Target disc rotation type BNCT neutron target system

Abstract

The invention provides a target disc rotation type BNCT neutron target system. The neutron target system comprises a plurality of target disc assemblies; the target disc rotating assembly comprises a target material mounting disc, a rotating sealing assembly and a target material rotating shaft with a hollow structure, the target material mounting disc is used for annularly and fixedly connecting the multiple target disc assemblies in the circumferential direction of the target material mounting disc, and the target material rotating shaft is fixedly connected with the middle of the target material mounting disc; the target box assembly comprises a box body, a box cover and a target material mounting disc, the target disc assembly is located in the box body, one part of the target material rotating shaft is located in the box body, the other part of the target material rotating shaft extends out of the box body, and the target material rotating shaft and the box body are sealed through a rotating sealing assembly; the power assembly is used for driving the target rotating shaft to drive the target disc assembly to rotate, one end of the flange assembly is fixedly connected with the box body, and the other end of the flange assembly is connected with the particle generating device. The invention solves the problem that the conventional BNCT neutron target is short in service life and the target material is scrapped due to the defects of bubbling and the like in the use process.

Description

Technical Field

[0001] The invention relates to the technical field of boron neutron capture therapy (Boron Neutron Capture Therapy, BNCT for short), and in particular to a target disk rotating BNCT neutron target system. Background Art

[0002] Boron Neutron Capture Therapy (BNCT) is a cutting-edge cancer treatment method that combines the principles of nuclear physics and biomedicine. The principle of this therapy is to accelerate protons to a certain energy through an accelerator and then bombard the target to form a neutron beam, which is then shaped and then used to combine neutrons with boron-10 ( 10 B) The property of producing nuclear reactions, by selectively delivering boron compounds to cancer cells and irradiating these cells with neutron beams, thus initiating nuclear reactions and releasing high-energy particles that are able to damage the DNA of cancer cells, leading to cancer cell death.

[0003] Neutron targets are key components of BNCT equipment, which are used to generate neutron beams for cancer treatment. The selection and design of neutron targets are crucial to the efficacy and safety of BNCT. Neutron targets are generally made of 9 Be(p,n) 9 B reaction, 7 Li(P,n) 7 Be reaction. However, when using this 9 Be(p,n) 9 In order to produce the amount of neutrons required for BNCT during the B reaction, the proton acceleration energy needs to be increased to 30MeV, and the energy of the neutrons produced will also increase accordingly. 7 Li(P,n) 7 In the Be reaction, the acceleration energy of protons is 9 Be(p,n) 9 B reaction, set lower at 2.5 MeV, 9 Be(p,n) 9 The acceleration energy of protons in the B reaction is one order of magnitude lower, the energy of the neutrons produced is significantly lower than that of the Be target, and the energy consumption for decelerating the neutrons is also low. Therefore, in BNCT, 7 Li(P,n) 7 The utilization of Be reaction has received widespread attention.

[0004] In accelerator boron neutron capture therapy, the proton beam is accelerated by an accelerator. The proton beam is accelerated to an energy sufficient to overcome the Coulomb repulsion of the target nucleus and undergoes a nuclear reaction with the target to produce neutrons. Therefore, in the process of producing neutrons, the target will be bombarded by an accelerated proton beam of very high energy level. A small number of protons undergo nuclear reactions with the neutron target to produce neutrons, and a large number of high-speed protons gradually slow down in the neutron target until their speed is zero and then deposit in the neutron target. The energy of the high-speed protons is absorbed by the neutron target, causing the temperature of the target to rise significantly. At the same time, the metal part of the target is prone to blistering, which affects the service life of the target.

