A dynamically switchable beamlet sorting device

Abstract

The application discloses a kind of dynamically switchable beam screening device, which is along the vertical direction of cyclotron from the accelerator cover plate outside to the accelerator cover plate inside, and cut off on the accelerator center plane, the beam screening device includes: top end is arranged in the accelerator cover plate outside one or more groups of driving devices, T-shaped aluminum profile frame is arranged in the lower end of the one or more groups of driving devices and is located inside the accelerator cover plate, one or more groups of slit clamp mechanisms are arranged on the horizontal aluminum profile of the T-shaped aluminum profile frame, one or more groups of push rod mechanisms are respectively pushed one or more groups of slit clamp mechanisms along the vertical direction and horizontal direction;The application indirectly adjusts the horizontal moving distance of slit clamp mechanism in guide groove plate by adjusting the distance of up and down push rod group moving up and down, so as to control the position of slit in the radial direction of beam path.This function is important for beam debugging and diagnosis and dynamic switching of different use conditions.

Description

Technical Field

[0001] This invention relates to a beam filtering device, and more specifically to a dynamically switchable beam filtering device. Background Technology

[0002] Inside a cyclotron, the beam cross-section is often a superposition of multiple beam loops. These multiple beam loops are the superposition of multiple energy beams, each energy level corresponding to a trajectory. The higher the energy of the beam, the larger its trajectory radius. However, the loops are not completely separated but rather overlapped in many places. Generally, the overlap between loops is more pronounced closer to the accelerator's center, and less so closer to the accelerator's larger radius, where the beam energy increases significantly.

[0003] When we only need to extract a beam of one type of energy, we need to block beams that do not belong to the current energy level. This is called beam blocking, and the purpose of beam blocking is to extract a beam of a single energy level per turn. However, single-turn single-energy extraction is only one requirement; multi-turn extraction is another. When multi-turn extraction is required instead of single-turn extraction, the beam blocking device must be removed.

[0004] One of the challenges in achieving beam selection is that the target rod can block the beam. For example... Figure 1a The method shown involves installing a beam clamping device at the head of the stripping target and moving it radially to clamp the beam at different radial positions. The advantage of this method is that when beam clamping is not needed, the target rod can be radially retracted to... Figure 1a As shown in the diagram, the beam clamping device and the target rod are positioned so as not to obstruct the beam. However, when beam clamping is required, the target rod extends in along with the clamping device. Since the horizontal position of the target rod is precisely where the beam passes, the target rod will block the beam, which is unacceptable.

[0005] The second difficulty in achieving beam selection lies in the inability to dynamically switch between single-turn and multi-turn beam extraction. For example... Figure 1b The method shown can be replaced by another method, which eliminates the target rod and directly places the beam clamping devices 2-1 and 2-2 at one or more predetermined positions along the radial direction of the accelerator's central plane. Although this solves the problem of the target rod blocking the beam, the demand changes frequently. When the demand changes and multiple turns of the beam are no longer required, the current beam clamping devices 2-1 and 2-2 must be removed. Removing the beam clamping devices 2-1 and 2-2 requires shutting down the accelerator for at least one day to allow the radiation to dissipate before disassembly and reassembly can be carried out. Otherwise, the extremely high radiation will harm the human body.

[0006] In summary, the difficulty of realizing beam selection inside the accelerator lies in that both the target rod cannot block the beam and the dynamic switching of single-turn extraction and multi-turn extraction under non-stop condition should be considered. SUMMARY

[0007] To solve the problems in the prior art, the present application provides a beam selection device capable of dynamic switching, which aims to solve the problem of considering both the target rod cannot block the beam and the dynamic switching of single-turn extraction and multi-turn extraction under non-stop condition.

[0008] To solve the technical problems, the present application adopts the following technical solutions:

[0009] The beam selection device capable of dynamic switching is penetrated from outside the accelerator cover plate to inside the accelerator cover plate along the vertical direction of the cyclotron and is stopped on the center plane of the accelerator, and the beam selection device comprises: one or more groups of driving devices 1 arranged at the top end outside the accelerator cover plate, a T-shaped aluminum profile frame 2 arranged at the lower end of the one or more groups of driving devices 1 and located inside the accelerator cover plate, one or more groups of slit clamping mechanisms 4 arranged on the horizontal aluminum profile 2-3 of the T-shaped aluminum profile frame 2, and one or more groups of push rod mechanisms 3 for pushing the one or more groups of slit clamping mechanisms 4 along the vertical direction and the horizontal direction, respectively.

