Water gravity type internal target beam current measurement device

Abstract

The present application relates to the technical field of accelerator beam measurement, and particularly discloses a water gravity type inner target beam measurement device, which comprises a beam measurement assembly, a gravity adjustable cooling assembly, a lever balance assembly and a limiting piece, the beam measurement assembly is connected to one end of the lever balance assembly through the gravity adjustable cooling assembly, and the limiting piece is arranged on the side surface of the lever balance assembly. The device adopts a seesaw type structure, fully utilizes the installation space in the cyclotron shell, utilizes the gravity of the cooling liquid as the power of the seesaw type structure, can omit the arrangement of a complex power driving piece, is small in size, simple in structure, low in cost, good in cooling effect, and stable in the beam size of the inner target measurement piece during measurement.

Description

Technical Field

[0001] This invention relates to the field of beam measurement technology for small medical cyclotron accelerators, specifically a water gravity-type internal target beam measurement device. Background Technology

[0002] Small medical cyclotrons are used to produce radiopharmaceuticals. Charged particles in a cyclotron are continuously accelerated circumferentially within the cyclotron to maintain a high vacuum. The main function of the vacuum seal is to reduce the number of gas molecules inside the accelerator cavity, thereby reducing energy loss caused by collisions between accelerated particles and gas molecules, and also reducing the probability of accelerated particles deviating from their acceleration trajectory due to collisions with gas molecules. The "particles" in a particle accelerator actually refer to a stream of charged particles with relatively similar energy moving in a general direction (called longitudinal), often referred to as a particle beam or beam. The beam diagnostic system is an important component of the accelerator, often referred to as the "eyes" of the accelerator. It plays a crucial role in beam performance tuning, key parameter optimization, accelerator performance improvement, and operational status, and is used to measure beam intensity, position, cross-section, and emittance.

[0003] The internal target of a medical cyclotron accelerator is part of its beam diagnostic system, primarily used to measure the maximum beam intensity injected into the accelerator. It is an effective technique for observing the injected beam intensity during both the initial and later stages of beam commissioning. During accelerator commissioning, to improve beam injection efficiency, the mechanical and electromagnetic parameters of components such as the ion source, injection line, and injection deflector plate must be optimized. The internal target is placed near the 1 MeV energy level in the central region of the accelerator as a beam observation target. During commissioning, various parameters should be optimized to maximize the internal target beam current, i.e., to achieve the highest ion source injection efficiency, laying a foundation for adjusting and optimizing beam acceleration and extraction parameters.

[0004] Currently, most small medical cyclotron accelerator internal targets use cylinders as the power source. The drive unit is installed outside the accelerator, and the reciprocating motion of the cylinder drives the up-and-down movement of the internal target head, thereby achieving beam blocking and signal reception by the target head. For example, the design of a 10MeV medical cyclotron accelerator internal target published in the non-patent literature "Annual Report of China Institute of Atomic Energy" in 2012, Issue 1, mainly consists of a cylinder, a fixed flange, a cylinder flange, a guide flange, a sealed bellows assembly, an insulating flange, a magnetic cover sealing flange, water pipes, and a target head. The water pipe and target head are driven by a cylinder. The water pipe is generally made of copper and is a rigid pipe. In order to extend to the beam measurement position, the bottom of the water pipe is bent and is relatively long. Therefore, the angle is large, the space occupied is large, and the installation is restricted. The heat dissipation function of the target head is poor, and the stability of the inner target under long-term beam adjustment cannot be guaranteed. In addition, the vacuum sealing structure design of the target head and water pipe section is very complex and has weak pressure resistance. After long-term movement, the sealing bellows assembly will cause the seal to be damaged, and a vacuum seal cannot be formed, which will affect the beam measurement accuracy and disrupt the stable operation of the cyclotron.