[0005] The patent with application number 201911264901.0 discloses a target material for a neutron beam generator. The patent with application number 202210824444.1 discloses a target material for a particle beam generator. The above patents all adopt the conventional fixed target method, and the service life of the target material is extended to a certain extent by arranging different heat dissipation layers and anti-foaming layers. The patent with application number 202210788155.0 discloses a lithium target for BNCT, which attempts to solve the problem of heating and bubbling of neutron targets by setting an anisotropic carbon substrate, but its technical solution has certain problems: when no intermediate metal is set, the protons in the path cannot be captured; when the intermediate metal is set, the protons in the path are captured by the intermediate metal, which is equivalent to the heat of protons bombarding the lithium target and the intermediate metal layer being conducted through the anisotropic carbon substrate for heat dissipation; its heat dissipation has more conduction process of the anisotropic carbon substrate, but it is not as good as the heat conduction distance of the heat dissipation method without anisotropic carbon substrate and directly conducted by the intermediate metal layer after heat conduction, and the path is shorter.

[0006] Although the above technical solutions have solved the problems of heat dissipation and bubbling of neutron targets to a certain extent, the existing solutions all adopt a fixed target method, and the loading of the active layer material used for nuclear reaction with protons is small. When the reaction proceeds to a certain extent, the thickness of the active layer material is significantly reduced, resulting in extremely low neutron production. Therefore, this type of neutron target has a short service life due to the small loading of the active layer material. In addition, the neutron target is radioactive after neutron bombardment due to nuclear reaction or activation, which has certain pollution and is inconvenient to replace.

[0007] Therefore, it is necessary to propose a new technical solution to solve the above problems. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a BNCT neutron target system with a rotating target disk.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is as follows: (1) By splicing multiple target disk assemblies into a ring shape, the loading capacity of the active layer material is greatly increased, thereby greatly improving the service life of the neutron target. (2) By setting a cooling circuit in the target material back plate in the target disk assembly, the target material can be quickly cooled down during operation; the target disk assembly is spliced ​​into a ring shape, and the target disk assembly rotates during operation. The particle beam bombardment position remains unchanged, but the target disk assembly rotates, so that the bombarded part of the active layer on the target assembly changes all the time, greatly reducing the local heat generation. (3) Compared with the single heat dissipation method of conventional BNCT targets, the non-working area of ​​the target disk assembly that is not bombarded in the present invention also dissipates heat all the time, and the heat dissipation effect is greatly improved.

[0010] A key parameter of the BNCT neutron target is the neutron yield. When the active layer material of the neutron target is metallic lithium, the energy of the proton beam and the thickness of the active layer have a greater impact on the neutron yield. Through simulation calculations, it can be seen that when the proton beam energy is 2.2MeV, the neutron yield is maximum when the thickness of the metallic lithium layer is about 50μm; when the proton beam energy is 2.5MeV, the neutron yield is maximum when the thickness of the metallic lithium layer is about 98μm; when the proton beam energy is 3MeV, the neutron yield is maximum when the thickness of the metallic lithium layer is about 188μm. This also shows that the conventional BNCT neutron target will inevitably affect the neutron yield as the use time increases, thereby affecting the treatment effect. The active layer of the rotating target disk BNCT neutron target system of the present invention is a continuous ring after splicing, and the active layer load is several to dozens of times that of the conventional fixed BNCT target material, which can enable the neutron target to always maintain a relatively large neutron yield during a long period of use.

