Ultrasonic molecular beam injection system for fusion devices and methods of using the same

Abstract

The application relates to the technical field of nuclear fusion, and discloses an ultrasonic molecular beam injection system for a fusion device and a use method thereof, wherein the ultrasonic molecular beam injection system comprises a gas source, a pressurizing unit, a storage unit and an injection unit; the pressurizing unit comprises a gas conveying pipeline, two ends of the gas conveying pipeline are communicated with the gas source and the storage unit respectively, a pressurizing pump is arranged on the gas conveying pipeline, the pressurizing pump is used for pressurizing the gas in a direction away from the gas source, and the storage unit can receive and store the pressurized gas so that the gas reaches a preset pressure value; the injection unit comprises an injection pipeline and a nozzle, one end of the injection pipeline is communicated with the storage unit, the other end is provided with the nozzle, the nozzle is used for extending into a tokamak vacuum chamber of the fusion device, and the injection pipeline can convey the gas in the storage unit to the nozzle so as to form an ultrasonic molecular beam flow through the nozzle. The application can realize the injection function of the ultrasonic molecular beam flow in a large fusion device.

Description

Technical Field

[0001] This invention relates to the field of nuclear fusion device technology, and in particular to an ultrasonic molecular beam injection system for fusion devices and its method of use. Background Technology

[0002] During the discharge process of a tokamak device, fuel particles need to be continuously injected into the tokamak vacuum chamber to maintain and increase plasma density. Currently, traditional plasma feeding methods typically involve installing nozzles around the tokamak device, using ultrasonic molecular beams generated by the nozzles to inject high-speed particles into the plasma. However, with the increasing scale of fusion devices, the ultrasonic molecular beam injection distance of this method is insufficient, making it difficult for the beam generated by the nozzles to directly inject high-speed particles into the plasma, thus failing to meet the plasma feeding requirements of large tokamak devices. Summary of the Invention

[0003] To address the shortcomings of the prior art, the present invention aims to provide an ultrasonic molecular beam injection system and its usage method for fusion devices, with the goal of realizing the injection function of ultrasonic molecular beams in large-scale fusion devices.

[0004] To achieve the above objectives, the present invention provides an ultrasonic molecular beam injection system for a fusion device. The ultrasonic molecular beam injection system includes a gas source, a pressurization unit, a storage unit, and an injection unit. The pressurization unit includes a gas delivery pipeline, the two ends of which are respectively connected to the gas source and the storage unit. A pressurization pump is provided on the gas delivery pipeline. The pressurization pump is used to pressurize the gas in a direction away from the gas source. The storage unit can receive and store the pressurized gas so that the gas reaches a preset pressure value.

[0005] The injection unit includes an injection pipeline and a nozzle. One end of the injection pipeline is connected to the storage unit, and the other end is provided with the nozzle. The nozzle is used to extend into the tokamak vacuum chamber of the fusion device. The injection pipeline can deliver the gas in the storage unit to the nozzle to form an ultrasonic molecular beam.

[0006] In one embodiment, a first on / off valve is connected in series at the end of the booster pump facing the storage unit, and a second on / off valve is connected in series at the end of the booster pump facing the gas source. The booster unit further includes:

[0007] A first venting pipeline, the inlet of which is connected to the gas supply pipeline and located between the first on / off valve and the storage unit, and the outlet of which is connected to the gas supply pipeline and located between the second on / off valve and the booster pump, and a third on / off valve is provided on the first venting pipeline; and

[0008] The second venting pipeline has an inlet end connected to the gas supply pipeline and located between the booster pump and the first on / off valve. The outlet end of the second venting pipeline is connected to the gas supply pipeline and located between the second on / off valve and the gas source. A fourth on / off valve is provided on the second venting pipeline.

[0009] In one embodiment, the pressurization unit further includes a vacuum line, one end of which is connected to the first venting line, and a vacuum mechanism is provided on the vacuum line.

[0010] In one embodiment, the vacuum pumping mechanism includes a molecular pump and a mechanical pump, which are connected in series on the vacuum pumping pipeline, with the mechanical pump located at the end of the molecular pump away from the first venting pipeline.