[0005] For example, a high-precision linear transmission device for beam diagnostics disclosed in patent literature (Chinese Patent Publication No. CN107817511A) can also be used for beam measurement or diagnosis. However, its transmission device occupies a large space, which leads to space constraints during installation and increases the difficulty of installation and maintenance. In addition, insufficient cooling can easily cause the target head or probe to overheat, resulting in poor beam measurement accuracy. Summary of the Invention

[0006] The purpose of this invention is to provide a water gravity-type internal target beam measurement device, which adopts a seesaw structure, makes full use of the installation space inside the cyclotron housing, and uses the gravity of the coolant itself as the power for the seesaw structure. This eliminates the need for complex power drive components, resulting in a small size, simple structure, low cost, good cooling effect, and more stable beam size of the internal target measurement component during measurement.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A water gravity-based internal target beam measurement device includes a beam measurement component, a gravity-adjustable cooling component, a lever balance component, and a limiting component. The beam measurement component is connected to one end of the lever balance component via the gravity-adjustable cooling component, and the limiting component is disposed on the side of the lever balance component.

[0009] In a further embodiment, the gravity-adjustable cooling assembly includes a coolant storage chamber, a first input vacuum connector, a first output vacuum connector, a second input vacuum connector, a second output vacuum connector, and a vacuum connection flange. The first input vacuum connector and the first output vacuum connector are sequentially connected to the coolant storage chamber. The second input vacuum connector and the second output vacuum connector are sequentially and sealed to the vacuum connection flange. The second input vacuum connector and the second output vacuum connector are respectively connected to the first input vacuum connector and the first output vacuum connector through insulating elastic connecting pipes.

[0010] In a further embodiment, the coolant storage cavity is sealed to both the first input vacuum connector and the first output vacuum connector, and the pressure that the coolant storage cavity, the first input vacuum connector, and the first output vacuum connector can withstand after being connected is greater than or equal to 0.8 MPa.

[0011] In a further embodiment, both the second input vacuum connector and the second output vacuum connector include an adapter pipe, an adapter pipe locking element, an adapter pipe connecting flange, an adapter pipe sealing element, an adapter pipe input end connector, and an adapter pipe output end connector. One end of the adapter pipe passes sequentially through the adapter pipe locking element, the adapter pipe connecting flange, and the vacuum connection flange before being screwed to the adapter pipe output end connector, and the other end is screwed to the adapter pipe input end connector. The adapter pipe and the adapter pipe connecting flange are sealed to the vacuum connection flange through the adapter pipe sealing element, and the adapter pipe locking element locks the adapter pipe onto the adapter pipe connecting flange.

[0012] In a further embodiment, the gravity-adjustable cooling assembly also includes a flange seal, which is connected to a vacuum connection flange.

[0013] In a further embodiment, the beam measurement assembly includes a thin plate and an electrical signal connector. The thin plate is connected to the coolant storage cavity, and the electrical signal connector is electrically connected to the thin plate. One end of the electrical signal connector is connected to the inside of the vacuum connection flange, and the other end is connected to the outside of the vacuum connection flange.

[0014] In a further embodiment, the lever balancing assembly includes a support, a balance beam, and a counterweight. The middle part of the balance beam is rotatably connected to the support, the counterweight is disposed at one end of the balance beam, and the other end of the balance beam is connected to the coolant storage chamber.

[0015] In a further embodiment, the support member includes an insulating plate, a support connecting plate, a support shaft, an insulating bushing, an insulating pad, and a balance beam locking member. The insulating plate is connected to the support connecting plate, the insulating bushing passes through the middle of the balance beam, one end of the support shaft passes through the insulating pad and is connected to the balance beam locking member, and the other end passes through the insulating bushing and the insulating plate in sequence before being connected to the support connecting plate.

[0016] In a further embodiment, the limiting component includes two insulating rods, both of which are fixedly connected to the support connecting plate. One insulating rod is located above the balance beam, and the other insulating rod is located below the balance beam.

[0017] In a further embodiment, the coolant of the gravity-adjustable cooling assembly includes deionized water.

[0018] The beneficial effects of this invention are:

[0019] 1. In this invention, the beam measurement component can rotate around the lever balance component under the gravity adjustment of the coolant in the gravity-adjustable cooling component. This differs from existing methods that use a cylinder to drive a bent water pipe to move the target head. Because the water pipe has a large bending angle, it occupies a lot of space and is limited in installation. The beam measurement component requires relatively less space when rotating, and it eliminates the need for complex cylinder and other drive structures. The volume of the measuring end of the beam measurement component can be made relatively large, allowing it to receive more beam signals and more effectively receive the entire beam. The volume of the gravity-adjustable cooling component at this end can also be made relatively large, thus storing more cooling medium, improving the cooling effect on the beam measurement component during beam measurement, and enhancing the stability of the beam measurement component when receiving the beam.