[0010] When single-turn extraction of the beam is performed, the single-turn extraction of the beam corresponds to one group of driving devices 1, one group of slit clamping mechanisms 4 and one group of push rod mechanisms 3, or when single-turn extraction of the beam is performed, the single-turn extraction of the beam corresponds to multiple groups of slit clamping mechanisms 4, multiple groups of driving devices 1 and multiple groups of push rod mechanisms 3.

[0011] Each group of driving devices 1 is provided with a pair of motors 1-1, each group of slit clamping mechanisms 4 is provided with a pair of slit selection units, and each group of push rod mechanisms 3 is provided with a pair of upper and lower push rod groups and a pair of front and rear push rod groups.

[0012] Each pair of slit selection units is provided with a pair of guide groove plates 4-1, a pair of slit mounting plates 4-2 and a pair of slit plates 4-3, the pair of guide groove plates 4-1 are staggered along the radial direction of the accelerator, the pair of guide groove plates 4-1 are respectively provided with stepped guide grooves, the stepped guide grooves are used to simultaneously lift and retract the slits along the stepped guide grooves on the respective guide groove plates 4-1 when the slits are not needed to be clamped, so that the beam can pass through the lower end of the lifted and retracted slits without limitation, and the gap width of the pair of slit plates 4-3 is relatively narrow near the small radius of the accelerator and relatively wide near the large radius of the accelerator.

[0013] Further, the set of driving devices 1 is provided with a pair of driving motors 1-1, a pair of ball screws 1-1-1, a pair of sliding tables 1-2, a pair of sliding table fixing pieces 1-3, and a pair of sliding blocks 1-4 from top to bottom and from outside to inside. The pair of sliding blocks 1-4 are installed on the ball screws 1-1-1 of the respective sliding tables 1-2 and move up and down following the rotation of the motors. The pair of sliding tables 1-2 are used to support the respective ball screws 1-1-1 and are connected with the respective sliding table fixing pieces 1-3, which are then fixed to the upper surface of the upper sealing flange 1-5. The upper sealing flange 1-5 is fixed on the accelerator top end cover plate and is used to fix the driving device 1 and the T-shaped aluminum profile frame 2 on the accelerator cover plate. The pair of sliding blocks 1-4 are hinged to the top end of the respective upper and lower push rod upper parts 3-1, which drives the respective upper and lower push rod upper parts 3-1 and lower parts 3-2 to move back and forth in the vertical direction.

[0014] Further, the T-shaped aluminum profile frame 2 is composed of a vertical aluminum profile 2-1, a push rod fixing piece 2-2, a horizontal aluminum profile 2-3, and an angle aluminum 2-4. The vertical aluminum profile 2-1 is fixed on the upper sealing flange 1-5 through the angle aluminum 2-4. The push rod fixing piece 2-2 is fixed on the vertical aluminum profile 2-1, and the horizontal aluminum profile 2-3 is fixed on the vertical aluminum profile 2-1 through the angle aluminum 2-4.

[0015] Further, the length of the horizontal aluminum profile 2-3 does not exceed the length of the accelerator radius, and the distance from the two ends of the horizontal aluminum profile 2-3 to the vertical aluminum profile 2-1 can be statically adjusted according to the radial position of the slit plate 4-3.

[0016] Further, each set of push rod mechanism 3 is equipped with a pair of upper and lower push rod groups and a pair of v3-3. The pair of upper and lower push rod groups includes a pair of upper and lower push rod upper parts 3-1 and a pair of upper and lower push rod lower parts 3-2. By adjusting the distance of the pair of upper and lower push rod groups moving up and down, a pair of front and rear push rods 3-3 is driven, and then the horizontal moving distance of a pair of slit mounting plates 4-2 in the respective guide slot plates 4-1 is adjusted through the pair of front and rear push rods 3-3, thereby controlling the position of the slit in the radial direction of the beam path.

[0017] Further, the pair of upper and lower push rod lower parts 3-2 and the pair of upper and lower push rod upper parts 3-1 are fixedly connected by welding, and the pair of upper and lower push rod upper parts 3-1 is hinged to the top of the pair of sliding tables 1-2 of each set of driving device 1. The pair of front and rear push rods 3-3 is composed of two horizontal front and rear push rods 3-3 parallel to each other. The two ends of each front and rear push rod 3-3 are respectively hinged to the respective upper and lower push rod lower parts 3-2 and the slit mounting plate 4-2, thereby transmitting the driving force of the driving device 1.