[0011] Specifically, the present invention provides a BNCT neutron target system with a rotating target disk, the BNCT neutron target system comprising: a plurality of target disk assemblies, each target disk assembly comprising a target material back plate and an active layer, the material of the active layer comprising at least any one of the following materials: metallic lithium, lithium alloy, beryllium, beryllium alloy; a target disk rotating assembly, the target disk rotating assembly comprising a target material mounting disk, a hollow target material rotating shaft and a rotating sealing assembly, the target material mounting disk being used to annularly fix the plurality of target disk assemblies in its circumferential direction, the target material rotating shaft being fixedly connected to the middle of the target material mounting disk; a target box assembly, the target box assembly comprising a box body and a box cover, the target material mounting disk and the target disk assembly being located inside the target box assembly, a portion of the target material rotating shaft being located inside the target box assembly, and a portion extending to the outside of the box body, the target material rotating shaft and the box body being sealed by a rotating sealing assembly; a power assembly and a flange assembly, the power assembly being used to drive the target material rotating shaft to drive the target disk assembly to realize rotational motion, one end of the flange assembly being fixedly connected to the box body , and the other end is connected to the particle generating device, wherein the multiple target disk assemblies are mounted on the target material mounting disk and spliced ​​into a continuous ring; a cooling circuit is arranged inside the target material back plate in the target disk assembly, and a plurality of groups of channels for cooling liquid circulation and correspondingly connected to the cooling circuit in each target disk assembly are arranged in the target material mounting disk, each group of channels comprises: a first channel having one end for connecting with one of the inlet end and the outlet end of the cooling circuit and the other end opening on the disk surface of the target material mounting disk and the target disk rotating shaft connecting one end, and a second channel having one end for connecting with the other of the inlet end and the outlet end of the cooling circuit and the other end opening located at the center of the target material mounting disk; a hollow coolant conduction pipe coaxial with the target material rotating shaft is arranged inside the target material rotating shaft; a channel between the inner wall of the target material rotating shaft and the outer wall of the coolant conduction pipe is fluidly connected to the first channel, and a channel inside the coolant conduction pipe is fluidly connected to the second channel, thereby forming a channel for coolant to enter and flow out of each target disk assembly.

[0012] Optionally, the thickness of the active layer in the target plate assembly is 20-300 μm.

[0013] Optionally, the target plate assembly is formed by splicing 2-20 pieces, and after splicing, the active layer material forms a complete ring; the target plate assembly is preferably spliced ​​by one of 4 pieces, 6 pieces, 8 pieces, 10 pieces, and 12 pieces.

[0014] Optionally, the target plate assembly also includes a hydrogen storage layer located between the target material backing plate and the active layer; the material of the hydrogen storage layer includes at least any one of the following materials: tantalum, palladium, tantalum alloy, palladium alloy, magnesium alloy, titanium alloy; the thickness of the hydrogen storage layer is 10-100μm.

[0015] Optionally, the material of the target backing plate in the target disk assembly includes at least any one of the following materials: copper, copper alloy, aluminum, aluminum alloy, and carbon-based material.

[0016] Optionally, a box cover in the target box assembly is provided with a target material mounting hole and a mounting cover for closing the target material mounting hole.

[0017] Optionally, the power assembly includes a power element, a power element mounting seat and a transmission element. Preferably, the power element is a motor.

[0018] Optionally, the flange assembly includes a particle beam bombardment channel and a particle beam monitoring channel.

[0019] In the present invention, a channel for cooling is provided inside the target back plate in the target disk assembly. After a plurality of target disk assemblies are installed on the target mounting disk, the target disk assemblies are spliced ​​into a continuous ring. A plurality of channels for cooling liquid circulation are also provided inside the target mounting disk, and the channels are correspondingly connected to the channels on the target disk assembly. All the coolant inlet channels in the plurality of target disk assemblies converge together on the target mounting disk, and all the coolant return channels converge together on the target mounting disk. After the coolant conduction pipe is connected to the target disk rotating shaft, it is fixedly connected to the target mounting disk, so that one of the channels of coolant entering or returning flows from the space formed by the inner wall of the target disk rotating shaft and the outer wall of the coolant conduction pipe, and the other channel of liquid flows from the inside of the coolant conduction pipe. Finally, the two liquid channels are respectively conducted through a rotary joint and connected to the coolant circulation device, so that full-time cooling of each target disk assembly is achieved.

[0020] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] 1. By splicing multiple target disc assemblies into a ring shape, the loading capacity of the active layer material is greatly increased, thereby greatly improving the service life of the neutron target.

[0022] 2. The target disk assembly is spliced ​​in a ring shape. When working, the target disk assembly rotates. The particle beam bombardment position remains unchanged, but the rotation of the target disk assembly causes the bombarded position of the active layer on the target material assembly to change all the time, which is equivalent to each target disk assembly working in an intermittent manner, greatly reducing the heat generation of a single target disk assembly.

