Off-line batch target manufacturing system for high-repetition-frequency freezing target

Abstract

The invention provides an off-line batch target manufacturing system for high-repetition-frequency frozen targets, and the system comprises a multi-target clamping mechanism which is used for clamping a plurality of pellets; the inflating and liquefying mechanism is used for inflating and liquefying the pellet to obtain a frozen target; and the temperature control mechanism is used for controlling the temperature of the freezing target. Target freezing is realized on the basis of an off-line batch target preparation technology, off-line batch preparation of frozen targets is realized, and the method is suitable for high-repetition-frequency frozen targets; the freezing target temperature control mechanism is used for storing the freezing target, long-term storage of the freezing target can be achieved, and the freezing and targeting efficiency of the freezing target is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of nuclear fusion cryogenic freezing targets, and in particular, to an offline batch target manufacturing system for high-repetition-rate freezing targets. Background Art

[0002] Controlled nuclear fusion, as a method for developing nuclear energy, offers advantages over nuclear fission in terms of safety, environmental friendliness, and energy density. Laser-driven fusion ignition requires focusing hundreds of high-energy laser beams and precisely aiming them at a target pellet in a defined spatial distribution. This symmetrically distributed X-ray beam compresses the fuel pellet, causing it to implode uniformly. This process is known as "laser targeting." Currently, laser targeting is performed infrequently, in part because the targets are frozen in situ and operated in a "freeze-one-shot, fire-one-shot" mode.

[0003] Through the search of existing technologies, we found that:

[0004] Dr. Harding et al. from the University of Rochester, USA, published an article titled "Producing Cryogenic Deuterium Targets for Experiments on OMEGA" in Fusion Science and Technology, 2017, 48. The article details the freezing process for OMEGA cryogenic targets. The process involves injecting fuel gas into the cryogenic target pellet at room temperature and a high pressure of 1000 atm. The fuel layer is then slowly cooled and the pressure is lowered to 26 K and 2 atm, achieving freezing. However, this method produces a rough surface for the fuel layer, and the freezing process is time-consuming and inefficient.

[0005] DW Turner et al. from the University of Rochester, USA, published an article titled “Requirements and Capabilities for Fielding Cryogenic DT-Containing Fill-Tube Targets for Direct-Drive Experiments on OMEGA” in Fusion Science and Technology, 2018, 73. The article describes in detail the freezing process of the cryogenic target using the gas-filled tube scheme. First, the cryogenic target is assembled in a clean room and sealed inside a protective cover, and then placed in the cryostat of the target shooting system. The cryostat is equipped with a gas filling pipe and a temperature control module to achieve the filling and step-by-step cooling of the fuel gas. After the fuel gas enters the cryogenic target, the temperature of the gas filling pipe is further lowered to achieve “ice competition” to prevent the leakage of the fuel gas. Subsequently, the cryogenic target fuel sphere is characterized and adjusted by diagnostic equipment such as X-rays to complete the freezing of the cryogenic target.

[0006] Hong Yang et al. from the China Academy of Engineering Physics published an article titled "Mechanical Design and Analysis of an Indirect-drive Cryogenic Target" in the Journal of Fusion Energy, 2016, 35. They describe a specially designed cryogenic target mechanical structure to form a uniform fuel ice layer within the target. Before the target firing experiment, the target was connected to a refrigerator via a silicon arm, and the interior of the cryogenic target was filled with helium to achieve internal cooling. Fuel gas was then gradually introduced into the target, forming a fuel ice layer. During the fuel solidification process, temperature sensors, heaters, and an imaging system worked together to create a regular thermal gradient, resulting in a uniform ice layer.

[0007] Patent application publication number CN115862898A discloses a vacuum cryogenic platform and a method for inflating and freezing a frozen target pellet. The platform includes: a vacuum hood, which provides mechanical form and physical support; a vacuum pump, which provides a pure environment and vacuum insulation; a cold screen, which isolates the room temperature environment outside the vacuum pump and provides primary temperature control for the target pellet gas; the vacuum hood and cold screen are equipped with a removable flange, an air inlet valve, a removable cavity, and an observation window; a cryogenic copper block, which is located within the cold screen; a target holder fixture, one end of which is fixed to the side wall of the cryogenic copper block and the other end is used to clamp the frozen target holder and conduct the temperature of the cryogenic copper block to it; and connecting hoses, which guide the input gas from the air inlet valve to the frozen target holder, with at least one connecting hose passing through the cryogenic copper block. However, this method is only suitable for in-situ pre-freezing experiments and requires optimization of the frozen target preparation process, but cannot be used for offline batch preparation of frozen targets.