[0018] Further, the pair of slit selection units of each slit clamping mechanism 4 are fixed on two adjacent slides of the plurality of slides arranged in front and back of the horizontal aluminum profile 2-3, and the radial position of each slide is adjustable.

[0019] Further, the top of the pair of slit mounting plates 4-2 of each slit clamping unit is slidingly fitted with the guide grooves of the pair of guide groove plates 4-1, and the bottom is fixedly fitted with the slit plate 4-3; the top of the pair of slit mounting plates 4-2 is hinged with the pair of front and rear push rods 3-3, and the driving force of the two motors of each set of driving device 1 is transmitted by the pair of front and rear push rods 3-3 and acts on the pair of slit mounting plates 4-2, thereby driving the pair of slit plates 4-3 to move back and forth along the respective slides of the pair of guide groove plates 4-1.

[0020] Further, the pair of slit selection units of each slit clamping mechanism 4 are in working state or non-working state at the same time, when they are in working state at the same time, the pair of slit mounting plates 4-2 are located above the steps of the stepped guide groove, when they are in non-working state at the same time, the pair of slit mounting plates 4-2 are located below the steps of the stepped guide groove.

[0021] Further, the height of the slit plate 4-3 is designed to be 2-3mm above the accelerator center plane.

[0022] Advantages and effects of the present application

[0023] 1. The present application indirectly adjusts the horizontal movement distance of the slit clamping mechanism in the guide groove plate by adjusting the up and down movement distance of the up and down push rod group, thereby controlling the position of the slit in the radial direction of the beam path. This function is of great significance for beam debugging and diagnosis and dynamic switching of different use conditions.

[0024] 2. The present application realizes the dynamic switching of single-turn extraction beam and multi-turn extraction beam by modifying the traditional phase selector, i.e. combining the traditional phase selector with stepped guide groove, movable position slit mounting plate, minimum width slit plate, driving device, push rod mechanism and T-shaped aluminum profile frame, thereby solving the problem of having to stop and disassemble the phase selector when switching from single-turn extraction to multi-turn extraction or from multi-turn extraction to single-turn extraction.

[0025] 3. The present application simplifies the structure, reduces the number of motors and saves materials by designing the stepped guide groove plate, so that the up and down movement of the motor drives the longitudinal and radial movement of the slit plate.

[0026] 4、The application adopts simple connecting rod structure to transmit driving force from outside vacuum to inside vacuum, avoiding using complex mechanism or expensive driving device. Movement transmission is all realized by connecting rod structure, so that position of movement component corresponds to position of driving component, and position of movement component can be determined by observing position of driving component. In strong magnetic and vacuum environment, aluminum profile, brass, red copper and non-magnetic stainless steel and other materials are used to meet the use requirements. The guide groove of guide groove plate is designed with height difference, which can make the position of idle state slit and the position of working state slit have continuity, and the overall structure can be folded without moving. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1a Radial movement profile of the prior art peeling target;

[0028] Figure 1b Top view of the prior art phase selector layout position;

[0029] Figure 2 Application effect profile of the beam screening device of the application which can be dynamically switched;

[0030] Figure 3a Schematic diagram of a single-turn extraction corresponding to a single set of driving devices of the application;

[0031] Figure 3b Schematic diagram of a single-turn extraction corresponding to a plurality of sets of driving devices of the application;

[0032] Figure 4 Perspective view of a set of driving devices of the application;

[0033] Figure 5 Perspective view of a T-shaped aluminum profile frame of the application;

[0034] Figure 6 Perspective view of a set of push rod mechanisms of the application;

[0035] Figure 7 Perspective view of a set of slit clamping units of the application;

[0036] Figure 8 Front view of a set of slit clamping units of the application;

[0037] 1: driving device; 1-1 driving motor; 1-2: sliding table; 1-3: sliding table fixing piece; 1-4: sliding block; 1-5: upper sealing flange; 2: T-shaped aluminum profile frame; 2-1: vertical aluminum profile; 2-2: push rod fixing piece; 2-3: horizontal aluminum profile; 2-4: corner aluminum; 3: push rod mechanism; 3-1: upper and lower push rod upper part; 3-2: upper and lower push rod lower part; 3-3: front and rear push rod; 4: slit clamping mechanism; 4-1: guide groove plate; 4-2: slit mounting plate; 4-3: slit plate; DETAILED DESCRIPTION