[0023] 3. Compared with the single heat dissipation method of conventional BNCT targets, the non-working area of ​​the target disk assembly that is not bombarded in the present invention also dissipates heat all the time, and the heat dissipation effect is greatly improved.

[0024] 4. The cooling circuit provided in the back plate of the target assembly can cool each target assembly full time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a specific embodiment of the target plate rotating BNCT neutron target system of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of different viewing angles;

[0027] Figure 3 for Figure 1 A schematic diagram from another perspective;

[0028] Figure 4 for Figure 3 The middle view is a cross-sectional view along the depth direction;

[0029] Figure 5 for Figure 1 Schematic diagram after hiding some components;

[0030] Figure 6 for Figure 5 Schematic diagram of different viewing angles;

[0031] Figure 7 for Figure 5 Schematic diagram of another perspective;

[0032] Figure 8 It is a schematic diagram of a specific embodiment of the target material mounting plate of the present invention;

[0033] Fig. 9 for Figure 8 Schematic diagram of different viewing angles;

[0034] Fig.10 for Figure 8 A schematic diagram from another perspective;

[0035] Fig.11 It is a schematic diagram of a specific embodiment of the target assembly in the present invention;

[0036] Fig.12 for Fig.11 Schematic diagram of different viewing angles.

[0037] Description of the figure number:

[0038] 100 target plate assembly; 110 target back plate; 111 first cooling hole; 112 second cooling hole; 113 positioning hole; 114 fixing hole; 115 positioning part; 120 action layer; 200 target box assembly; 210 box body; 211 working hole; 220 box cover; 221 target mounting hole; 230 mounting cover; 300 target plate rotation assembly; 310 target mounting plate; 311 target mounting part; 312 rotating shaft mounting part; 313 first channel; 313a first channel target end; 313b first channel connecting end; 314 second channel; 314a second channel target end; 314b second channel channel connecting end; 315 target material positioning hole; 316 target material fixing hole; 320 target plate rotating shaft; 321 rotating shaft flange end; 322 power transmission part; 323 rotating shaft connecting end; 330 rotating sealing assembly; 340 cooling liquid transmission pipe; 341 transmission pipe flange end; 342 transmission pipe connecting end; 350 rotating joint; 351 first pipeline; 352 second pipeline; 360 first transmission element; 400 power assembly; 410 power element; 420 power element mounting seat; 430 second transmission element; 500 flange assembly; 510 particle beam bombardment channel; 520 particle beam monitoring channel. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] refer to Figures 1 to 4 , which is a schematic diagram of a specific embodiment of the present invention. The target disk rotating BNCT neutron target system of the present invention mainly includes a target disk assembly 100, a target box assembly 200, a target disk rotating assembly 300, a power assembly 400 and a flange assembly 500. The target box assembly 200 is composed of a box body 210, a box cover 220 and an installation cover 230; the box cover 220 is provided with a target material installation hole 221, and the installation cover 230 is used to close the target material installation hole 221. When the target material assembly 100 needs to be installed, the installation cover 230 is opened to put the target material assembly 100 into the box body 210 through the target material installation hole 221 and fix it to the target material installation disk 310. The box body 210 is provided with a working hole 211 connected to the flange assembly 500, and the projection of the working hole 211 on the target material assembly 100 is located on the action layer 120 of the target material assembly 100. The flange assembly 500 is connected to an upstream particle beam generator (not shown in the figure), and the particle beam bombards the active layer 120 on the target assembly 100 through the working hole 211 .

[0041] refer to Figures 4 to 7The target disk rotating assembly 300 is composed of a target material mounting plate 310, a target disk rotating shaft 320, a rotating seal assembly 330, a coolant conducting pipe 340, a rotating joint 350 and a first transmission element 360. The target disk rotating shaft 320 has a rotating shaft flange end 321 for being fixedly connected to the target material mounting plate 310, a power transmission part 322 for transmitting the rotating motion fixedly connected to the first transmission element 360 and a rotating shaft connecting end 323 for being connected to the rotating joint 350. The rotating shaft flange end 321 of the target disk rotating shaft 320 is fixedly connected to the target material mounting plate 310 and is located inside the target box assembly 200, and the power transmission part 322 is located outside the target box assembly 200. The rotating shaft flange end 321 and the power transmission part 322 are fixedly connected with the box body 210 in the target box assembly 200 through the rotating seal assembly 330, and after the connection, the target disk rotating shaft 320 can be rotated without damaging the seal.