[0020] 2. The beam measurement component in this invention includes a thin plate and an electrical signal connector. Compared with existing target heads, the receiving area on the beam acceleration cross section is larger, which can more effectively receive the entire beam and make the measurement results more accurate.

[0021] 3. In this invention, the coolant storage cavity, the first input vacuum pipe joint, the first output vacuum pipe joint, the second input vacuum pipe joint, the second output vacuum pipe joint, and the vacuum connection flange facilitate the filling and discharge of coolant, and facilitate the gravity adjustment of the gravity-adjustable cooling assembly.

[0022] 4. In this invention, the support, balance beam and counterweight facilitate the gravity adjustment of the rotating beam measurement component through the gravity-adjustable cooling component. The structure is simple and meets the rotation requirements of the beam measurement component. There is no need to equip the installation space with a rotation drive component to realize the adjustment of the measurement position of the beam measurement component. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1A connection diagram of the lever balance assembly according to an embodiment of the present invention is shown;

[0025] Figure 2 A connection diagram of the coolant storage chamber according to an embodiment of the present invention is shown;

[0026] Figure 3 A connection diagram of the support member according to an embodiment of the present invention is shown;

[0027] Figure 4 A connection diagram of a vacuum connection flange according to an embodiment of the present invention is shown;

[0028] Figure 5 A schematic diagram of the connection of the transfer pipe seal according to an embodiment of the present invention is shown;

[0029] Figure 6 A connection diagram of the adapter pipe locking member according to an embodiment of the present invention is shown;

[0030] Figure 7 A schematic diagram of the installation position of a water gravity-type internal target beam measurement device according to an embodiment of the present invention is shown. Figure 1 ;

[0031] Figure 8 This diagram illustrates the installation position of a water gravity-based internal target beam measurement device in the prior art. Figure 2 .

[0032] In the diagram: 01, Cyclotron housing; 011, Mounting port; 02, Cyclotron magnetic poles; 012, Mounting space; 03, Beam channel; 1, Beam measurement assembly; 11, Thin plate; 12, Electrical signal connector; 2, Gravity-adjustable cooling assembly; 21, Coolant storage chamber; 22, First input vacuum tube connector; 23, First output vacuum tube connector; 24, Second input vacuum tube connector; 241, Adapter pipe; 242, Adapter pipe locking element; 243, Adapter pipe connecting flange. 244. Transfer pipe seal; 245. Transfer pipe input connector; 246. Transfer pipe output connector; 25. Second output vacuum pipe connector; 26. Vacuum connection flange; 27. Flange seal; 3. Lever balance assembly; 31. Support component; 311. Insulating plate; 312. Support connecting plate; 313. Support shaft; 314. Insulating bushing; 315. Insulating pad; 316. Balance beam locking component; 32. Balance beam; 33. Counterweight; 4. Limiting component; 41. Insulating stop bar. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] See Figure 1 A water gravity-type internal target beam measurement device includes a beam measurement component 1, a gravity adjustable cooling component 2, a lever balance component 3, and a limiting component 4. The beam measurement component 1 is connected to one end of the lever balance component 3 through the gravity adjustable cooling component 2, and the limiting component 4 is disposed on the side of the lever balance component 3.

[0035] Its working principle: See Figure 1 , 7 As shown in Figure 8, one end of the lever balance component 3 is adjusted by the gravity value of the gravity-adjustable cooling component 2. For example, the gravity-adjustable cooling component 2 changes its own weight by filling or discharging coolant, which changes the rotation direction of the lever balance component 3 around the fulcrum of the lever balance component. The other end of the lever balance component 3 is raised or lowered. After rotating to the position of the limiting member 4, it is limited by the limiting member 4, so that the beam measurement component 1 reaches the beam measurement position, realizes beam blocking to receive beam signal for measuring beam signal, or leaves the beam measurement position, does not receive beam signal, and stops measuring beam signal.