[0038] Design principle of the present application

[0039] 1、The design difficulty of the beam selection device: the difficulty lies in simplifying the structure and achieving the same function with the least number of motors. First, at least two beam slits are needed for single-turn beam extraction, one of which is used for correction of the other. The correction is because the same energy beam has a large degree of superposition between turns at a small radius due to low beam energy, and a small degree of superposition between turns at a large radius due to increased beam energy. Therefore, in order to avoid the beam slit passing through the non-effective beam containing the superposition part at a small radius, the width of the beam slit is relatively narrow, and in order to avoid the effective beam of the current energy being blocked at a large radius, the width of the beam slit is relatively wide. Second, each beam slit must have an independent slit plate, and two beams cannot be arranged on one slit plate. If two beams are arranged on one slit plate, the width of the slit plate will be greater than that of the plate with only one slit. The increase in the width of the slit plate will cause the next turn of the effective beam of the current energy to be blocked, so that the effective beam cannot pass through. Third, each beam slit has an active state and an inactive state. The active state is the single-turn extraction state, and the inactive state is the multi-turn extraction state. In the inactive state, the slit is lifted and the beam passes below the slit. Fourth, when the beam slit changes from one state to another, it needs to move in two directions, the horizontal direction and the vertical direction. The vertical direction ensures that the slit is lifted in the inactive state, and the horizontal direction changes the position of the beam clamp along the radial direction. Since the position of the motor is fixed, the beam clamp device needs to move in both the vertical and horizontal directions to change the position of the beam clamp along the radial direction. Fourth, summary: single-turn beam extraction requires at least two beam slits, and each beam slit must have two-directional movement. If the two-directional movement of each beam slit is realized by a motor, then two beam slits require four motors. Fifth, in order to reduce the number of motors for single-turn beam extraction, a motor is needed to realize the vertical and horizontal movements simultaneously. Thus, the four motors required for single-turn extraction are reduced to only two motors.

[0040] 2、The design difficulty of the stepped guide groove plate of the application. The method of realizing two-direction movement by one motor is to design a "stepped guide groove plate". When the motor moves in the vertical direction, the motor drives the push rod, the push rod drives the gap mounting plate to move along the guide groove from the highest point to the lowest point. Since the highest point and the lowest point of the guide groove have an inclined slope, the gap mounting plate also moves radially from the highest point to the lowest point.

[0041] The design difficulty of the stepped guide groove plate lies in the calculation of the height of the "step". If the height of the step is too high, the steepness of the step will be too large, causing the push rod mechanism 3 to be unable to push the gap mounting plate 4-2 and be stuck. If the height of the step is too low, although it is beneficial to the push rod mechanism 3 to push the gap mounting plate 4-2, the height of the gap mounting plate 4-2 driven by the gap mounting plate 4-3 is not high enough to lift off the accelerator center plane, and the gap mounting plate 4-2 cannot be completely in the non-working state. Therefore, the height of the step is designed to balance the beam unobstructed and the movement of the push rod mechanism, and the balance point is that the height of the gap mounting plate 4-3 is designed to be 2-3 mm above the accelerator center plane in the non-working state.

[0042] According to the above application principle, the application designs a beam screening device which can be dynamically switched.

[0043] A beam screening device which can be dynamically switched, as shown in Figure 2 、 Figure 3a 、 Figure 3b , the beam screening device penetrates from outside the accelerator cover plate to inside the accelerator cover plate along the vertical direction of the cyclotron and stops on the accelerator center plane. The beam screening device comprises: one or more groups of driving devices 1 arranged at the top end outside the accelerator cover plate, a T-shaped aluminum profile frame 2 arranged at the lower end of the one or more groups of driving devices 1 and located inside the accelerator cover plate, one or more groups of gap beam clamping mechanisms 4 arranged on the horizontal aluminum profile 2-3 of the T-shaped aluminum profile frame 2, and one or more groups of push rod mechanisms 3 for pushing the one or more groups of gap beam clamping mechanisms 4 along the vertical direction and the horizontal direction, respectively.

[0044] The beam screening device is characterized in that: when a single-turn extracted beam is extracted, the single-turn extracted beam corresponds to one group of driving devices 1, one group of gap beam clamping mechanisms 4 and one group of push rod mechanisms 3; or when a single-turn extracted beam is extracted, the single-turn extracted beam corresponds to multiple groups of gap beam clamping mechanisms 4, multiple groups of driving devices 1 and multiple groups of push rod mechanisms 3.

