Scanning box and water cooling system for linear accelerator

Abstract

The utility model discloses a scanning box and a water cooling system for a linear accelerator, the linear accelerator comprises a water cooling system, a waveguide device, an accelerating tube, an accelerating tube focusing coil and the scanning box, the water cooling system comprises a water pump and a plurality of water cooling pipelines, and the scanning box is arranged below the accelerating tube. The scanning box comprises a front panel and a back panel which are in an isosceles triangle shape, the two sides of the front panel and the two sides of the back panel are connected through side panels, water cooling boxes are correspondingly attached to the outer sides of the side panels, and the water cooling boxes are located between the scanning magnet bracket and the scanning box flange. One end of each water cooling box is provided with a water cooling box water inlet, the other end of each water cooling box is provided with a water cooling box water outlet, the two water cooling box water inlets are connected with a pipeline water outlet of a target water cooling pipeline, and the water cooling system comprises the target water cooling pipeline. The heat accumulation problem of the scanning box can be effectively solved, the stability of an accelerator vacuum system is ensured, and the safety of equipment is improved.

Description

Technical Field

[0001] The utility model relates to a scanning box and a water cooling system for 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 in which electrons operate must be a high vacuum environment (vacuum degree above 10-5Pa). If the vacuum seal is not good due to some reasons, such as high-voltage breakdown of the electron gun, leaks in the accelerator tube or the titanium pump itself, or electrons break through the five-way, scanning box, titanium membrane, etc., and if they are not discovered and handled 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] Technical problems existing in industrial linear accelerators in the prior art: the scanning box is generally a fan-shaped (or described as a cone-shaped) structure. Electrons with a certain energy are deflected under the action of the scanning magnet (Lorentz force). The greater the energy (i.e., speed), the smaller the deflection angle of the electron, and the smaller the energy, the larger the deflection angle of the electron. Among the emitted electrons, there is always a part of the electrons with lower energy that will hit the narrow side of the scanning box, causing the narrow side to heat up. As time accumulates, gas is generated in the heated part, causing a vacuum alarm, and even causing the weld to crack under the action of thermal stress, thereby affecting the leakage of the entire accelerator system (vacuum environment) or even causing serious consequences of collapse.

[0008] CN211831308U provides a scanning box wall cooling device. The technical solution of the utility model is to install a copper plate inside the lower narrow side of the scanning box to absorb electrons reaching the inner side (lower part) of the scanning box and conduct heat to another water-cooled copper plate.

[0009] In the above-mentioned prior art solutions, the area covered by the copper plate is very limited, and is only limited to the lower part of the scanning box (because the total height of the scanning box is generally more than 1 meter, and the solution with the copper plate inside is not convenient for installation in order to facilitate heat conduction, and the inner extension length of the copper plate is at most 10 to 20 centimeters), and there is still a large area where heat cannot be taken away.

[0010] Moreover, the presence of copper plates and water-cooled copper plates means that only when the copper plates and water-cooled copper plates are fitted together can they conduct heat well during installation. This poses many difficulties for processing, installation, and reinstalling and restoring the fitting of the upper and lower pressure plates of the scanning box after disassembly, and is not easy to achieve.

[0011] In addition, because a water-cooled copper plate needs to be embedded in the lower pressure plate, higher requirements are placed on the manufacturing process, which increases production costs. Utility Model Content

[0012] The technical problem to be solved by the utility model is to overcome the problem of heat accumulation of the scanning box in the prior art and the defects that the unstable vacuum system affects the safe operation of the equipment, and to provide a scanning box and water cooling system for a linear accelerator that can effectively solve the problem of heat accumulation of the scanning box, ensure the stability of the accelerator vacuum system, and improve the safety of the equipment.

[0013] The utility model solves the above technical problems through the following technical solutions:

[0014] A scanning box for a linear accelerator is characterized in that the linear accelerator comprises a water cooling system, a waveguide device, an accelerating tube, an accelerating tube focusing coil and the scanning box, and the water cooling system comprises a water pump and a plurality of water cooling pipelines.

[0015] The scanning box is arranged below the accelerating tube and comprises a front panel and a back panel of two isosceles triangles. Both sides of the front panel and the back panel are connected by side panels.

[0016] The top of the scanning box is provided with a scanning magnet bracket and the bottom is provided with a scanning box flange, and a water cooling box is correspondingly attached to the outer side of each side panel.

[0017] The water cooling box is located between the scanning magnet bracket and the scanning box flange, and one end of the water cooling box is provided with a water cooling box water inlet and the other end is provided with a water cooling box water outlet.

[0018] The water inlets of the two water cooling boxes are connected to a pipeline water outlet of a target water cooling pipeline through a first tee, and the water outlets of the two water cooling boxes are connected to a pipeline water return port of the target water cooling pipeline through a second tee.

[0019] The water cooling system includes the target water cooling pipeline.

[0020] Preferably, the several 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 the focusing coil, the water-cooling pipeline for the klystron, the water-cooling pipeline for the pulse transformer, and the target water-cooling pipeline are connected in parallel to the main water-cooling pipeline.