[0008] In summary, the frozen targets currently used in laser target shooting are all produced in situ, using a "freeze one shot, fire one shot" model. This is cumbersome and inefficient, making it unsuitable for high-repetition-rate frozen target shooting and unable to meet the needs of commercial nuclear fusion. Therefore, there is an urgent need for an efficient, easy-to-use, offline batch target production system suitable for high-repetition-rate frozen target shooting. Summary of the Invention

[0009] In view of one of the defects in the prior art, the purpose of this application is to provide an offline batch target making system for high-repetition-rate frozen targets.

[0010] The present application provides an off-line batch target manufacturing system for high-repetition-rate frozen targets, comprising:

[0011] A multi-target clamping mechanism for clamping multiple target pellets;

[0012] an inflation and liquefaction mechanism, used for inflating and liquefying the target pellet to obtain a frozen target;

[0013] The temperature control mechanism is used to control the temperature of the freezing target.

[0014] Optionally, the multi-target clamping mechanism includes:

[0015] frame;

[0016] A plurality of clamping members are arranged at intervals along the height direction of the frame, and the clamping members are used to clamp the target pellet.

[0017] Optionally, the multi-target clamping mechanism is made of a material having a thermal conductivity greater than a preset value.

[0018] Optionally, the inflation and liquefaction mechanism includes:

[0019] A wire harness inflation mechanism for inflating and freezing targets;

[0020] The homogenizing mechanism is used to homogenize the surface of the fuel spherical shell after freezing.

[0021] Optionally, the harness inflation mechanism comprises:

[0022] A main inflation pipe and multiple branch inflation pipes connected to the main inflation pipe;

[0023] A clamp for clamping the sub-inflating pipe; the sub-inflating pipe is provided with a control valve for controlling the inlet of fuel;

[0024] An auxiliary inflation tube, wherein the tube opening at one end of the auxiliary inflation tube is perpendicular to the clamp and connected to the sub-inflation tube, and the other end is aligned with the freezing target.

[0025] Optionally, the homogenization mechanism adopts infrared homogenization equipment.

[0026] Optionally, the temperature control mechanism includes:

[0027] Cold source, used to provide the required cooling capacity for the entire system;

[0028] A heater, used to provide a heat source for the system;

[0029] Sensor, used to obtain the real-time temperature of the system;

[0030] a temperature controller, connected to the cold source, the sensor and the heater, respectively, for adjusting the operating power of the cold source and the heater according to the real-time temperature of the system;

[0031] An inflation mechanism freezing sleeve, which is sleeved on the outside of each inflation tube of the wiring harness inflation mechanism and is used to control the internal temperature environment of each inflation tube of the wiring harness inflation mechanism to achieve liquefaction of fuel gas;

[0032] The constant temperature cover is used to provide a low temperature constant temperature environment for the freezing target.

[0033] Optionally, the cold source adopts a helium compressor system.

[0034] Optionally, the cold source is connected to the multi-target clamping mechanism via a temperature conducting rod.

[0035] Optionally, the constant temperature cover includes an inner constant temperature cover and an outer constant temperature cover, the interior of the constant temperature cover is in a high vacuum state, and the constant temperature cover is opened or closed by mechanical traction.

[0036] The offline batch target making system for high-repetition-rate frozen targets provided in this application realizes target freezing based on offline batch target making technology, and realizes offline batch preparation of frozen targets, which is suitable for high-repetition-rate frozen targets; the frozen targets are preserved by a frozen target temperature control mechanism, which can realize long-term storage of frozen targets, greatly improving the efficiency of frozen target freezing and target shooting.