[0045] Supplementary note 1

[0046] 1) When a single-turn extracted beam corresponds to multiple groups of gap beam clamping mechanisms 4, multiple groups of driving devices 1 and multiple groups of push rod mechanisms 3, as shown in Figure 3bAs shown, at this time, the number of motors above the accelerator cover plate is four, four slit plates are arranged in the radial position of the accelerator, and two sets of push rod mechanisms are arranged. Each set of push rod mechanism corresponds to two upper and lower push rod upper parts, two upper and lower push rod lower parts, and two front and rear push rods. The slide of the horizontal aluminum profile 2-3 is usually two front and rear slides, and each slide is provided with a set of guide groove plate 4-1, slit mounting plate 4-2, and slit plate 4-3. When four slit plates are arranged, the horizontal aluminum profile (2-3) needs to have four front and rear slides, and each set of guide groove plate 4-1, slit mounting plate 4-2, and slit plate 4-3 occupies one slide.

[0047] 2) The significance of the four slit plates corresponding to the single-turn extracted beam is to refine the quality of the single-turn extracted beam. Generally, the most basic single-turn extraction needs two slits, and the use of four slits is to increase two in the radial position, for example, to arrange slit plates at radii of more than 100 mm, more than 200 mm, more than 500 mm, and more than 600 mm. The four slit plates correspond to beams of the same energy but different radial positions. Because the superposition of the beam group is less and less as it goes to the large radius, increasing two slit plates at the large radius is beneficial to the accuracy of the beam blocking.

[0048] As shown in Figure 4 Each set of driving devices 1 is provided with a pair of motors 1-1.

[0049] As shown in Figure 7 Each set of slit beam blocking mechanism 4 is provided with a pair of slit selection units.

[0050] As shown in Figure 6 Each set of push rod mechanism 3 is provided with a pair of upper and lower push rod groups and a pair of front and rear push rod groups.

[0051] As shown in Figure 7 , Figure 8 Each pair of slit selection units is provided with a pair of guide groove plates 4-1, a pair of slit mounting plates 4-2, and a pair of slit plates 4-3. The pair of guide groove plates 4-1 are staggered along the radial direction of the accelerator. The pair of guide groove plates 4-1 are respectively provided with stepped guide grooves, which are used to raise and retract the slits along the stepped guide grooves on the respective guide groove plates 4-1 when the beam is not blocked, so that the beam can pass through the retracted slits without limitation. The gap width of the pair of slit plates 4-3 is relatively narrow near the small radius of the accelerator and relatively wide near the large radius of the accelerator.

[0052] 3) The control source of all driving devices is a standard motor and a control board, which are mature products of existing technology, and will not be described here.

[0053] Further, the driving device 1 is provided with a pair of motors 1-1. Figure 3aAs shown, from top to bottom and from outside to inside, it is equipped with: a pair of drive motors 1-1, a pair of ball screws 1-1-1, a pair of slides 1-2, a pair of slide fixing parts 1-3, and a pair of sliders 1-4; the pair of sliders 1-4 are mounted on the ball screws 1-1-1 of their respective slides 1-2, and move up and down with the rotation of the motors; the pair of slides 1-2 are used to support their respective ball screws 1-1-1, and are connected to their respective slide fixing parts 1-3, and are then fixed to the upper surface of the upper sealing flange 1-5 through their respective slide fixing parts 1-3; the upper sealing flange 1-5 is fixed to the top cover plate of the accelerator, and is used to fix the drive device 1 and the T-shaped aluminum frame 2 to the accelerator cover plate; the pair of sliders 1-4 are hinged to the top of the upper part 3-1 of their respective upper and lower push rods, driving the upper part 3-1 and the lower part 3-2 of their respective upper and lower push rods to move back and forth in the vertical direction.

[0054] Furthermore, the T-shaped aluminum frame 2 as follows Figure 5 As shown, it consists of a vertical aluminum profile 2-1, a push rod fixing component 2-2, a horizontal aluminum profile 2-3, and an angle aluminum profile 2-4; wherein the vertical aluminum profile 2-1 is fixed to the upper sealing flange 1-5 through the angle aluminum profile 2-4; the push rod fixing component 2-2 is fixed to the vertical aluminum profile 2-1, and the horizontal aluminum profile 2-3 is fixed to the vertical aluminum profile 2-1 through the angle aluminum profile 2-4.