[0042] refer to Figures 8 to 10 , is a specific embodiment of the target material mounting plate of the present invention. Fig. 9 It can be seen that in this embodiment, the target mounting plate 310 has six target mounting portions 311, that is, six target plate assemblies 100 can be installed. After the installation is completed, the effect is as follows: Figures 5 to 7As shown, after the six target disc assemblies 100 are installed, they form a continuous ring. In this embodiment, the target mounting disc 310 is disc-shaped, the target mounting parts 311 are evenly distributed on the edge of the disc, and the middle part of the target mounting disc 310 is a rotating shaft mounting part 312 for connecting with the target disc rotating shaft 320. A target positioning hole 315 and a target fixing hole 316 are provided at the target mounting part 311; a first channel 313 and a second channel 314 are also provided between the target mounting part 311 and the rotating shaft mounting part 312. The end of the first channel 313 located at the target mounting part 311 is the first channel target end 313a, and the end of the first channel 313 located at the rotating shaft mounting part 312 is the first channel connecting end 313b. The opening of the first channel connecting end 313b is located on the disk surface where the target mounting disk 310 is connected to the target disk rotating shaft 320; the opening of the first channel target end 313a is located on the plane where the target mounting part 311 contacts the target disk assembly 100. The end of the second channel 314 located at the target mounting part 311 is the second channel target end 314a, and the end of the second channel 314 located at the rotating shaft mounting part 312 is the second channel connecting end 314b. The opening of the second channel connecting end 314b is located at the center of the target mounting disk 310; the opening of the second channel target end 314a is located on the plane where the target mounting part 311 contacts the target disk assembly 100. Each target mounting portion 311 is provided with a first channel 313 and a second channel 314 connected to the rotating shaft mounting portion 312; the openings of the first channel connecting ends 313b of all the first channels 313 on the target mounting disk 310 are located on a plane, and the openings of the second channel connecting ends 314b of all the second channels 314 on the target mounting disk 310 converge at the center of the target mounting disk 310.

[0043] refer to Figure 11 to Figure 12 , which is a specific embodiment of the target disk assembly 100 of the present invention. The target disk assembly 100 is composed of a target backing plate 110 and an active layer 120. A cooling channel is arranged inside the target backing plate 110, and the entrance and exit of the cooling channel correspond to the first cooling hole 111 and the second cooling hole 112 on the target backing plate, that is, when the coolant is injected from the first cooling hole 111, it will flow out from the second cooling hole 112, or when the coolant is injected from the second cooling hole 112, it will flow out from the first cooling hole 111. The target backing plate is also provided with a positioning hole 113 for positioning during installation and a fixing hole 114 for fixing the target disk assembly 100. A positioning portion 115 is also provided on the target backing plate 100 for positioning when installing with an adjacent target backing plate 100.

[0044] refer to Figures 5 to 12When the target plate assembly 100 is mounted on the target material mounting plate 310, the positioning hole 113 on the target plate assembly 100 corresponds to the target material positioning hole 315 on the target material mounting plate 310; the first cooling hole 111 on the target plate assembly 100 corresponds to the first channel target material end 313a on the target material mounting plate 310; the second cooling hole 112 on the target plate assembly 100 corresponds to the second channel target material end 314a on the target material mounting plate 310; the fixing hole 114 on the target plate assembly 100 corresponds to the target material fixing hole 316 on the target material mounting plate 310. The target plate assembly 100 is fixedly connected to the target material fixing hole 316 by passing a screw (not shown in the figure) through the fixing hole 114. Optionally, there are one or two target material positioning holes 315; there are at least two target material fixing holes 316. There are at least one first cooling hole 111 and one second cooling hole 112 on the target plate assembly 100. The number of the first channels 313 and the second channels 314 on the target mounting plate 310 is consistent with the number of the first cooling holes 111 and the second cooling holes 112 .