[0037] Other technical effects brought about by the additional features will be further explained in the corresponding embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0039] Figure 1 is a cross-sectional schematic diagram of an offline batch target manufacturing system for high-repetition-rate frozen targets according to an exemplary embodiment;

[0040] Figure 2 is a structural schematic diagram of a freezing mechanism according to an exemplary embodiment;

[0041] Figure 3 is a schematic diagram of a partial structure of a multi-target clamping mechanism according to an exemplary embodiment;

[0042] Figure 4 1 is a schematic diagram of the overall structure of a multi-target clamping mechanism according to an exemplary embodiment;

[0043] Figure 5 1 is a schematic diagram of the overall structure of a wiring harness inflation mechanism according to an exemplary embodiment;

[0044] Figure 6 is a schematic diagram of a partial structure of a wiring harness inflation mechanism according to an exemplary embodiment;

[0045] Figure 7This is a schematic flow chart of an offline batch target manufacturing system for high-repetition-rate cryogenic targets according to an exemplary embodiment, wherein: (a) shows the assembly of the cryogenic target body into a multi-target clamping mechanism; (b) shows the deployment of the retractable temperature-conducting rod, which controls the temperature step by step to provide a stable temperature environment for the cryogenic target freezing experiment; (c) shows the connection of the inflation tube system to the cryogenic target auxiliary inflation tube, and the opening of the control valve to complete the liquefied fuel gas filling; (d) shows the detachment of the wiring harness inflation tube system, and the traction and closure of the internal constant temperature cover to provide a stable internal temperature environment; (e) shows the retractable temperature-conducting rod retracting to the cold source to prepare for cryogenic target transportation;

[0046] In the figure: 1 is a pressure vessel, 2 is a constant temperature cover, 3 is a cold source, 4 is a temperature conducting rod, 5 is a freezing mechanism, 6 is a harness inflation mechanism, 4-1 is a first-level temperature conducting rod, 4-2 is a second-level temperature conducting rod, 4-3 is a third-level temperature conducting rod, 4-4 is a fourth-level temperature conducting rod, 5-1 is a temperature conducting I-shaped rod, 5-2 is a multi-target clamping mechanism, 5-3 is an inner constant temperature cover, 6-1 is a fixture, 6-2 is a control valve, 6-3 is a sub-inflating pipe, and 6-4 is an auxiliary inflating pipe. DETAILED DESCRIPTION

[0047] The present application is described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present application, but are not intended to limit the present application in any form. It should be noted that, without departing from the concept of the present application, a number of variations and improvements may be made by those skilled in the art, and these all fall within the scope of protection of the present application. Parts not described in detail in the following examples may be implemented using existing technologies.

[0048] Existing laser target shooting has shortcomings such as cumbersome operation and low efficiency, making it unsuitable for high-repetition-rate frozen target shooting and unable to meet the needs of commercial nuclear fusion. Based on the above problems, the present embodiment provides an offline batch target production system for high-repetition-rate frozen targets to solve the above problems.

[0049] Reference Figure 1 and Figure 2 As shown, in one embodiment of the present application, an offline batch target making system for high-repetition-rate frozen targets includes a multi-target clamping mechanism 5-2, an aeration and liquefaction mechanism, and a temperature control mechanism. The multi-target clamping mechanism 5-2 is used to clamp multiple target pellets; the aeration and liquefaction mechanism is used to inflate and liquefy the target pellets to obtain frozen targets; and the temperature control mechanism is used to control the temperature of the frozen targets.

[0050] Specifically, the offline batch target making system for high-repetition-rate frozen targets needs to meet the requirements of offline, automated and rapid target making, and can store the prepared frozen targets. To meet the above requirements, the system in the embodiment of the present application realizes the separation of target shooting and target making through an offline target making mechanism, which greatly improves the efficiency of frozen target shooting, can realize the batch preparation of frozen targets, and provides a solution for achieving rapid shooting of high-repetition-rate frozen targets.

[0051] The above-mentioned embodiments of the present application realize target freezing based on offline batch target making technology, and realize rapid batch preparation of frozen targets, which is suitable for high-repetition-rate frozen targets; the frozen targets are preserved by a frozen target temperature control mechanism, which can realize long-term storage of frozen targets, greatly improving the efficiency of frozen target freezing and high-repetition-rate target shooting.

[0052] In order to achieve the clamping of multiple freezing targets, in some specific embodiments of the present application, refer to Figure 3 and Figure 4 As shown, the multi-target clamping mechanism 5-2 includes a frame and a plurality of clamping members, which are arranged at intervals along the height direction of the frame, and the clamping members are used to clamp the target pellets.

[0053] Specifically, the frame serves as a support and contains square fixing holes for securing clamps that act as limiters. Four clamps can hold a single cryotarget, and multiple cryotargets can be clamped as needed, achieving integrated temperature-controlled freezing. The multi-target clamping mechanism 5-2 is constructed from a material with a thermal conductivity greater than a preset value. This material, including but not limited to copper, replaces the silicon arm structure of conventional cryotarget freezing systems. High-thermal-conductivity materials conduct heat quickly, distribute temperature evenly, and maintain a temperature close to that at the temperature source, facilitating precise temperature control.