[0055] Furthermore, the horizontal aluminum profiles 2-3 as... Figure 5 As shown, its length does not exceed the radius of the accelerator, and the distance from both ends of the horizontal aluminum profile 2-3 to the vertical aluminum profile 2-1 can be statically adjusted according to the different radial positions of the slit plate 4-3.

[0056] Supplementary note 2

[0057] The radial position of the slit plate is adjusted constantly according to the energy of the extracted beam. This invention adjusts the radial position of the slit plate using two methods. The first is to adjust the radial length of the horizontal aluminum profile; increasing the length increases the radial displacement space of the slit mounting plate on the slide. The second is to adjust the relative position of the slit mounting plate and the horizontal aluminum profile, achieved by adjusting the position of the slit mounting plate screws.

[0058] Furthermore, each set of push rod mechanisms 3 as follows Figure 6 As shown, it is equipped with a pair of upper and lower push rod groups and a pair of front and rear push rod groups 3-3; the pair of upper and lower push rod groups includes a pair of upper push rods 3-1 and a pair of lower push rods 3-2. By adjusting the vertical movement distance of the pair of upper and lower push rod groups, the pair of front and rear push rods 3-3 are driven. Then, the pair of front and rear push rods 3-3 are used to adjust the horizontal movement distance of the pair of slit mounting plates 4-2 in their respective guide slot plates 4-1, thereby controlling the position of the slit in the radial direction of the beam path.

[0059] Further, the pair of upper and lower push rod lower parts 3-2 are fixedly connected to the pair of upper and lower push rod upper parts 3-1 by welding, and the pair of upper and lower push rod upper parts 3-1 are hingedly connected to the pair of slide table 1-2 top parts of each set of driving devices 1; the pair of front and rear push rods 3-3 are composed of two front and rear push rods 3-3 which are parallel to each other in the horizontal direction; the two ends of each front and rear push rod 3-3 are hingedly connected to the respective upper and lower push rod lower parts 3-2 and slit mounting plates 4-2, thereby transmitting the driving force of the driving devices 1.

[0060] Further, the pair of slit selection units of each set of slit clamping mechanism 4 are fixedly arranged on the adjacent two of the plurality of front and rear arranged slides of the horizontal aluminum profile 2-3, and the radial position of each slit selection unit on the respective slide is adjustable. Figure 8

[0061] Supplementary note 3 As shown in

[0062] , Figure 3a , 3b , the slit mounting plate is fixedly connected to the horizontal aluminum profile by screws, and the position of the screws can be moved. When the mounting hole position of the accelerator cover plate is unchanged and the width of the horizontal aluminum profile of the T-shaped aluminum profile frame is unchanged, if the radial position of the slit plate needs to be adjusted, the position of the slit mounting plate screw can be changed, so that the position of the slit of the slit plate meets the radial position requirement of the current beam to be extracted.

[0063] Further, the top part of the pair of slit mounting plates 4-2 of each set of slit clamping unit is slidingly matched with the guide groove of the pair of guide groove plates 4-1, and the bottom end is fixedly matched with the slit plate 4-3; the top part of the pair of slit mounting plates 4-2 is hingedly connected to the pair of front and rear push rods 3-3, and the driving force of the two motors of each set of driving devices 1 is transmitted by the pair of front and rear push rods 3-3 and acts on the pair of slit mounting plates 4-2, thereby driving the pair of slit plates 4-3 to move back and forth along the respective slides of the pair of guide groove plates 4-1.

[0064] Further, the pair of slit selection units of each set of slit clamping mechanism 4 are in working state or non-working state at the same time, when they are in working state at the same time, the pair of slit mounting plates 4-2 are located above the steps of the stepped guide groove, and when they are in non-working state at the same time, the pair of slit mounting plates 4-2 are located below the steps of the stepped guide groove.

[0065] Further, the height of the slit plate 4-3 is designed to be 2-3mm above the accelerator center plane.

[0066] Supplementary note 4:

[0067] The T-shaped aluminum frame 2 is a T-shaped fixed connecting rod composed of two aluminum profiles (vertical aluminum profile 2-1, horizontal aluminum profile 2-3), the aluminum profiles are connected by angle aluminum 2-4, the top end of the vertical aluminum profile is connected with the upper sealing flange 1-5 through angle aluminum, and the frame is fixed by connecting the upper sealing flange 1-5 to the top cover plate.

