A fluidic bump target structure

Abstract

The present application relates to a kind of jet bump target structures, and its base is internally provided with target installation groove, sealing groove and cooling liquid passage.Target is placed in base by target installation groove, and its lower surface is closely combined with sealing ring placed in sealing groove.Threaded hole is opened in the body of target, and itself is fixed on base by fastening screw, and sealing ring is extruded, and vacuum seal is formed with base cooling liquid passage.At the same time, target core has a protrusion, which is located directly above the cooling liquid passage, and the cross-sectional shape is a Gaussian curve.The structure described in the present application can ensure that the thickness of the target body is thin, while effectively reducing the stress generated by the cooling liquid jet and increasing the heat exchange area.The structure is convenient to process and install, and the target body is an independent structure, which is convenient to replace and maintain in later period, and has high economy.

Description

Technical Field

[0001] This invention belongs to the field of compact accelerator neutron sources, and particularly relates to a jet convex target structure. Background Technology

[0002] Compact accelerator neutron sources are widely used in medical, military, and other fields. Their principle involves using an ion beam generated by the accelerator to bombard a target material, thereby producing neutrons. After being bombarded by a high-energy proton beam, the target material experiences significant heat deposition. Heat removal typically involves using a material with high thermal conductivity as the target substrate, along with a coolant for heat exchange. Currently, common target structures have coolant channels inside or on the side of the target body, and the target body is relatively thick to facilitate welding and prevent deformation caused by coolant impact on the core. This type of target structure is time-consuming and difficult to manufacture, and its thickness hinders heat removal. Summary of the Invention

[0003] To address the issues of complex manufacturing processes and poor heat removal performance in the aforementioned target structures, this invention provides a jet-protruding target structure. This structure is thin and easy to process; the protruding cross-section exhibits a Gaussian curve distribution, which greatly improves the heat removal effect while preventing its own deformation.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A jet protrusion target structure, the jet protrusion target structure comprising: a base, a target, fastening screws, and a sealing ring;

[0006] The base is a target support base, which is provided with a coolant channel, a sealing groove and a target placement groove inside;

[0007] The target is placed in the target mounting groove, with its lower surface tightly attached to the sealing ring, and its core located directly above the coolant channel. The core has a protrusion facing the coolant channel, and the cross-sectional shape of the protrusion is a Gaussian curve. The target has threaded through holes around its perimeter, which are then fixed to the base by fastening screws, thereby evenly distributing the downward pressure generated by the threaded connection of the fastening screws to the sealing ring.

[0008] The sealing ring is placed in the sealing groove, with its upper and lower end faces contacting the target and the base respectively. After the target threads are tightened, the sealing ring is squeezed to deform it, thereby isolating the coolant inlet and outlet channels from the target upper surface, forming a coolant and vacuum seal.

[0009] Furthermore, the coolant channel includes a coolant inlet channel and a coolant outlet channel;

[0010] The target placement groove, sealing groove, and coolant inlet channel are concentrically distributed and their diameters gradually decrease. The coolant outlet channel is located radially between the coolant inlet channel and the sealing groove. The axial height of the coolant inlet channel is higher than that of the coolant outlet channel.

[0011] Furthermore, the target is made of oxygen-free copper, and its surface that is bombarded by the proton beam is coated with a titanium or lithium film. The area and thickness of the coating are set according to the proton beam and neutron parameters.

[0012] Furthermore, the protrusion of the target is located directly above the coolant outlet.

[0013] Furthermore, the sealing ring is made of fluororubber, and its cross-sectional shape and size are selected according to the sealing requirements and the size of the base.

[0014] In this invention, the base is a target support base, generally made of insulating material. To prevent coolant backflow, the axial height of the coolant inlet channel should be higher than that of the outlet channel. The target is made of a material with high thermal conductivity and good machinability, such as oxygen-free copper. The protruding cross-section of the target has a Gaussian curve shape, which facilitates fluid flow, effectively disperses the pressure of the coolant impact at the outlet, guides the coolant flow to the area around the target protrusion, and increases the heat exchange area.

[0015] In summary, the beneficial effects of this invention are:

[0016] 1. The protruding cross-section of the target core has a Gaussian curve shape, which can effectively reduce the stress generated by the coolant jet and help reduce the overall thickness of the target; at the same time, it increases the heat exchange area and can effectively remove the heat load of the target.

[0017] 2. The overall structure is simple, easy to process, and easy to install. The target is an independent structure, which facilitates later replacement and maintenance. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the cross-section of the structure of the present invention.