[0054] The silicon arms used in the prior art are relatively fragile, and their manufacturing process is complex and expensive. Compared to silicon arms, the multi-target clamping mechanism 5-2 in the above-described embodiment of the present application is reusable. The high thermal conductivity material, typically a metal, is easily machined, inexpensive, and can be mass-produced. Furthermore, it is relatively robust.

[0055] In the above embodiment of the present application, the multi-target clamping mechanism 5-2 can clamp multiple frozen targets at the same time to achieve batch target production.

[0056] In some specific embodiments of the present application, the inflation and liquefaction mechanism includes a wire harness inflation mechanism 6 and a homogenization mechanism. The wire harness inflation mechanism 6 is used to inflate the frozen target; the homogenization mechanism is used to homogenize the surface of the fuel sphere after freezing to reduce the surface roughness of the fuel sphere.

[0057] In order to realize the inflation and freezing of the pellet, in some specific embodiments of the present application, reference is made to Figure 5 and Figure 6As shown, the wiring harness inflation mechanism 6 includes a main inflation pipe and multiple branch inflation pipes 6-3 connected to the main inflation pipe; it also includes a clamp 6-1 and an auxiliary inflation pipe 6-4, the clamp 6-1 is used to clamp the branch inflation pipe 6-3; the branch inflation pipe 6-3 is provided with a control valve 6-2 for controlling the entry of fuel; the pipe mouth at one end of the auxiliary inflation pipe 6-4 is perpendicular to the clamp 6-1 and connected to the branch inflation pipe 6-3, and the other end is aligned with the freezing target.

[0058] Specifically, the main inflation tube (not shown) is the main passage for gas. It has only one bundle, which is divided into multiple sub-inflation tubes 6-3 as needed. The sub-inflation tubes 6-3 are equipped with control valves 6-2 and are connected to the auxiliary inflation tubes 6-4 on the freezing target to complete the input of fuel gas. The sub-inflation tubes 6-3 correspond one-to-one with the auxiliary inflation tubes 6-4. The diameter of the sub-inflation tubes is larger than that of the auxiliary inflation tubes, and the two are sealed and connected. During fuel filling, the sub-inflation tubes 6-3 are connected to the auxiliary inflation tubes 6-4. After filling is completed, the clamp 6-1 is moved to remove the sub-inflation tubes 6-3 and separate them from the auxiliary inflation tubes 6-4.

[0059] Illustratively, fixture 6-1 is a controllable, movable mechanical micro-clamp, which holds the sub-inflating line in the movable mechanical micro-clamp to achieve automated tracheal separation. Control valve 6-2 is an electric valve. Tracheal tube materials include, but are not limited to, PI tubes and laser-drawn tapered borosilicate glass tubes.

[0060] Specifically, the working process of the wiring harness inflation mechanism 6 is as follows: the main inflation pipe is connected to the sub-inflation pipe 6-3, the clamp 6-1 clamps the sub-inflation pipe 6-3, and a control valve 6-2 is set on each sub-inflation pipe 6-3. First, the control valve 6-2 is closed, and the fuel gas is continuously filled into the sub-inflation pipe 6-3, and the temperature is lowered to liquefy the fuel gas. A mechanical control clamp is used in the target room to move the sub-inflation pipe 6-3 to the position of the auxiliary inflation pipe 6-4. This process is similar to the structure of a robotic arm, and it can be moved to a designated fixed position. After the precise docking is completed, the control valve 6-2 on the sub-inflation pipe 6-3 is opened to allow the liquid fuel to flow into the surface of the foam shell inside the upper and lower compression cones, and the fuel gas is liquefied and filled inside.

[0061] In the above embodiment of the present application, the wiring harness inflation mechanism 6 includes a main inflation pipe and a sub-inflation pipe 6-3, and each sub-inflation pipe 6-3 is provided with a control valve 6-2 to control the entry of fuel, thereby achieving controllability of the fuel entry.

[0062] In order to homogenize the surface of the fuel sphere, in some specific embodiments of the present application, the homogenization mechanism uses infrared homogenization equipment.

[0063] It should be noted that, in addition to the infrared homogenization method, other types of homogenization mechanisms can also be used.