[0011] In one embodiment, the storage unit includes a main pipeline, a first branch pipeline, and a second branch pipeline. One end of the main pipeline is connected to the gas transmission pipeline, and a gas storage mechanism is provided on the main pipeline. The first branch pipeline and the second branch pipeline are arranged in parallel between the main pipeline and the injection pipeline.

[0012] The first branch pipeline is equipped with a fifth on / off valve, and the second branch pipeline is equipped with a high-frequency solenoid valve and two sixth on / off valves connected in series, with the two sixth on / off valves located at opposite ends of the high-frequency solenoid valve.

[0013] In one embodiment, multiple second branch pipes are provided, and the multiple second branch pipes are connected in parallel with the first branch pipe.

[0014] In one embodiment, the injection conduit includes at least three interconnected straight pipe sections, with the extension directions of two adjacent straight pipe sections arranged at an angle.

[0015] In one embodiment, the ultrasonic molecular beam injection system further includes a first shielding assembly having a first shielding chamber housing the pressurization unit, and the first shielding assembly also having a first detection and collection mechanism for detecting and collecting leaked gas in the first shielding chamber, and / or, the ultrasonic molecular beam injection system further includes a second shielding assembly having a second shielding chamber housing the storage unit, and the second shielding assembly also having a second detection and collection mechanism for detecting and collecting leaked gas in the second shielding chamber.

[0016] The present invention also proposes a method for using an ultrasonic molecular beam injection system, employing any of the ultrasonic molecular beam injection systems described above, the method of using the ultrasonic molecular beam injection system comprising the following steps:

[0017] The interior of the ultrasonic molecular beam injection system is evacuated;

[0018] The pressurization unit pressurizes the gas at the gas source and delivers it to the storage unit so that the gas pressure stored in the storage unit reaches a preset pressure value.

[0019] The injection line delivers gas from the storage unit to the nozzle to form an ultrasonic molecular beam through the nozzle.

[0020] In one embodiment, the method of using the ultrasonic molecular beam injection system further includes: isolating the storage unit and the injection unit, and re-extracting the gas in the storage unit through the pressurization unit.

[0021] This invention provides an ultrasonic molecular beam injection system and its usage method, which have the following advantages compared with the prior art:

[0022] The ultrasonic molecular beam injection system of this invention includes a gas source, a pressurization unit, a storage unit, and an injection unit. The pressurization unit delivers gas from the gas source to the storage unit via a gas supply line. During this process, a pressurization pump on the gas supply line pressurizes the gas in a direction away from the gas source, enabling the storage unit to receive and store the pressurized gas. Furthermore, the high-pressure gas in the storage unit can be delivered to the nozzle via the injection line of the injection unit. This invention pressurizes the gas to be injected through a pressurization unit and receives and stores the pressurized gas through a storage unit. This ensures that the high-pressure gas stored in the storage unit reaches a preset pressure value before being transmitted to the nozzle through an injection pipeline. This ensures that the gas has sufficient pressure when it reaches the nozzle, enabling the nozzle to form an ultrasonic molecular beam and further increasing the ultrasonic molecular beam injection distance. Furthermore, compared to the traditional method of placing the nozzle on the periphery of the fusion device, the technical solution of this invention places the nozzle in the tokamak vacuum chamber of the fusion device, allowing the nozzle to be as close to the plasma as possible. This ensures that the ultrasonic molecular beam generated can be directly injected into the plasma, thereby realizing the ultrasonic molecular beam injection function in large-scale fusion devices. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the ultrasonic molecular beam injection system described in an embodiment of the present invention;

[0024] Figure 2 This is the present invention. Figure 1 A partial structural diagram of the ultrasonic molecular beam injection system in the image;

[0025] Figure 3 This is the present invention. Figure 1 Another partial structural diagram of the ultrasonic molecular beam injection system in the image;

[0026] Figure 4 This is a schematic flowchart illustrating the usage method of the ultrasonic molecular beam injection system described in an embodiment of the present invention.