[0068] The driving device 1 is two straight line guides with a lead of 200 mm, which are vertically placed and fixed on the upper sealing flange 1-5 through screw holes at the tail, and the sliding table 1-2 is connected with the upper and lower push rod group to provide driving force for the whole system.

[0069] The upper and lower push rod group (upper and lower push rod upper part 3-1, upper and lower push rod lower part 3-2) is composed of two long rods with different radii, the two rods are fixed by inserting and welding, the upper part is a large radius rod, which cooperates with the star-shaped sealing ring to ensure the vacuum of the working space, and the lower end is connected with the front and rear push rod 3-3 to transmit driving force.

[0070] The guide groove plate 4-1 is a copper plate with a horizontal guide groove at the lower end, the guide groove enables the sliding bolt of the target group (slit mounting plate 4-2, slit plate 4-3) to move only in the groove, thereby limiting the movement track of the target group. The target group is the mounting part of the slit, the upper end of the target group is provided with a sliding bolt which cooperates with the guide groove plate, and the lower end is a slit target, the middle of the upper end of the target group is connected with the tail end of the front and rear push rod through a bolt and is limited on the guide groove plate.

[0071] Embodiment

[0072] The beam selector adopting the present application can continuously adjust the position of the slit within a certain range, and the slit can be retracted when not needed, and the main process of function implementation is as follows:

[0073] When not needed, the target group is located at the highest position of the guide groove plate, the bottom slit is separated from the plane where the beam is located, and the beam can pass through without limitation.

[0074] When the slit is needed, the driving device drives the upper and lower push rod group to move downward, thereby driving the front and rear push rod to move, at this time, the slit is located in the plane where the beam moves, and the beam needs to pass through the slit to continue to move.

[0075] When the beam condition changes, the position of the slit needs to be adjusted, at this time, the driving device is controlled to drive the upper and lower push rod group, so as to indirectly control the position of the target group in the sliding groove of the guide groove plate, to meet the experimental requirements.

[0076] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A dynamically switchable beamlet sorting device that extends along a vertical direction of a cyclotron from outside an accelerator cover plate to inside the accelerator cover plate and terminates at a center plane of the accelerator, the beamlet sorting device comprising: The top end of the accelerator cover plate is arranged with one or more sets of driving devices (1), a T-shaped aluminum profile frame (2) arranged at the lower end of the one or more sets of driving devices (1) and located inside the accelerator cover plate, one or more sets of slit clamping mechanisms (4) arranged on the horizontal aluminum profile (2-3) of the T-shaped aluminum profile frame (2), and one or more sets of push rod mechanisms (3) for pushing the one or more sets of slit clamping mechanisms (4) along the vertical and horizontal directions respectively. The single-turn extraction beam corresponds to a set of driving devices (1), a set of slit clamping mechanisms (4), and a set of push rod mechanisms (3) when the single-turn extraction beam is extracted; or the single-turn extraction beam corresponds to multiple sets of slit clamping mechanisms (4), multiple sets of driving devices (1), and multiple sets of push rod mechanisms (3) when the single-turn extraction beam is extracted. Each set of driving devices (1) is provided with a pair of motors; each set of slit clamping mechanisms (4) is provided with a pair of slit selection units; and each set of push rod mechanisms (3) is provided with a pair of upper and lower push rod groups and a pair of front and rear push rods (3-3). Each pair of slit selection units is provided with a pair of guide groove plates (4-1), a pair of slit mounting plates (4-2), and a pair of slit plates (4-3); the pair of guide groove plates (4-1) are staggered along the radial direction of the accelerator; each guide groove plate (4-1) is provided with a stepped guide groove, which is used to simultaneously lift and retract the pair of slit mounting plates (4-2) along the stepped guide groove on the respective guide groove plate (4-1) when the slit is not needed to be clamped, so that the beam can pass through the lifted and retracted slit at the lower end without limitation; the gap width of the pair of slit plates (4-3) is relatively narrow near the small radius of the accelerator and relatively wide near the large radius of the accelerator.