[0021] Preferably, the linear accelerator includes a processing terminal, a water pressure sensor is provided on the target water cooling pipeline, a water temperature sensor is provided at the water inlet of the water cooling box and the water inlet of the water cooling box, and both the water pressure sensor and the water temperature sensor are connected to the processing terminal.

[0022] Preferably, titanium pump docking flanges are respectively provided on the front panel and the back panel.

[0023] Preferably, the water cooling box is made of 304 austenitic stainless steel, and the thickness of the stainless steel plate of the water cooling box is greater than 2 mm.

[0024] Preferably, the scanning box flange includes an upper pressing plate and a lower pressing plate, the upper pressing plate is connected to the water cooling box, and a titanium metal film is clamped between the upper pressing plate and the lower pressing plate.

[0025] Preferably, the waveguide device includes a first section and a second section, the first section is connected to the waveguide port at the lower side of the accelerating tube, the five-way valve is also connected to the drift section titanium pump, and an accelerating tube focusing coil is provided on the outer side of the accelerating tube.

[0026] Preferably, one end of the second section is connected to the accelerating tube through a waveguide window, and the other end of the second section is connected to a klystron, and the klystron is connected to a pulse transformer.

[0027] Preferably, the water cooling system comprises a coolant tank, the coolant tank is connected to a water cooling pipeline and a temperature control pipeline, and an evaporator is arranged on the temperature control pipeline.

[0028] The present invention also provides a water cooling system for a linear accelerator, which is characterized in that a water cooling pipeline of the water cooling system is connected to the water cooling box of the scanning box for the linear accelerator as described above.

[0029] The present invention further provides a linear accelerator, which is characterized in that the linear accelerator comprises the scanning box as described above.

[0030] 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.

[0031] The positive and progressive effects of the utility model are:

[0032] The utility model can effectively solve the problem of heat accumulation of the scanning box, ensure the stability of the accelerator vacuum system, and improve the safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of the linear accelerator of Example 1 of the utility model.

[0034] Figure 2 This is a schematic diagram of the structure of the scanning box of Example 1 of the utility model.

[0035] Figure 3 This is another schematic diagram of the structure of the scanning box of Example 1 of the utility model.

[0036] Figure 4 This is a schematic diagram of the structure of the linear accelerator of Example 1 of the utility model.

[0037] Figure 5 This is a schematic diagram of the structure of the water cooling system of Example 1 of the utility model. DETAILED DESCRIPTION

[0038] 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

[0039] 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.

[0040] See also Figures 1 to 5 This embodiment provides an industrial linear accelerator, which includes a water cooling system 100, a waveguide device 101, an accelerating tube 108, an accelerating tube focusing coil 102 and a scanning box 103.

[0041] The water cooling system 100 includes a water pump 1001 and a plurality of water cooling pipelines 1002 .

[0042] The water cooling pipeline includes a water cooling pipeline for a focusing coil, a water cooling pipeline for a klystron, and a water cooling pipeline for a pulse transformer.

[0043] The waveguide device 101 includes a first section 1011 and a second section 1012 , wherein the first section is connected to the waveguide opening at the lower side of the accelerating tube.

[0044] The five-way pipe 107 is also connected to the drift section titanium pump 1014, and an accelerating tube focusing coil is arranged outside the accelerating tube.

[0045] One end of the second section 1012 is connected to the accelerating tube 108 through a waveguide window 1015 , and the other end of the second section is connected to the klystron 104 , and the klystron 104 is connected to the pulse transformer 105 .

[0046] The scanning box 103 is disposed below the accelerating tube 108 , specifically at the lower end of the five-way connection.

[0047] The scanning box 103 includes a front panel and a back panel in the shape of two isosceles triangles, and two sides of the front panel and the back panel are connected via side panels.

[0048] The scanning box 103 has a scanning magnet bracket 1031 on the top and a scanning box flange 1032 on the bottom.

[0049] A water cooling box 1033 is attached to the outer side of each side panel. The water cooling box is located between the scanning magnet bracket and the scanning box flange. A water cooling box water inlet 1034 is provided at one end of the water cooling box and a water cooling box water outlet 1035 is provided at the other end.

[0050] The water inlets of the two water cooling boxes are connected to the water outlet of a target water cooling pipeline 1003 through a first tee.

[0051] The water outlets of the two water cooling boxes are connected to the pipeline water return port of the target water cooling pipeline through a second three-way connection.

[0052] The water cooling system includes the target water cooling pipeline.

[0053] The water pump is arranged on the water cooling main pipe.

[0054] Water cooling boxes are installed on both sides of the narrow side of the scanning box. The length of the boxes almost covers the entire length of the narrow side, and the width is close to the width of the scanning box. By maximizing the fitting area, it is ensured that the heat generated when the electrons hit the narrow side is collected to the maximum extent.