[0036] Based on the above working principle, some preferred implementation structures are described in the following reference. Figure 1 , Figure 4 and Figure 7The gravity-adjustable cooling assembly 2 includes a coolant storage chamber 21, a first input vacuum connector 22, a first output vacuum connector 23, a second input vacuum connector 24, a second output vacuum connector 25, and a vacuum connection flange 26. The first input vacuum connector 22 and the first output vacuum connector 23 are connected in sequence to the coolant storage chamber 21. The second input vacuum connector 24 and the second output vacuum connector 25 are connected in sequence to the vacuum connection flange 26. The second input vacuum connector 24 and the second output vacuum connector 25 are respectively connected to the first input vacuum connector 22 and the first output vacuum connector 23 through insulating elastic connecting pipes. Here, the insulated flexible connecting tube can be a commonly used insulated hose or some insulated rubber tube in the field of cyclotron accelerators. It can bend flexibly. In use, the vacuum connecting flange 26 is connected to the outside of the accelerator housing. The second input vacuum tube connector 24 and the second output vacuum tube connector 25 are respectively connected to the external gas supply component. Coolant is injected into the coolant storage chamber 21 through the second input vacuum tube connector 24, the insulated flexible connecting tube, and the first input vacuum tube connector 22. After the coolant storage chamber 21 is filled with coolant, the gravity at the end of the coolant storage chamber 21 is increased. The external gas supply component supplies gas into the coolant storage chamber 21, and discharges the coolant to the outside of the coolant storage chamber 21 through the first output vacuum tube connector 23, the insulated flexible connecting tube, and the second output vacuum tube connector 25, thus realizing the gravity reduction at the end of the gravity-adjustable coolant storage chamber 21.

[0037] The shape and size of the first input vacuum tube connector 22 and the first output vacuum tube connector 23 can be reasonably selected according to the location of the gravity-adjustable cooling component 2 in the installation space. The second input vacuum tube connector 24 and the second output vacuum tube connector 25 can also be reasonably selected according to the pressure and installation space during installation.

[0038] See Figure 1 , 2 As shown in Figure 3, the coolant storage chamber 21 is sealed to both the first input vacuum connector 22 and the first output vacuum connector 23. After the coolant storage chamber 21, the first input vacuum connector 22, and the first output vacuum connector 23 are connected, the pressure they can withstand is greater than or equal to 0.8 MPa. This can meet the requirements of the accelerator vacuum.

[0039] To facilitate manufacturing, the coolant storage chamber 21 can be formed by welding a cover plate and a box body. Connection holes for the first input vacuum connector 22 and the first output vacuum connector 23 are pre-drilled in the box body. The first input vacuum connector 22 and the first output vacuum connector 23 are then inserted into these connection holes and welded. This allows for rapid manufacturing of the coolant storage chamber 21, the first input vacuum connector 22, and the first output vacuum connector 23, while maintaining low production costs and meeting pressure requirements.

[0040] See Figure 4 , Figure 5 and Figure 6 As shown, both the second input vacuum connector 24 and the second output vacuum connector 25 include an adapter pipe 241, an adapter pipe locking element 242, an adapter pipe connecting flange 243, an adapter pipe sealing element 244, an adapter pipe input end connector 245, and an adapter pipe output end connector 246. One end of the adapter pipe 241 passes through the adapter pipe locking element 242, the adapter pipe connecting flange 243, and the vacuum connecting flange 26 in sequence and is screwed to the adapter pipe output end connector 246. The other end is screwed to the adapter pipe input end connector 245. The adapter pipe 241 and the adapter pipe connecting flange 243 are sealed to the vacuum connecting flange 26 through the adapter pipe sealing element 244. The adapter pipe locking element 242 locks the adapter pipe onto the adapter pipe connecting flange 243. The adapter locking component 242 here includes two semi-circular locking rings and locking bolts. The two semi-circular locking rings are wrapped around the outer wall of the adapter 241 and locked by the locking bolts. Of course, the adapter locking component 242 can also be other types of locking structures, as long as they can be used for the installation of the adapter 241. The adapter input end connector 245 and the adapter output end connector 246 can be reasonably selected according to the installation space, the pressure of the gas and liquid entering and exiting, etc., and are all common technical means in this field, which will not be described in detail here. The adapter sealing component 244 includes a sealing ring, which is connected between the adapter 241, the adapter connecting flange 243 and the vacuum connecting flange 26, and is used to seal the three together to prevent gas leakage and damage to the high vacuum environment inside the cyclotron.