2. The dynamically switchable beamlet sorting device of claim 1, wherein: The one set of driving devices (1) is provided from top to bottom and from outside to inside with a pair of driving motors (1-1), a pair of ball screws (1-1-1), a pair of sliding tables (1-2), a pair of sliding table fixing members (1-3), and a pair of sliding blocks (1-4); the pair of sliding blocks (1-4) are installed on the ball screw (1-1-1) of the respective sliding table (1-2) and move up and down following the rotation of the motor; the pair of sliding tables (1-2) are used to support the respective ball screw (1-1-1) and are connected with the respective sliding table fixing member (1-3), which is then fixed to the upper surface of the upper sealing flange (1-5); the upper sealing flange (1-5) is fixed on the top end cover plate of the accelerator and is used to fix the driving device (1) and the T-shaped aluminum profile frame (2) on the accelerator cover plate; and the pair of sliding blocks (1-4) are hingedly connected with the top end of the respective upper and lower push rod upper part (3-1) to drive the respective upper and lower push rod upper part (3-1) and the upper and lower push rod lower part (3-2) to move back and forth along the vertical direction.

3. The dynamically switchable beamlet sorting device of claim 2, wherein: The T-shaped aluminum frame (2) is composed of vertical aluminum profiles (2-1), push rod fixing parts (2-2), horizontal aluminum profiles (2-3) and corner aluminum (2-4); wherein the vertical aluminum profiles (2-1) are fixed on the upper sealing flange (1-5) through the corner aluminum (2-4); the push rod fixing parts (2-2) are fixed on the vertical aluminum profiles (2-1), and the horizontal aluminum profiles (2-3) are fixed on the vertical aluminum profiles (2-1) through the corner aluminum (2-4).

4. The dynamically switchable beamlet sorting device of claim 3, wherein: The length of the horizontal aluminum profile (2-3) is not more than the length of the accelerator radius, and the distance from the two ends of the horizontal aluminum profile (2-3) to the vertical aluminum profile (2-1) can be statically adjusted according to the radial position of the slit plate (4-3).

5. The dynamically switchable beamlet sorting device of claim 1, wherein: The pair of upper and lower push rod groups include a pair of upper and lower push rod upper parts (3-1) and a pair of upper and lower push rod lower parts (3-2), the distance of the upper and lower movement of the pair of upper and lower push rod groups is adjusted to drive a pair of front and rear push rods (3-3), and then the horizontal movement distance of a pair of slit mounting plates (4-2) in the respective guide groove plates (4-1) is adjusted through the pair of front and rear push rods (3-3), so as to control the position of the slit in the radial direction of the beam path.

6. The dynamically switchable beamlet sorting device of claim 5, wherein: The pair of upper and lower push rod lower parts (3-2) and the pair of upper and lower push rod upper parts (3-1) are fixedly connected in a welding manner, the pair of upper and lower push rod upper parts (3-1) are hinged with a pair of sliders (1-4) of each group of driving devices (1); the pair of front and rear push rods (3-3) are composed of two horizontal front and rear push rods which are parallel to each other; the two ends of each front and rear push rod (3-3) are respectively hinged with the respective upper and lower push rod lower parts (3-2) and the slit mounting plate (4-2), so as to transmit the driving force of the driving device (1).

7. The dynamically switchable beamlet sorting device of claim 1, wherein: A pair of slit selection units of each group of slit clamping mechanisms (4) are respectively fixed on two adjacent slides of a plurality of front and rear arranged slides of the horizontal aluminum profile (2-3), and the radial position of each slide is adjustable.

8. The dynamically switchable beamlet sorting device of claim 7, wherein: The top of the pair of slit mounting plates (4-2) of each group of slit clamping units is slidably matched with the guide grooves of the pair of guide groove plates (4-1), and the bottom is fixedly matched with the slit plate (4-3); the top of the pair of slit mounting plates (4-2) is hinged with the pair of front and rear push rods (3-3), the driving force of two motors of each group of driving devices (1) is respectively transmitted by the pair of front and rear push rods (3-3) and respectively acts on the pair of slit mounting plates (4-2), so as to drive the pair of slit plates (4-3) to make reciprocating motion along the respective ladder-shaped slide of the pair of guide groove plates (4-1).

9. The dynamically switchable beamlet sorting device of claim 8, wherein: The pair of slit selection units of each group of slit clamping mechanisms (4) are simultaneously in working state or non-working state, when they are simultaneously in working state, the pair of slit mounting plates (4-2) are located above the steps of the ladder-shaped guide groove, and when they are simultaneously in non-working state, the pair of slit mounting plates (4-2) are located below the steps of the ladder-shaped guide groove.

10. The dynamically switchable beamlet sorting device of claim 1, wherein: The height of the slit plate (4-3) is designed to be 2-3mm above the accelerator center plane.

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