[0027] In the diagram, 100 is the ultrasonic molecular beam injection system; 10 is the gas source; 20 is the pressurization unit; 21 is the gas delivery pipeline; 211 is the booster pump; 212 is the first on / off valve; 213 is the second on / off valve; 22 is the first venting pipeline; 221 is the third on / off valve; 23 is the second venting pipeline; 231 is the fourth on / off valve; 24 is the vacuum pipeline; 241 is the vacuum mechanism; 241a is the molecular pump; 241b is the mechanical pump; 30 is the storage unit; 31 is the main pipeline; 311 is the gas storage mechanism; 32 is the first branch pipeline; 321 is the fifth on / off valve; 33 is the second branch pipeline; 331 is the sixth on / off valve; 332 is the high-frequency solenoid valve; 40 is the injection unit; 41 is the injection pipeline; 411 is the straight pipe section; 42 is the nozzle; 50 is the first shielding assembly; 60 is the first detection and collection mechanism; 70 is the second shielding assembly; and 80 is the second detection and collection mechanism. Detailed Implementation

[0028] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] It should be understood that the terms "before," "after," etc., are used in this invention to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, "before" information can also be called "after" information, and "after" information can also be called "before" information, without departing from the scope of this invention.

[0030] like Figures 1 to 3 As shown in the figure, an ultrasonic molecular beam injection system 100 for a fusion device is provided in an embodiment of the present invention. The fusion device has a tokamak vacuum chamber. The ultrasonic molecular beam injection system 100 includes a gas source 10, a pressurization unit 20, a storage unit 30, and an injection unit 40. The pressurization unit 20 includes a gas supply pipeline 21, the two ends of which are connected to the gas source 10 and the storage unit 30, respectively. A pressurization pump 211 is provided on the gas supply pipeline 21. The pressurization pump 211 is used to pressurize the gas in a direction away from the gas source 10. The storage unit 30 can receive and store the pressurized gas so that the gas reaches a preset pressure value. The injection unit 40 includes an injection pipeline 41 and a nozzle 42. One end of the injection pipeline 41 is connected to the storage unit 30, and the other end can extend into the tokamak vacuum chamber and is provided with a nozzle 42. The injection pipeline 41 can deliver the gas in the storage unit 30 to the nozzle 42 so as to form an ultrasonic molecular beam through the nozzle 42.

[0031] The gas provided by the gas source 10 can be, but is not limited to, tritium. The nozzle 42 of the injection unit 40 can be specifically configured as a Laval nozzle, which has a constriction section, a throat, and an expansion section connected together. The cross-sectional area of ​​the constriction section gradually decreases in the direction towards the throat, so that the transmission speed of the gas increases accordingly when passing through the constriction section. The throat is the narrowest part of the Laval nozzle. After the gas passes through the constriction section and reaches the throat, its speed can approach or reach the speed of sound. The cross-sectional area of ​​the expansion section gradually increases in the direction away from the throat, so that the gas gradually expands when passing through the expansion section, thereby enabling the gas to convert internal energy into kinetic energy during the expansion process, thereby generating a hypersonic ultrasonic molecular beam. In one feasible embodiment, the constriction section of the nozzle 42 is conical, and its cone angle can be set to 50°; the inner diameter of the throat can be set to 0.5 mm, and the expansion section is conical, and its cone angle can be set to 40°. Specific implementations can be set according to actual needs and are not limited here.

[0032] In some embodiments, to obtain the gas pressure in the ultrasonic molecular beam injection system 100 in real time, a pressure gauge can be set to detect the pressure in the gas delivery line 21. In a feasible embodiment, the pressurization unit 20 further includes two pressure detection lines. One pressure detection line is connected at one end to the gas delivery line 21 and is located between the pressurization pump 211 and the gas source 10, and a pressure gauge is provided at the other end of the pressure detection line. The other pressure detection line is connected at one end to the gas delivery line 21 and is located between the pressurization pump 211 and the storage unit 30, and a pressure gauge is provided at the other end of the pressure detection line. Further, each pressure detection line can also be provided with an on / off valve, which can be connected in series at the end of the pressure gauge facing the gas delivery line 21. Thus, the on / off status of the pressure detection line can be controlled by the on / off valve. When the pressure detection line is connected, the gas pressure in the gas delivery line 21 upstream and downstream of the pressurization pump 211 can be detected by the pressure gauge.