[0064] In some specific embodiments of the present application, the temperature control mechanism includes a cold source 3, a heater, a sensor, a temperature controller, an inflation mechanism freezing sleeve and a constant temperature cover 2. The cold source 3 is used to provide the required cooling capacity for the entire system, and the inflation liquefaction mechanism is connected to the cold source 3; the heater is used to provide a heat source for the system, and cooperates with the cold source 3 to achieve temperature control of the system; the sensor is used to obtain the real-time temperature of the system; the temperature controller is respectively connected to the cold source 3, the sensor and the heater, and it monitors the temperature in real time, and is used to adjust the working power of the cold source 3 and the heater according to the real-time temperature of the system to achieve precise temperature control; the inflation mechanism freezing sleeve is arranged on the outside of each inflation tube of the wiring harness inflation mechanism 6, and is used to control the internal temperature environment of each inflation tube of the wiring harness inflation mechanism 6 to achieve liquefaction of the fuel gas; the constant temperature cover 2 is used to provide a low-temperature constant temperature environment for the freezing target.

[0065] Specifically, the freezing sleeve of the inflation mechanism controls the temperature of the suspended inflation tube, ensuring that the fuel gas is filled in the form of liquid, while also playing a supporting role.

[0066] In some specific embodiments of the present application, a helium compressor system is used for the cold source 3 .

[0067] In some specific embodiments of the present application, the cold source 3 is connected to the multi-target clamping mechanism 5 - 2 via a temperature conducting rod 4 .

[0068] Specifically, the temperature conducting rod 4 is a retractable temperature conducting rod, and the freezing mechanism 5 is arranged at the top of the retractable temperature conducting rod; the bottom end of the retractable temperature conducting rod is connected to the cold source 3; the retractable temperature conducting rod is connected to the multi-target clamping mechanism of the freezing mechanism 5 to realize offline freezing of the frozen target and refrigeration temperature control during transportation.

[0069] It should be noted that the multi-target clamping mechanism 5 - 2 is detachable, and its frame is connected to the temperature conducting rod 4 in the temperature control mechanism during use.

[0070] In order to realize the retractability of the temperature conducting rod 4, in some specific embodiments of the present application, as Figure 2 As shown, the retractable temperature conducting rod includes one to four levels of temperature conducting rods, wherein: one end of the first-level temperature conducting rod 4-1 is connected to the top of the cold source 3; one end of the second-level temperature conducting rod 4-2 is arranged inside the other end of the first-level temperature conducting rod; one end of the third-level temperature conducting rod 4-3 is arranged inside the other end of the second-level temperature conducting rod 4-2; one end of the fourth-level temperature conducting rod 4-4 is arranged inside the other end of the third-level temperature conducting rod 4-3, and the freezing mechanism 5 is arranged at the other end of the fourth-level temperature conducting rod 4-4. Each level of temperature conducting rod is provided with a temperature sensor and a heater.

[0071] Specifically, the retractable temperature-conducting rod can be made retractable using a guide chain or other means. Each level of the temperature-conducting rod is embedded with a high-precision temperature sensor and heater for graded temperature control. This allows for step-by-step temperature control during target preparation, facilitating higher precision and facilitating the freezing of the target fuel sphere. During target transport, to avoid external vibration, the temperature-conducting rod 4 retracts, lowering its center while maintaining a certain temperature range to ensure the fuel remains in liquid form. The temperature error is approximately 5K, reducing the required temperature control accuracy.

[0072] In addition, during the operation of the harness inflation mechanism 6, the retractable temperature conducting rod can be controlled by the cold source 3 (cryostat) to achieve high-precision temperature control of the frozen target holder, thereby forming a solid spherical shell structure.

[0073] In the above-mentioned embodiment of the present application, temperature gradient control can be achieved through a four-stage retractable temperature conducting rod.

[0074] In order to realize the connection between the freezing mechanism 5 and the retractable temperature conducting rod, in some specific embodiments of the present application, the multi-target clamping mechanism 5-2 is connected to the retractable temperature conducting rod through the temperature conducting I-shaped rod 5-1; one end of the temperature conducting I-shaped rod 5-1 is connected to the top end of the retractable guide rod, and the other end of the temperature conducting I-shaped rod 5-1 is provided with a semi-I-shaped opening, and mounting parts are provided on both sides of the frame, and the mounting parts match the openings.

