1027 is provided on the upper pressing plate body 1025 in an area between the mounting hole 1024 and the through hole 1023 .

[0045] The upper pressure plate water box cover 1026 is installed above the sinking platform 1027.

[0046] The sinking platform 1027 and the upper pressure plate water box cover 1026 form a cooling water channel 1028.

[0047] The water-cooling water inlet interface 103 and the water-cooling water outlet interface 104 are connected to two ends of the cooling water channel.

[0048] The upper pressure plate water box cover 1026 includes a box cover main board 10261 and a box cover protrusion 10262. The box cover main board is annular, and the box cover protrusion is connected to the inner edge of the ring. The box cover main board and the box cover protrusion are formed in one piece.

[0049] A water channel partition protrusion 10263 is provided on the upper pressure plate water box cover 1026.

[0050] The water-cooling water inlet interface is arranged on one side of the water channel partition protrusion.

[0051] The water cooling outlet interface is arranged on the other side of the water channel partition protrusion.

[0052] In the linear accelerator for irradiation, the beam extraction system consists of a scanning box and a scanning magnet. Electrons pass through the titanium film through the scanning box and enter the air. The electrons retain some energy (in the form of heat) at the edge of the titanium film and the titanium film flange (i.e., the pressure plate), so the above-mentioned parts need to be cooled.

[0053] The titanium film (titanium metal pressed) is tens of microns thick, and has a relatively high pass rate for medium and high energy electrons (more than 95%), but some electrons will still be consumed on the titanium film, forming a heat source.

[0054] In addition, some electrons fall on the inner sides of the two short sides of the pressure plate under the deflection of the scanning magnet. If heat accumulates here and the temperature exceeds 70°C, the thermal expansion and contraction will cause the aluminum wire used to seal the titanium film to open a tiny gap and cause vacuum leakage.

[0055] The beam outlet at the lower end of the scanning box includes an upper pressure plate, an aluminum wire (sealing function), a titanium film, and a lower pressure plate. The titanium film blocks the vacuum and the air, and the aluminum wire is pressed against the titanium film by the pressure plate to form a metal seal.

[0056] The upper pressing plate and the main shell of the scanning box are welded, and the heat of the narrow side of the scanning box will be transferred to the upper pressing plate.

[0057] The heat generated by electrons passing through the titanium film will also be transferred to the upper pressure plate.

[0058] In the past, most cooling methods used were air cooling. We plan to use water cooling because the specific heat capacity of water is much greater than that of air, and the cooling effect is better. The difficulty of the problem lies in that the titanium film pressure plate itself has multiple screw holes for pressing the titanium film to seal the vacuum, so if you want to arrange the water channel on the pressure plate at the same time, you need to design it carefully.

[0059] This embodiment has the following characteristics:

[0060] Design a water channel inside the upper pressure plate of the scanning box to avoid the screw holes;

[0061] The upper pressure plate can be split into upper and lower parts, which are welded and polished after being put together, so as to separate the vacuum from water and the vacuum from air;

[0062] After completing the water channel welding, the sealing surface of the pressure plate is finally subjected to surface treatment (finishing and polishing) to meet the vacuum sealing requirements.

[0063] Design partitions in the waterway so that water can only flow in one direction;

[0064] The water cooling water inlet port 103 and the water cooling water outlet port 104 are disposed on the side of the upper pressing plate 1021 .

[0065] The water-cooling water inlet interface 103 and the water-cooling water outlet interface 104 are connected to the cooling water channel 1028 through a water inlet pipe 1031 and a water outlet pipe 1041 respectively.

[0066] The upper pressing plate water box cover is connected to the upper pressing plate body by welding, and the upper pressing plate is connected to the scanning box outlet by welding.

[0067] The water cooling system further includes a water pump 200 , a coolant tank 201 and a first water cooling pipeline 202 .

[0068] The water pump is arranged between the coolant tank and the first water cooling pipeline 202 , the water supply end of the first water cooling pipeline 202 is connected to the water cooling water inlet interface 103 , and the water cooling water outlet interface 104 is connected to the water return end of the first water cooling pipeline 202 .

[0069] A scanning magnet bracket 101 is disposed on the top of the scanning box, and a water cooling box 203 is disposed on two sides of the scanning box.

[0070] The water cooling box 203 is located between the scanning magnet bracket 101 and the scanning box flange 102 .

[0071] One end of the water cooling box 203 is provided with a water cooling box water inlet 2031 and the other end is provided with a water cooling box water outlet 2032.

[0072] The water cooling system includes a plurality of water cooling pipelines, and a water supply end of a target pipeline 204 in the water cooling pipeline is divided into the first water cooling pipeline 202 and the second water cooling pipeline 205 through a first tee 206 .

[0073] The water supply end of the second water cooling pipeline 205 is connected to the water inlets of the two water cooling boxes through a second three-way connection 207 .

[0074] The water outlets of the two water cooling boxes are connected to the return water end of the second water cooling pipeline 205 through a third three-way connection 208 .

[0075] The return water end of the second water-cooling pipeline 205 and the return water end of the first water-cooling pipeline 202 are connected to the return water end of the target pipeline 204 through a fourth three-way connection 209 .

[0076] The plurality of water cooling pipelines include a water cooling pipeline for a focusing coil, a water cooling pipeline for a klystron, and a water cooling pipeline for a pulse transformer.