[0033] It is understood that the present invention pressurizes the gas to be injected through the pressurization unit 20 and receives and stores the pressurized gas through the storage unit 30. This allows the high-pressure gas stored in the storage unit 30 to reach a preset pressure value before being transmitted to the nozzle 42 through the injection pipeline 41. This ensures that the gas has sufficient pressure when it is transmitted to the nozzle 42, so that the nozzle 42 can form an ultrasonic molecular beam and further increase the ultrasonic molecular beam injection distance. Moreover, compared with the traditional method of placing the nozzle 42 on the periphery of the fusion device, the technical solution of the present invention places the nozzle 42 in the tokamak vacuum chamber of the fusion device, so that the nozzle 42 is as close to the plasma as possible, ensuring that the ultrasonic molecular beam generated can be directly injected into the plasma, thereby realizing the ultrasonic molecular beam injection function in large fusion devices.

[0034] like Figure 2 As shown, in this embodiment of the invention, a first on / off valve 212 is connected in series at the end of the booster pump 211 facing the storage unit 30, and a second on / off valve 213 is connected in series at the end of the booster pump 211 facing the gas source 10. The booster unit 20 also includes a first venting pipe 22 and a second venting pipe 23. The inlet end of the first venting pipe 22 is connected to the gas supply pipe 21 and is located between the first on / off valve 212 and the storage unit 30. The outlet of the first venting pipeline 22 is connected to the gas supply pipeline 21 and is located between the second shut-off valve 213 and the booster pump 211. A third shut-off valve 221 is provided on the first venting pipeline 22. The inlet of the second venting pipeline 23 is connected to the gas supply pipeline 21 and is located between the booster pump 211 and the first shut-off valve 212. The outlet of the second venting pipeline 23 is connected to the gas supply pipeline 21 and is located between the second shut-off valve 213 and the gas source 10. A fourth shut-off valve 231 is provided on the second venting pipeline 23.

[0035] In one feasible implementation, the first shut-off valve 212 and the second shut-off valve 213 can be opened, while the third shut-off valve 221 and the fourth shut-off valve 231 can be disconnected. At this time, the gas supplied by the gas source 10 can be transmitted to the storage unit 30 via the gas supply pipeline 21, sequentially passing through the first shut-off valve 212, the booster pump 211, and the second shut-off valve 213. The storage unit 30 can then receive and store the high-pressure gas boosted by the booster pump 211. In another feasible implementation, the first shut-off valve 212 and the second shut-off valve 213 can be disconnected, while the third shut-off valve 221 and the fourth shut-off valve 231 can be opened. At this time, the first venting pipeline 22 and the second venting pipeline 23 are both connected to the gas supply pipeline 21, and the booster pump 211 can evacuate the storage unit 30. The gas in the storage unit 30 can be transmitted to the booster pump 211 via the first venting pipeline 22, and then enter the second venting pipeline 23. That is, the technical solution of the present invention can control the on / off status of the gas supply line 21, the first gas release line 22, and the second gas release line 23 by controlling the status of the first on / off valve 212, the second on / off valve 213, the third on / off valve 221, and the fourth on / off valve 231, so that the pressurization unit 20 can both deliver pressurized gas to the storage unit 30 through the pressurization pump 211 and extract gas from the storage unit 30 using the pressurization pump 211.

[0036] like Figure 2As shown, the pressurization unit 20 of this embodiment further includes a vacuuming pipeline 24, one end of which is connected to the first venting pipeline 22. A vacuuming mechanism 241 is provided on the vacuuming pipeline 24. This configuration allows the ultrasonic molecular beam injection system 100 to be vacuumed by the vacuuming mechanism 241 before the pressurization unit 20 connects to the gas source 10 and supplies gas. This helps reduce interference from impurity gases within the ultrasonic molecular beam injection system 100 and improves the beam quality generated by the ultrasonic molecular beam injection system 100. For example, in one feasible implementation, the internal pressure of the ultrasonic molecular beam injection system 100 can be first increased by the vacuuming mechanism 241 to a certain level. Next, the pressurization unit 20 is connected to the gas source 10 through the gas pipeline 21, so that the pressurization unit 20 pressurizes and transmits the gas, and stores the high-pressure gas through the storage unit 30.