[0045] refer to Figures 4 to 10, a coolant conduction pipe 340 is also provided inside the target disk rotating shaft 320. The coolant conduction pipe 340 is a hollow tube, and the outer diameter of the coolant conduction pipe 340 is smaller than the inner diameter of the target disk rotating shaft 320. The coolant conduction pipe 340 has a conduction pipe flange end 341 corresponding to the rotating shaft flange end 321 and a conduction pipe connection end 342 corresponding to the rotating shaft connection end 323; the coolant conduction pipe 340 divides the inside of the target disk rotating shaft 320 into two spaces, the first space is a space formed by the inner wall of the target disk rotating shaft 320 and the outer wall of the coolant conduction pipe 340, and the second space is the inner space of the coolant conduction pipe 340. All the first channel connection ends 313b on the target material mounting plate 310 converge and communicate with the first space formed by the inner wall of the target disk rotating shaft 320 and the outer wall of the coolant conduction pipe 340; all the second channel connection ends 314b on the target material mounting plate 310 converge and communicate with the second space formed by the inside of the coolant conduction pipe 340. The rotary joint 350 is connected to the rotary shaft connection end 323 of the target plate rotary shaft 320, and the first space formed by the inner wall of the target plate rotary shaft 320 and the outer wall of the coolant conduction pipe 340 is connected to the first pipe 351 fixedly connected to the rotary joint 350; the second space formed inside the coolant conduction pipe 340 is connected to the second pipe 352 fixedly connected to the rotary joint 350. Through the above-mentioned clever connection, the first pipe 351 is finally connected to the first cooling hole 111 on the target plate assembly, and the second pipe 352 is connected to the second cooling hole 112 on the target plate assembly. The function of cooling each target plate assembly 100 during the rotation of the target material mounting plate 310 and the target plate assembly 100 is realized. The cooling channels of multiple target plate assemblies 100 fixedly connected to the target material mounting plate 310 are connected in parallel. When the coolant is injected through the first pipe 351, the coolant passes through the first space formed by the inner wall of the target plate rotating shaft 320 and the outer wall of the coolant conduction pipe 340, the first channel connection end 313b, the first channel 313, the first channel target end 313a, the first cooling hole 111, the cooling channel inside the target back plate (not shown in the figure), the second cooling hole 112, the second channel target end 314a, the second channel 314, the second channel 314b, and the second space formed inside the coolant conduction pipe 340, and finally flows out through the second pipe 352. When the coolant is injected through the second pipe 352, the coolant circulation sequence is opposite to the above, and finally the target plate assembly 100 is cooled and then flows out from the first pipe 351. Any one of the first pipe 351 and the second pipe 352 can be connected to the coolant supply port of the cooling device, and the other is connected to the return port.

[0046] refer to Figures 1 to 4, a first transmission element 360 is fixedly connected to the power transmission part 322 of the target disk rotating shaft; a power assembly 400 is connected to the target box assembly 200, and a power element 410 of the power assembly 400 is fixedly connected to the box body 210 in the target box assembly 200 through a power element mounting seat 420. A second transmission element 430 is fixedly connected to the output end of the power element 410, and the second transmission element 430 cooperates with the first transmission element 360 to realize motion transmission. When the output end of the power element 410 outputs a rotational motion, the second power element 430 cooperates with the first transmission element 360 to drive the target disk rotating shaft 320 to drive the target mounting disk 310 and the target disk assembly 100 fixedly connected to the target mounting disk 310 in a ring shape to realize rotational motion.