[0041] The gravity-adjustable cooling assembly 2 also includes a flange seal 27, which is connected to the vacuum connection flange 26. The flange seal 27 may include a locking bolt and a sealing ring. The sealing ring is used to seal the vacuum connection flange 26 to the cyclotron housing, and the locking bolt is used to lock the vacuum connection flange 26 and the sealing ring to the cyclotron housing 01 to prevent gas leakage and disruption of the high vacuum environment inside the cyclotron.

[0042] See Figure 1 , Figure 2 and Figure 4As shown, the beam measurement assembly 1 includes a thin plate 11 and an electrical signal connector 12. The thin plate 11 is connected to the coolant storage chamber 21, and the electrical signal connector 12 is electrically connected to the thin plate 11. One end of the electrical signal connector 12 is connected to the inside of the vacuum connection flange 26, and the other end is connected to the outside of the vacuum connection flange 26. The electrical signal connector can be a high-vacuum BNC connector, which is connected to the signal transmission line. The other end of the signal transmission line is fixed to the balance beam 32, which is electrically connected to the thin plate 11, by an M4x8 screw and an M4 nut. This is used to transmit the beam signal received by the coolant storage chamber 21. Of course, the other end of the signal transmission line can also be connected to other conductive parts connected to the thin plate 11, or directly connected to the thin plate 11.

[0043] An angle α exists between the coolant storage cavity 21 and the thin plate 11. After the coolant storage cavity 21 and the thin plate 11 are limited by the limiting member 4, this angle ensures that the maximum area of ​​the thin plate 11 is located within the beam channel 03 during beam blocking. When the coolant storage cavity 21 and the thin plate 11 are separated from the beam, the beam can continue to flow. For example, the shape of the coolant storage cavity 21 can be a square cavity, with the thin plate 11 connected to the square cavity, and the angle α between one side of the thin plate 11 and one side of the square cavity is 112.5°.

[0044] See Figure 1 and Figure 3 As shown, the lever balancing assembly 3 includes a support 31, a balance beam 32, and a counterweight 33. The middle part of the balance beam 32 is rotatably connected to the support 31, the counterweight 33 is located at one end of the balance beam 32, and the other end of the balance beam 32 is connected to the coolant storage chamber 21. This lever balancing assembly 3 has a simple structure, meets the rotation requirements of the beam measurement assembly 1, and eliminates the need for a rotation drive component in the installation space, thus enabling the adjustment of the measurement position of the beam measurement assembly 1.

[0045] See Figure 1 , Figure 3 and Figure 7As shown, the support member 31 includes an insulating plate 311, a support connecting plate 312, a support shaft 313, an insulating bushing 314, an insulating pad 315, and a balance beam locking member 316. The insulating plate 311 is connected to the support connecting plate 312. The insulating bushing 314 passes through the middle of the balance beam 32. One end of the support shaft 313 passes through the insulating pad 315 and is connected to the balance beam locking member 316. The other end passes through the insulating bushing 314 and the insulating plate 311 in sequence and is connected to the support connecting plate 312. The support connecting plate 312 is used to connect the support member 31 to the cyclotron magnetic pole 02. The insulating plate 311, insulating bushing 314, and insulating pad 315 are used to prevent the beam signal from being led out to the cyclotron magnetic pole 02 through the support shaft 313 and the support connecting plate 312, causing leakage. On the other hand, the insulating bushing 314 facilitates the rotation of the balance beam 32 around the axis of the support shaft 313, thus preventing beam signal leakage. The insulation structure and method of the support member 31 can be various and can be flexibly designed, which will not be described in detail here. The balance beam locking member 316 can be a structure including a flat washer and a locking nut. The flat washer and the locking nut are connected to the support shaft 313 in sequence to limit the longitudinal movement of the balance beam 32.