[0075] Specifically, the opening of the heat-conducting I-shaped rod 5-1 is I-shaped. For a single frozen target, the system requires four clamping members (two on top and two on the bottom) to secure the target and conduct heat. This structure, similar to a clamp, allows the target to be positioned in the center, so the I-shaped rod facilitates target clamping. Furthermore, the temperature on either side of the I-shaped rod can be controlled separately, achieving more precise temperature control.

[0076] In some specific embodiments of the present application, the constant temperature cover 2 includes an inner constant temperature cover 5-3 and an outer constant temperature cover. The interior of the constant temperature cover 2 is in a high vacuum state. The constant temperature cover 2 is located outside the device, and the cold source 3 is located at the bottom of the constant temperature cover 2.

[0077] In the above embodiment of the present application, the device is provided with two layers of constant temperature covers, which can effectively control the temperature and ensure the stability of the fuel layer of the target freezing target during the storage process.

[0078] In order to facilitate the opening and closing of the constant temperature cover 2, in some specific embodiments of the present application, the constant temperature cover 2 is a traction closed structure, and the constant temperature cover 2 is opened or closed by mechanical traction.

[0079] Taking the number of targets produced at one time as 10 as an example, the process of offline batch target production using the system in the above embodiment of the present application is as follows:

[0080] Reference Figure 7As shown, first, a multi-target clamping mechanism 5-2 is designed to realize target pre-assembly, as shown in FIG. Figure 7 As shown in (a), it can replace the traditional silicon arm structure. After completing the micro-assembly of the sleeve, gold cone and foam spherical shell, the 10 targets are assembled on the clamping part of the multi-target clamping mechanism 5-2 and connected to the retractable temperature conducting rod, as shown in FIG. Figure 7 (b) Figure 7 As shown in (c), the position of the auxiliary inflation tube 6-4 is adjusted to accurately locate it at the position of the spherical shell inside the frozen target, and the auxiliary inflation tube mouth is perpendicular to the clamp 6-1. When the gas electric control valve is closed, the fuel gas is continuously filled into the sub-inflation tube 6-3, and the cold source 3 is started to control the temperature step by step through the retractable temperature conducting rod to liquefy the fuel gas. The sub-inflation tube 6-3 is moved to the position of the auxiliary inflation tube 6-4 by mechanical control in the target chamber. After the precise docking is completed, the electric valve of the sub-inflation tube is opened to allow the liquid fuel to flow into the surface of the foam spherical shell. At this time, the retractable temperature conducting rod is further controlled by the cold source 3 to finally achieve high-precision temperature control of the clamp and form a solid spherical shell structure. In order to reduce the surface roughness of the fuel spherical shell, infrared homogenization equipment is used for surface treatment. After the inflation and freezing is completed, the electric valve on the sub-inflation tube 6-3 is closed, the mechanical clamp is controlled to move, and the main inflation tube is moved outward. In order to ensure the temperature stability of the target pellet, the constant temperature cover 2 is closed using a mechanical traction device, as shown in FIG. Figure 7 As shown in (d), the temperature conducting rod 4 is retracted and close to the low temperature cooling source 3, as shown in FIG. Figure 7 (e) shown.

[0081] Taking the number of targets produced at one time as 10 as an example, the offline batch target production method for high-repetition-rate frozen targets using the system in the above embodiment of the present application includes:

[0082] 1) The cryotarget body is assembled outside the liquefaction freezing system. The sleeve is the external structure of the cryotarget body, and the interior contains upper and lower compression gold cones and side heating gold cones. The spherical shell is placed inside the upper and lower compression gold cones. The position of the auxiliary inflation tube 6-4 is adjusted to accurately position the spherical shell inside the cryotarget. The sleeve, gold cone, and foam spherical shell are manually assembled.

[0083] 2) Place the assembled frozen target in the designed multi-target clamping mechanism. For example, assemble a 10-shot target in the multi-target clamping mechanism and adjust the position so that the auxiliary inflation pipe opening is perpendicular to the clamp 6-1.

[0084] 3) Connecting the assembled freezing target holding device to the retractable temperature conducting rod inside the movable cryostat, controlling the temperature gradient through the retractable temperature conducting rod to prepare for batch target freezing, and then placing the target in the pressure vessel 1, and performing aeration freezing inside the pressure vessel 1;

[0085] 4) The main inflation tube 6-3 is mechanically controlled to move to the auxiliary inflation tube 6-4 in the target chamber to achieve precise docking;

[0086] 5) Lower the system temperature to 18.3K and keep it stable. Open the electric valve of the gas distribution pipe to allow the liquid fuel to flow into the surface of the foam shell.