[0037] Specifically, in this embodiment, the vacuuming mechanism 241 of the present invention includes a molecular pump 241a and a mechanical pump 241b, which are connected in series on the vacuuming pipeline 24, with the mechanical pump 241b located at the end of the molecular pump 241a away from the first venting pipeline 22. When performing vacuuming on the ultrasonic molecular beam injection system 100, the on / off valve connecting the ultrasonic molecular beam injection system 100 to the external environment can be closed first to isolate the ultrasonic molecular beam injection system 100 from the external environment, and the internal valves of the ultrasonic molecular beam injection system 100 can be opened to connect the internal pipelines of the ultrasonic molecular beam injection system 100. Then, vacuuming is performed through the vacuuming mechanism 241. Specifically, a preliminary vacuuming operation can be performed first using the mechanical pump 241b to quickly reduce the pressure inside the pipeline of the ultrasonic molecular beam injection system 100, and then a secondary vacuuming operation can be performed using the molecular pump 241a to further reduce the pressure inside the pipeline, thereby enabling the vacuuming mechanism 241 to meet the requirements for high vacuum.

[0038] Furthermore, multiple on / off valves can be provided on the vacuum line 24. For example, in one feasible embodiment, three on / off valves can be connected in series on the vacuum line 24, one of which is located between the molecular pump 241a and the first venting line 22, another of which is located between the molecular pump 241a and the mechanical pump 241b, and the remaining one is located at the end of the mechanical pump 241b away from the molecular pump 241a.

[0039] In some embodiments, a full-range vacuum gauge can be used to detect the vacuum pressure in the ultrasonic molecular beam injection system 100 in real time. In one feasible embodiment, the pressurization unit 20 further includes two vacuum detection lines. One end of the vacuum detection line is connected to the first venting line 22 and is located between the molecular pump 241a and the first venting line 22. The other end of the vacuum detection line is equipped with a full-range vacuum gauge. One end of the other vacuum detection line is connected to the vacuum pumping line 24 and is located between the molecular pump 241a and the mechanical pump 241b. The other end of the vacuum detection line is equipped with a full-range vacuum gauge.

[0040] like Figure 2 As shown, the storage unit 30 of this embodiment includes a main pipeline 31, a first branch pipeline 32, and a second branch pipeline 33. One end of the main pipeline 31 is connected to the gas transmission pipeline 21. A gas storage mechanism 311 is provided on the main pipeline 31. The first branch pipeline 32 and the second branch pipeline 33 are arranged in parallel between the main pipeline 31 and the injection pipeline 41. A fifth on / off valve 321 is provided on the first branch pipeline 32. A high-frequency solenoid valve 332 and two sixth on / off valves 331 are connected in series on the second branch pipeline 33, and the two sixth on / off valves 331 are respectively located at both ends of the high-frequency solenoid valve 332.

[0041] Specifically, in this embodiment, the gas storage mechanism 311 can be configured as a gas storage cylinder for storing high-pressure gas. Further, at least one pressure gauge can be installed on the gas storage cylinder to detect the pressure inside the cylinder. Exemplarily, in one feasible implementation, two pressure gauges can be connected in parallel on the gas storage cylinder, with one gauge used for real-time pressure detection and the other as a backup. This configuration helps ensure the stability of the storage unit 30.

[0042] In one feasible implementation, when the gas storage mechanism 311 of the storage unit 30 delivers high-pressure gas to the injection unit 40, the two sixth on-off valves 331 on the second branch pipeline 33 open. By opening and closing the high-frequency solenoid valve 332, the ultrasonic molecular beam can be injected, and the pulse time and injection frequency can be controlled by controlling the high-frequency solenoid valve 332. During this process, the fifth on-off valve 321 remains closed to isolate the first branch pipeline 32. The fifth on-off valve 321 can serve as a backup channel, only to be opened when it is necessary to evacuate the ultrasonic molecular beam injection system 100.