[0077] The water pump is arranged on the main water cooling line, and the focusing coil water cooling line, the klystron water cooling line, the pulse transformer water cooling line and the target water cooling line are connected in parallel to the main water cooling line;

[0078] Solenoid valves are provided on the first water-cooling pipeline and the second water-cooling pipeline.

[0079] This embodiment can improve the working stability of the titanium metal film and enhance the safety of the linear accelerator equipment.

[0080] This embodiment solves the problem of adding water cooling pipelines to narrow and complex flange parts, implements the water cooling solution, and improves the stability of equipment operation. Example

[0081] This embodiment is basically the same as Embodiment 1, except that:

[0082] A sinking groove is provided on the upper pressure plate body in an area between the mounting hole and the through hole, and the upper pressure plate water box cover is installed above the sinking groove, and the sinking groove and the upper pressure plate water box cover form a cooling water channel.

[0083] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A water cooling device for a beam extraction system, the beam extraction system comprising a scanning box and a scanning magnet, characterized in that: The water cooling device includes a scanning box flange, a water cooling water inlet interface and a water cooling water outlet interface. The scanning box flange includes an upper pressing plate and a lower pressing plate, wherein a through hole is provided in the middle of the upper pressing plate and the lower pressing plate to dock with the scanning box outlet, and a mounting hole is provided around the outer side of the through hole. The top end of the upper pressure plate is connected to the scanning box and the bottom end is clamped with the lower pressure plate to clamp the metal film. The upper pressure plate includes an upper pressure plate body and an upper pressure plate water box cover. A sinking platform is provided on the area between the mounting hole and the through hole on the upper pressure plate body. The upper pressure plate water box cover is installed above the sinking platform. The sinking platform and the upper pressure plate water box cover form a cooling water channel. The water-cooled water inlet interface and the water-cooled water outlet interface are connected to both ends of the cooling water channel.

2. The water cooling device for the beam extraction system according to claim 1, characterized in that: The upper pressure plate water box cover comprises a box cover main board and a box cover protrusion, wherein the box cover main board is annular, the box cover protrusion is connected to the inner edge of the annular shape, and the box cover main board and the box cover protrusion are integrally formed; A water channel partition protrusion is provided on the upper pressure plate water box cover, the water cooling water inlet interface is arranged on one side of the water channel partition protrusion, and the water cooling water outlet interface is arranged on the other side of the water channel partition protrusion.

3. The water cooling device for the beam extraction system according to claim 1, characterized in that: A sinking groove is provided on the upper pressure plate body in an area between the mounting hole and the through hole, and the upper pressure plate water box cover is installed above the sinking groove, and the sinking groove and the upper pressure plate water box cover form a cooling water channel.

4. The water cooling device for a beam extraction system according to claim 1, characterized in that: The water-cooling water inlet interface and the water-cooling water outlet interface are arranged on the side of the upper pressure plate, and the water-cooling water inlet interface and the water-cooling water outlet interface are connected to the cooling water channel through a water inlet pipe and a water outlet pipe respectively.

5. The water cooling device for beam extraction system according to claim 1, characterized in that: The upper pressing plate water box cover is connected to the upper pressing plate body by welding, and the upper pressing plate is connected to the scanning box outlet by welding.

6. The water cooling device for a beam extraction system according to claim 1, characterized in that: The beam extraction system is used for a linear accelerator, and the linear accelerator includes a water cooling system, and the water cooling system includes a water pump, a coolant tank and a first water cooling pipeline. The water pump is arranged between the coolant tank and the first water cooling pipeline, and the water supply end of the first water cooling pipeline is connected to the water cooling water inlet interface, and the water cooling water outlet interface is connected to the water return end of the first water cooling pipeline.

7. The water cooling device for the beam extraction system according to claim 6, characterized in that: A scanning magnet bracket is provided on the top of the scanning box, and a water cooling box is provided on each of the two sides of the scanning box. The water cooling box is located between the scanning magnet bracket and the scanning box flange, and a water cooling box water inlet is provided at one end of the water cooling box and a water cooling box water outlet is provided at the other end.

8. The water cooling device for the beam extraction system according to claim 7, characterized in that: The water cooling system includes a plurality of water cooling pipelines, wherein the water supply end of a target pipeline in the water cooling pipeline is divided into the first water cooling pipeline and the second water cooling pipeline through a first tee, the water supply end of the second water cooling pipeline is respectively connected to two water inlets of water cooling boxes through a second tee, the water outlets of the two water cooling boxes are connected to the return water end of the second water cooling pipeline through a third tee, and the return water end of the second water cooling pipeline and the return water end of the first water cooling pipeline are connected to the return water end of the target pipeline through a fourth tee.

9. The water cooling device for a beam extraction system according to claim 8, characterized in that: The plurality of water cooling pipelines include a water cooling pipeline for a focusing coil, a water cooling pipeline for a klystron, and a water cooling pipeline for a pulse transformer. The water pump is arranged on the main water cooling pipeline. The water cooling pipeline for a focusing coil, the water cooling pipeline for a klystron, the water cooling pipeline for a pulse transformer, and the target water cooling pipeline are connected in parallel to the main water cooling pipeline. Solenoid valves are provided on the first water-cooling pipeline and the second water-cooling pipeline.

10. A linear accelerator, characterized in that: The linear accelerator comprises a water cooling device for a beam extraction system according to any one of claims 1 to 9.

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