[0047] In this embodiment, relevant sealing elements are provided between the box body 210 and the box cover 220 of the target box assembly 200, and between the box cover 220 and the mounting cover 230. Sealing elements are provided between the rotating seal assembly 330 and the flange assembly 500 and the box body 210. The flange assembly 500 also includes a particle beam bombardment channel 510 and a particle beam monitoring channel 520. The particle beam bombardment channel 510 is used to provide a movement channel for the upstream particle beam generating device to generate a particle beam. After passing through the particle beam bombardment channel 510, the particle beam directly bombards the active layer 120 on the target disk assembly 100. The particle beam monitoring channel 520 is used to monitor the state of the particle beam passing through the particle beam bombardment channel 510, so as to adjust the particle beam generating device to generate a more ideal particle beam.

[0048] In this embodiment, six target plate assemblies 100 are fixedly connected to the target material installation plate 310 to form a continuous annular neutron target. In other embodiments, the number may be any integer between 2 and 20. For example, eight target plate assemblies 100 may be fixed to form an annular neutron target, or twelve target plate assemblies 100 may be fixed to form an annular neutron target, etc. The relevant technicians only need to refer to the structure of the present invention to change the relevant structure of the target material installation plate 310 to easily achieve it.

[0049] It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A target disc rotating BNCT neutron target system, characterized in that The BNCT neutron target system includes: A plurality of target disk assemblies, each target disk assembly comprises a target material backing plate and an active layer, wherein the material of the active layer comprises at least any one of the following materials: metallic lithium, lithium alloy, beryllium, beryllium alloy; A target disk rotating assembly, the target disk rotating assembly comprising a target mounting disk, a hollow target rotating shaft and a rotating sealing assembly, wherein the target mounting disk is used to annularly connect the plurality of target disk assemblies in its circumferential direction, and the target rotating shaft is connected to the middle of the target mounting disk; A target box assembly, the target box assembly comprises a box body and a box cover, the target mounting plate and the target plate assembly are located inside the box body, a portion of the target rotating shaft is located inside the box body and a portion extends outside the box body, and the target rotating shaft and the box body are sealed by the rotating sealing assembly; A power assembly and a flange assembly, wherein the power assembly is used to drive the target material rotating shaft to drive the target plate assembly to realize rotational motion, one end of the flange assembly is fixedly connected to the box body, and the other end is connected to the particle generating device, wherein the plurality of target plate assemblies are mounted on the target material mounting plate and spliced ​​into a continuous ring; A cooling circuit is arranged inside the target back plate in the target disk assembly, and a plurality of groups of channels for cooling liquid circulation and correspondingly connected to the cooling circuits in each target disk assembly are arranged in the target mounting disk, each group of channels comprising: a first channel having one end connected to one of the inlet and outlet ends of the cooling circuit and the other end opened on the disk surface of the target mounting disk connected to the target disk rotating shaft, and a second channel having one end connected to the other of the inlet and outlet ends of the cooling circuit and the other end opened at the center of the target mounting disk; A hollow coolant conduction tube coaxial with the target material rotation shaft is arranged inside the target material rotation shaft; a channel between the inner wall of the target material rotation shaft and the outer wall of the coolant conduction tube is fluidly connected to the first channel, and a channel inside the coolant conduction tube is fluidly connected to the second channel, thereby forming a channel for coolant to enter and flow out of each target disk assembly.

2. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: The thickness of the active layer in the target disc assembly is 20-300 μm.

3. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: The number of the target disc components is 2-20, and after being spliced ​​together, the active layer material forms a complete ring.

4. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: The target plate assembly also includes a hydrogen storage layer located between the target material backing plate and the active layer; the material of the hydrogen storage layer includes at least any one of the following materials: tantalum, palladium, tantalum alloy, palladium alloy, magnesium alloy, titanium alloy; the thickness of the hydrogen storage layer is 10-100μm.

5. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: The material of the target back plate in the target disk assembly includes at least any one of the following materials: copper, copper alloy, aluminum, aluminum alloy, and carbon-based material.

6. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: A target material mounting hole and a mounting cover for closing the target material mounting hole are arranged on the box cover of the target box assembly.

7. The target disc rotating BNCT neutron target system according to claim 1, characterized in that: The power assembly comprises a power element, a power element mounting seat and a transmission element.

Images