[0020] In the diagram: 1. Base; 2. Fastening screw; 3. Target; 4. Sealing ring; 5. Coolant outlet channel; 6. Coolant inlet channel; 101. Target mounting groove; 102. Sealing groove; 301. Target protrusion. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings:

[0022] like Figure 1As shown, the jet-protruding target structure of the present invention includes: a base 1, a fastening screw 2, a target 3, and a sealing ring 4. The base 1 supports the target 3 and has a target mounting groove 101, a sealing groove 102, and coolant channels (including a coolant outlet channel 5 and a coolant inlet channel 6) inside. The target 3 engages with the base 1 through the target mounting groove 101, and its lower surface is tightly abutted against the sealing ring 4 placed within the sealing groove 102. The core of the target 3 has a target protrusion 301 located directly above the coolant inlet channel 6, and the cross-sectional shape of the target protrusion 301 is a Gaussian curve. The target 3 has threaded through holes around its perimeter, through which the fastening screw 2 passes. The fastening screw 2 fixes the target 3 to the base and provides downward pressure to compress the sealing ring 4, forming a seal.

[0023] Preferably, the base 1 is made of polytetrafluoroethylene and is cylindrical with a diameter of 120-180 mm. The target mounting groove 101, sealing groove 102 and coolant channel inside are concentrically distributed and their diameters gradually decrease.

[0024] Preferably, the coolant outlet channel 5 is located between the coolant inlet channel 6 and the sealing groove 4, with a distance of 15-35 mm between them. At the same time, the coolant inlet channel 6 is 5-10 mm higher than the coolant outlet channel 5, and the two have a tapered transition.

[0025] Preferably, the target 3 is made of oxygen-free copper. The overall diameter is 60-100mm, the thickness of the central part that receives the proton beam bombardment is 1-3mm, and M4-M8 threaded through holes are drilled around the perimeter.

[0026] Preferably, the cross-sectional shape of the target protrusion 301 is a Gaussian curve with a standard deviation of 0.01 or 0.02, which is conducive to fluid flow, can guide the coolant to flow to the area around the target protrusion, effectively disperse the pressure of the coolant impact at the outlet, and increase the heat exchange area.

[0027] Preferably, the sealing ring 4 is made of fluororubber and has a rectangular cross-section. It is placed within the base sealing groove, with its upper end face contacting the target. The downward pressure from the target's threaded connection compresses the sealing ring, forming a coolant seal and a vacuum seal.

[0028] The fastening screw 2 is an M2 to M6 screw, preferably a countersunk Phillips head / hex socket head cap screw.

Claims

1. A jet-protrusion target structure, characterized in that, The jet protrusion target structure includes: a base, a target, fastening screws, and a sealing ring; The base is a target support base, which is provided with a coolant channel, a sealing groove and a target placement groove inside; The target is placed in the target mounting groove, with its lower surface tightly attached to the sealing ring, and its core located directly above the coolant channel. The core has a protrusion facing the coolant channel, and the cross-sectional shape of the protrusion is a Gaussian curve. The target has threaded through holes around its periphery, so that it can be fixed to the base by fastening screws, thereby evenly distributing the downward pressure generated by the threaded connection of the fastening screws to the sealing ring. The sealing ring is placed in the sealing groove, with its upper and lower end faces contacting the target and the base respectively. After the target threads are tightened, the sealing ring is squeezed to deform it, thereby isolating the coolant channel from the target's upper surface and forming a coolant and vacuum seal.

2. The jet protrusion target structure according to claim 1, characterized in that, The coolant passage includes a coolant inlet passage and a coolant outlet passage; The target placement groove, sealing groove, and coolant inlet channel are concentrically distributed and their diameters gradually decrease. The coolant outlet channel is located radially between the coolant inlet channel and the sealing groove. The axial height of the coolant inlet channel is higher than that of the coolant outlet channel.

3. The jet protrusion target structure according to claim 1, characterized in that, The target is made of oxygen-free copper, and its surface that is bombarded by the proton beam is coated with a titanium or lithium film. The area and thickness of the coating are set according to the proton beam and neutron parameters.

4. The jet protrusion target structure according to claim 2, characterized in that, The protrusion of the target is located directly above the coolant outlet.

5. The jet protrusion target structure according to claim 1, characterized in that, The sealing ring is made of fluororubber, and its cross-sectional shape and size are selected according to the sealing requirements and the size of the substrate.

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