[0046] The limiting component 4 includes two insulating rods 41, both of which are fixedly connected to the support connecting plate 312. One insulating rod 41 is located above the balance beam 32, and the other insulating rod 41 is located below the balance beam 32. The insulating rods 41 prevent the beam signal from being transmitted to the cyclotron magnetic pole through the support connecting plate 312, thus preventing leakage.

[0047] The coolant in the gravity-adjustable cooling component 2 includes deionized water. Deionized water contains no ions and will not affect signal measurement. Of course, other cooling substances with the same function as deionized water can also be used, but these will not be elaborated upon here.

[0048] See Figure 7 and Figure 8 The vacuum connection flange 26 of the gravity-adjustable cooling assembly 2 is connected to the mounting port 011 of the cyclotron housing 01. The support 31 of the lever balance assembly 3 is connected to the magnetic pole 02 of the cyclotron. An insulated elastic connecting tube (not shown in the figure) passes through the mounting space 012 and connects the second input vacuum tube connector 24 and the second output vacuum tube connector 25 on the vacuum connection flange 26 to the first input vacuum tube connector 22 and the first output vacuum tube connector 23, respectively.

[0049] See Figure 1-8As shown, in practical use, the support connecting plate 312 is installed on the pre-drilled mounting hole on the magnetic pole 02 of the medical cyclotron accelerator. The input connector 245 of the adapter pipe is connected to the external air supply and coolant supply device. Coolant is injected into the coolant storage chamber 21 through the first input vacuum pipe connector 22. After the coolant storage chamber 21 is filled with coolant, the center of gravity of the lever balance assembly 3 is biased towards one end of the coolant storage chamber 21. As a result, the coolant storage chamber 21 automatically sinks under the action of gravity, and the end of the balance beam 32 impacts... After reaching the insulating stop bar 41 above the balance beam 32, the downward movement stops, and the thin plate 11 reaches the beam measurement position to receive the beam signal. The coolant storage chamber 21 transmits the beam signal to the balance beam 32. Screws and nuts are installed on the balance beam 32, and the signal transmission line fixed by the screws and nuts transmits the signal to the electrical signal connector 12. Thus, the signal received on the thin plate 11 is transmitted to the outside of the medical accelerator vacuum. The electrical signal connector 12 is connected to an external current meter, thereby realizing the measurement of the beam signal. Air is introduced into the coolant storage chamber 21 through the first input vacuum tube connector 22. Under the action of air pressure, the water inside the coolant storage chamber 21 is discharged through the first output vacuum tube connector 23, the insulated elastic connecting tube, and the second output vacuum tube connector 25. The overall center of gravity of the lever balance assembly 3 is biased towards the counterweight 33 end. The counterweight 33 end automatically descends and stops descending after hitting the insulated stop bar 41 below the balance beam 32. The thin plate 11 end naturally rises to avoid the beam channel 03 of the medical cyclotron accelerator and leaves the beam measurement position, thus no longer blocking and measuring the beam.

[0050] In summary, compared with the conventional cylinder-driven structure, the water gravity-type internal target beam measurement device in this application has a simpler structure, or seesaw-type structure. In the prior art, the cylinder-driven structure has a cylinder as its main body. If the cylinder-driven structure is selected, it must be equipped with a fixed flange, cylinder flange, guide flange, multiple guide rods, bellows sealing assembly. Just to drive the target head movement, there are these components. After these components are combined, the volume is more than three times that of the seesaw-type structure.

[0051] Although the overall structure of this application is simpler, the volume of the target cavity is increased, which is equivalent to increasing the water flow rate and enhancing the heat dissipation function of the beam receiving part, thus ensuring the stability of the beam receiving part during long-term beam adjustment. At the same time, the beam receiving part of this application uses a thin plate to receive the beam, which increases the receiving area on the beam acceleration cross section compared to existing targets, enabling more effective reception of the entire beam.

[0052] In addition, since the overall structure of this application is simpler and fewer components are needed for the beam receiving part, the standard parts such as cylinders that need to be purchased are basically non-existent. The cost of the existing technical solution is around tens of thousands, while the actual processing price of this application is around tens of thousands, which means that the manufacturing cost is significantly reduced.