[0087] 6) Further reduce the temperature of the multi-target clamping system to convert the fuel from liquid to solid, and then use infrared homogenization equipment to perform surface treatment to reduce the surface roughness of the fuel sphere shell;

[0088] 7) After the inflation and freezing are completed, the electric valve on the sub-inflation pipe 6-3 is closed, the mechanical clamp is controlled to move, the main inflation pipe is moved outward, and the closed constant temperature cover 2 is pulled closed in sequence using a mechanical tractor.

[0089] It should be noted that the system in the above embodiment of the present application can realize offline batch target production not limited to 10 rounds, and can realize batch freezing of more target pellets at the same time as needed, greatly improving the target production efficiency.

[0090] The preferred features of the above embodiments can be used alone in any embodiment, or in any combination without conflict. In addition, parts not described in detail in the embodiments can be implemented using existing technologies.

[0091] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0093] In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly specified and specifically defined. In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0094] In the embodiments of the present application, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to the process, method, product, or apparatus.

[0095] The above describes some specific embodiments of the present application. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art may make various variations or modifications within the scope of the claims, which do not affect the substantive content of the present application. The above preferred features may be used in any combination as long as they do not conflict with each other.

Claims

1. An offline batch target making system for high repetition rate frozen targets, characterized in that: include: A multi-target clamping mechanism for clamping multiple target pellets; an inflation and liquefaction mechanism, used for inflating and liquefying the target pellet to obtain a frozen target; The temperature control mechanism is used to control the temperature of the freezing target.

2. The off-line batch target making system for high repetition rate frozen targets according to claim 1, characterized in that: The multi-target clamping mechanism comprises: frame; A plurality of clamping members are arranged at intervals along the height direction of the frame, and the clamping members are used to clamp the target pellet.

3. The off-line batch target making system for high repetition rate frozen targets according to claim 1, characterized in that: The material of the multi-target clamping mechanism is a material having a thermal conductivity greater than a preset value.

4. The off-line batch target making system for high repetition rate frozen targets according to claim 1, characterized in that: The gas-filling and liquefying mechanism comprises: A wire harness inflation mechanism for inflating and freezing targets; The homogenizing mechanism is used to homogenize the surface of the fuel spherical shell after freezing.

5. The off-line batch target making system for high repetition rate frozen targets according to claim 4, characterized in that: The wiring harness inflation mechanism comprises: A main inflation pipe and multiple branch inflation pipes connected to the main inflation pipe; A clamp for clamping the sub-inflating pipe; the sub-inflating pipe is provided with a control valve for controlling the inlet of fuel; An auxiliary inflation tube, wherein the tube opening at one end of the auxiliary inflation tube is perpendicular to the clamp and connected to the sub-inflation tube, and the other end is aligned with the freezing target.

6. The off-line batch target making system for high repetition rate frozen targets according to claim 4, characterized in that: The homogenizing mechanism adopts infrared homogenizing equipment.

7. The off-line batch target making system for high repetition rate frozen targets according to claim 4, characterized in that: The temperature control mechanism comprises: Cold source, used to provide the required cooling capacity for the entire system; A heater, used to provide a heat source for the system; Sensor, used to obtain the real-time temperature of the system; a temperature controller, connected to the cold source, the sensor and the heater, respectively, for adjusting the operating power of the cold source and the heater according to the real-time temperature of the system; An inflation mechanism freezing sleeve, which is sleeved on the outside of each inflation tube of the wiring harness inflation mechanism and is used to control the internal temperature environment of each inflation tube of the wiring harness inflation mechanism to achieve liquefaction of fuel gas; The constant temperature cover is used to provide a low temperature constant temperature environment for the freezing target.

8. The off-line batch target making system for high repetition rate frozen targets according to claim 7, characterized in that: The cold source adopts a helium compressor system.

9. The off-line batch target making system for high repetition rate frozen targets according to claim 7, characterized in that: The cold source is connected to the multi-target clamping mechanism through a temperature conducting rod.

10. The off-line batch target making system for high repetition rate frozen targets according to claim 7, characterized in that: The constant temperature cover comprises an inner constant temperature cover and an outer constant temperature cover. The interior of the constant temperature cover is in a high vacuum state, and the constant temperature cover is opened or closed by mechanical traction.

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