[0043] Furthermore, in this embodiment of the invention, multiple second branch pipes 33 are provided, and these multiple second branch pipes 33 are connected in parallel with the first branch pipe 32. It is understood that since the storage unit 30 may include multiple parallel second branch pipes 33, and each second branch pipe 33 is connected in series with a high-frequency solenoid valve 332 and two sixth on / off valves 331, the storage unit 30 has multiple backup pipes for high-pressure gas transmission. This arrangement helps ensure the stability of the storage unit 30. For example, in one specific embodiment, one first branch pipe 32 and three second branch pipes 33 are connected in parallel between the gas storage mechanism 311 and the injection unit 40.

[0044] like Figure 3 As shown, the injection conduit 41 of this embodiment includes at least three interconnected straight pipe sections 411, with the extending directions of two adjacent straight pipe sections 411 arranged at an angle. Specifically, the angle between two adjacent straight pipe sections 411 can be 90°. It can be understood that by making the injection conduit 41 form two bends, high-energy neutrons generated by fusion can be prevented from directly passing through the injection conduit 41.

[0045] like Figure 1 As shown, the ultrasonic molecular beam injection system 100 of this embodiment further includes a first shielding component 50, which has a first shielding chamber for housing the pressurization unit 20. The first shielding component 50 is also provided with a first detection and collection mechanism 60 for detecting and collecting leaked gas in the first shielding chamber. And / or, the ultrasonic molecular beam injection system 100 further includes a second shielding component 70, which has a second shielding chamber for housing the storage unit 30. The second shielding component 70 is also provided with a second detection and collection mechanism 80 for detecting and collecting leaked gas in the second shielding chamber.

[0046] Specifically, in this embodiment, the first shielding component 50 may include a sealed negative pressure gas holder with magnetic shielding function. Exemplarily, a first shielding chamber is formed within the sealed negative pressure gas holder, and the pressure within the first shielding chamber can be set to... By housing the pressurization unit 20 within the first shielding chamber, the gas leakage rate is reduced. Furthermore, the first shielding assembly 50 is also equipped with a first detection and collection mechanism 60, which can issue an alarm and collect leaked gas when it detects that the gas content in the first shielding chamber is too high.

[0047] Similarly, the second shielding assembly 70 may include a sealed negative pressure gas holder with a second shielding chamber, the pressure inside the second shielding chamber being set to... By housing the storage unit 30 within the first shielding chamber, the gas leakage rate is reduced. The second shielding assembly 70 is also provided with a second detection and collection mechanism 80, which can issue an alarm and collect leaked gas when it detects that the gas content in the second shielding chamber is too high.

[0048] It is understood that the technical solution of the present invention, by setting a first shielding component 50 and a second shielding component 70 with magnetic shielding function, and by having the two respectively house the main unit of the ultrasonic molecular beam injection system 100, can effectively reduce the risk of gas leakage, thereby ensuring the safety of the ultrasonic molecular beam injection system 100, and making the ultrasonic molecular beam injection system 100 of the present invention applicable to the safe injection of tritium fuel particles in a tokamak.

[0049] In the ultrasonic molecular beam injection system 100 of this embodiment, all valves can be configured as all-metal valves, with a leakage rate of less than [missing information]. All components of the ultrasonic molecular beam injection system 100 can be sealed with metal to achieve a good sealing effect. This design helps to further ensure the safety of the ultrasonic molecular beam injection system 100.

[0050] The present invention also provides a method of using an ultrasonic molecular beam injection system 100, the specific structure of which refers to the above embodiments. Figure 4 As shown, the method of using the ultrasonic molecular beam injection system 100 includes the following steps:

[0051] S10. Vacuum the inside of the ultrasonic molecular beam injection system 100.

[0052] S20, the pressurization unit 20 pressurizes the gas at the gas source 10 and delivers it to the storage unit 30 so that the gas pressure stored in the storage unit 30 reaches the preset pressure value;

[0053] S30, the injection line 41 delivers gas from the storage unit 30 to the nozzle 42 to form an ultrasonic molecular beam through the nozzle 42.