[0055] The water-cooling box has continuously flowing cooling water, which can take away the heat in time, so that the temperature of the narrow side is always kept close to the water temperature, maintaining a good working condition, further reducing the possibility of vacuum alarm, and eliminating the possibility of major failure caused by this link.

[0056] The water cooling box is made of 304 austenitic stainless steel, which is non-magnetic and will not affect the trajectory of electronic operation. The thickness of the stainless steel plate is preferably 3mm, which is lightweight while being able to withstand a certain water pressure (the cooling water pressure is preset at 0.2MPa~0.4MPa, and the water flow can be monitored in combination with the size of the faucet).

[0057] The focusing coil water cooling pipeline, the klystron water cooling pipeline, the pulse transformer water cooling pipeline and the target water cooling pipeline are connected in parallel and then connected to the main water cooling pipeline.

[0058] The linear accelerator also includes a processing terminal 106. The target water cooling pipeline is provided with a water pressure sensor. The water inlet of the water cooling box and the water inlet of the water cooling box are each provided with a water temperature sensor. The water pressure sensor and the water temperature sensor are both connected to the processing terminal.

[0059] The water cooling box is made of 304 austenitic stainless steel, and the thickness of the stainless steel plate of the water cooling box is greater than 2 mm.

[0060] The front panel and the back panel are respectively provided with titanium pump docking flanges, and the scanning box flange includes an upper pressing plate and a lower pressing plate.

[0061] The upper pressing plate is connected to the water cooling box 103, and a titanium metal film is clamped between the upper pressing plate and the lower pressing plate.

[0062] The water cooling system includes a coolant tank 1004 , which is connected to a water cooling pipeline and a temperature control pipeline 1005 , and an evaporator 1006 is disposed on the temperature control pipeline.

[0063] The scanning box and water cooling system for the linear accelerator of this embodiment can effectively solve the problem of heat accumulation of the scanning box, ensure the stability of the accelerator vacuum system, and improve the safety of the equipment.

[0064] 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 scanning box for a linear accelerator, characterized in that: The linear accelerator includes a water cooling system, a waveguide device, an accelerating tube, an accelerating tube focusing coil and the scanning box. The water cooling system includes a water pump and a plurality of water cooling pipelines. The scanning box is arranged below the accelerating tube. The scanning box includes a front panel and a back panel in the shape of two isosceles triangles. The front panel and the back panel are connected on both sides by side panels. A scanning magnet bracket is arranged on the top of the scanning box and a scanning box flange is arranged on the bottom. A water cooling box is correspondingly attached to the outer side of each side panel. The water cooling box is located between the scanning magnet bracket and the scanning box flange. A water cooling box water inlet is arranged at one end of the water cooling box and a water cooling box water outlet is arranged at the other end. The two water cooling box water inlets are connected to a pipeline water outlet of a target water cooling pipeline through a first tee. The two water cooling box water outlets are connected to the pipeline water return port of the target water cooling pipeline through a second tee. The water cooling system includes the target water cooling pipeline.

2. The scanning box for a linear accelerator according to claim 1, characterized in that: The several 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.

3. The scanning box for a linear accelerator according to claim 2, characterized in that: The linear accelerator includes a processing terminal, a water pressure sensor is provided on the target water cooling pipeline, a water temperature sensor is provided on the water inlet of the water cooling box and the water inlet of the water cooling box, and the water pressure sensor and the water temperature sensor are both connected to the processing terminal.

4. The scanning box for a linear accelerator according to claim 1, characterized in that: The water cooling box is made of 304 austenitic stainless steel, and the thickness of the stainless steel plate of the water cooling box is greater than 2 mm.

5. The scanning box for a linear accelerator according to claim 1, characterized in that: The front panel and the back panel are respectively provided with titanium pump docking flanges, and the scanning box flange includes an upper pressure plate and a lower pressure plate. The upper pressure plate is connected to the water cooling box, and a titanium metal film is clamped between the upper pressure plate and the lower pressure plate.

6. The scanning box for a linear accelerator according to claim 1, characterized in that: The waveguide device comprises a first section and a second section, wherein the first section is connected to the waveguide port at the lower side of the accelerating tube, and the five-way is connected to the drift section titanium pump. An accelerating tube focusing coil is arranged outside the accelerating tube.

7. The scanning box for a linear accelerator according to claim 6, characterized in that: One end of the second section is connected to the accelerating tube through a waveguide window, and the other end of the second section is connected to a klystron tube, and the klystron tube is connected to a pulse transformer.

8. The scanning box for a linear accelerator according to claim 1, characterized in that: The water cooling system comprises a coolant tank, the coolant tank is connected to a water cooling pipeline and a temperature control pipeline, and an evaporator is arranged on the temperature control pipeline.

9. A water cooling system for a linear accelerator, characterized in that: The water cooling pipeline of the water cooling system is connected to the water cooling box of the scanning box for a linear accelerator according to any one of claims 1 to 8.

10. A linear accelerator, characterized in that: The linear accelerator comprises a scanning box as claimed in any one of claims 1 to 8.

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