[0053] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A water gravity-based internal target beam measurement device, characterized in that, It includes a beam measurement component (1), a gravity-adjustable cooling component (2), a lever balance component (3), and a limiting component (4). The beam measurement component (1) is connected to one end of the lever balance component (3) through the gravity-adjustable cooling component (2), and the limiting component (4) is disposed on the side of the lever balance component (3). The gravity-adjustable cooling assembly (2) includes a coolant storage chamber (21), a first input vacuum connector (22), a first output vacuum connector (23), a second input vacuum connector (24), a second output vacuum connector (25), and a vacuum connection flange (26). The first input vacuum connector (22) and the first output vacuum connector (23) are connected in sequence to the coolant storage chamber (21). The second input vacuum connector (24) and the second output vacuum connector (25) are sealed and connected in sequence to the vacuum connection flange (26). The second input vacuum connector (24) and the second output vacuum connector (25) are connected to the first input vacuum connector (22) and the first output vacuum connector (23) respectively through an insulating elastic connecting pipe.

2. A water gravity-type internal target beam current measurement device according to claim 1, wherein The coolant storage chamber (21) is sealed to the first input vacuum connector (22) and the first output vacuum connector (23). After the coolant storage chamber (21), the first input vacuum connector (22) and the first output vacuum connector (23) are connected, the pressure they can bear is greater than or equal to 0.8 MPa.

3. A water gravity type internal target beam current measurement device according to claim 1, wherein The second input vacuum connector (24) and the second output vacuum connector (25) both include an adapter pipe (241), an adapter pipe locking element (242), an adapter pipe connecting flange (243), an adapter pipe sealing element (244), an adapter pipe input end connector (245), and an adapter pipe output end connector (246). One end of the adapter pipe (241) passes through the adapter pipe locking element (242), the adapter pipe connecting flange (243), and the vacuum connecting flange (26) in sequence and is screwed to the adapter pipe output end connector (246). The other end is screwed to the adapter pipe input end connector (245). The adapter pipe (241) and the adapter pipe connecting flange (243) are sealed to the vacuum connecting flange (26) through the adapter pipe sealing element (244). The adapter pipe locking element (242) locks the adapter pipe onto the adapter pipe connecting flange (243).

4. A water gravity-based internal target beam measurement device according to any one of claims 1-3, characterized in that, The gravity-adjustable cooling assembly (2) also includes a flange seal (27) which is connected to a vacuum connection flange (26).

5. A water gravity type internal target beam current measurement device according to any one of claims 1 to 3, characterized in that, The beam measurement assembly (1) includes a thin plate (11) and an electrical signal connector (12). The thin plate (11) is connected to the coolant storage cavity (21). The electrical signal connector (12) is electrically connected to the thin plate (11). One end of the electrical signal connector (12) is connected to the inside of the vacuum connection flange (26), and the other end is connected to the outside of the vacuum connection flange (26).

6. A water gravity-type internal target beam current measurement device according to claim 5, wherein The lever balance assembly (3) includes a support (31), a balance beam (32) and a counterweight (33). The middle part of the balance beam (32) is rotatably connected to the support (31). The counterweight (33) is set at one end of the balance beam (32). The other end of the balance beam (32) is connected to the coolant storage chamber (21).

7. A water gravity-type internal target beam current measurement device according to claim 6, wherein The support member (31) includes an insulating plate (311), a support connecting plate (312), a support shaft (313), an insulating bushing (314), an insulating pad (315), and a balance beam locking member (316). The insulating plate (311) is connected to the support connecting plate (312). The insulating bushing (314) passes through the middle of the balance beam (32). One end of the support shaft (313) passes through the insulating pad (315) and is connected to the balance beam locking member (316). The other end passes through the insulating bushing (314) and the insulating plate (311) in sequence and is connected to the support connecting plate (312).

8. A water gravity-type internal target beam current measurement device according to claim 7, wherein The limiting member (4) includes two insulating rods (41), both of which are fixedly connected to the support connecting plate (312). One insulating rod (41) is located above the balance beam (32), and the other insulating rod (41) is located below the balance beam (32).

9. A water gravity type internal target beam current measurement device according to any one of claims 1 to 3, characterized in that, The coolant in the gravity-adjustable cooling assembly (2) includes deionized water.

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