[0054] In this embodiment, before evacuating the interior of the ultrasonic molecular beam injection system 100, the valves connecting the ultrasonic molecular beam injection system 100 to the outside can be closed, and the remaining internal valves of the ultrasonic molecular beam injection system 100 can be opened to connect the pipelines of each unit of the ultrasonic molecular beam injection system 100. Then, the vacuum mechanism 241 can be operated to evacuate the ultrasonic molecular beam injection system 100. Specifically, the mechanical pump 241b of the vacuum mechanism 241 can be operated first, and the vacuum level of the pipeline can be detected by a full-scale vacuum gauge. When the reading obtained by the full-scale vacuum gauge drops below 10 Pa, the molecular pump 241a of the vacuum mechanism 241 is operated until the reading obtained by the full-scale vacuum gauge further drops to... Next, the ultrasonic molecular beam injection system 100 will be evacuated.

[0055] Further, first close all valves of the ultrasonic molecular beam injection system 100, then connect the gas source 10 to the pressurization unit 20, and connect the pressurization unit 20 to the gas storage mechanism 311 of the storage unit 30. At this time, the first on / off valve 212 and the second on / off valve 213 on the gas delivery pipeline 21 are both kept open, and the pressurization pump 211 can pressurize the gas at the gas source 10 and pump it to the storage unit 30. During this process, the pressure detection pipeline can be connected to the gas delivery pipeline 21 to detect the pressure of the gas delivery pipeline 21 through a pressure gauge. For example, the preset pressure value of the gas stored in the gas storage mechanism 311 can be set to... .

[0056] Furthermore, by controlling the high-frequency solenoid valve 332 on the second branch pipe 33, the high-pressure gas stored in the gas storage mechanism 311 can be transmitted to the injection pipe 41 and further reach the nozzle 42 in the tokamak vacuum chamber of the fusion device, so as to form an ultrasonic molecular beam through the nozzle 42, thereby realizing the function of injecting combustion particles by the ultrasonic molecular beam injection system 100.

[0057] like Figure 4 As shown, the method of using the ultrasonic molecular beam injection system 100 in this embodiment of the invention further includes the following steps:

[0058] S40, the storage unit 30 and the injection unit 40 are isolated, and the gas in the storage unit 30 is drawn back through the pressurization unit 20.

[0059] In this embodiment, after the ultrasonic molecular beam injection system 100 has completed the injection of combustion particles, the valves on the second branch pipe 33 and the injection pipe 41 can be closed first, and the third on / off valve 221 and the fourth on / off valve 231 on the first vent pipe 22 and the second vent pipe 23 can be opened. At the same time, the first on / off valve 212 and the second on / off valve 213 on the gas supply pipe 21 can be closed. At this time, the gas inside the ultrasonic molecular beam injection system 100 can be quickly drawn back by the booster pump 211 at the booster unit 20 to ensure the safety of the ultrasonic molecular beam injection system 100.

[0060] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An ultrasonic molecular beam injection system for a fusion device, characterized in that, The ultrasonic molecular beam injection system includes a gas source, a pressurization unit, a storage unit, and an injection unit. The pressurization unit includes a gas delivery pipeline, with both ends of the gas delivery pipeline connected to the gas source and the storage unit, respectively. A pressurization pump is provided on the gas delivery pipeline. The pressurization pump is used to pressurize the gas in a direction away from the gas source. The storage unit can receive and store the pressurized gas so that the gas reaches a preset pressure value. The injection unit includes an injection pipeline and a nozzle. One end of the injection pipeline is connected to the storage unit, and the other end is provided with the nozzle. The nozzle is used to extend into the tokamak vacuum chamber of the fusion device. The injection pipeline can deliver the gas in the storage unit to the nozzle so as to form an ultrasonic molecular beam through the nozzle. The gas supply pipeline has a first on / off valve connected in series at the end of the booster pump facing the storage unit, and the gas supply pipeline has a second on / off valve connected in series at the end of the booster pump facing the gas source. The booster unit also includes: A first venting pipeline, the inlet of which is connected to the gas supply pipeline and located between the first on / off valve and the storage unit, and the outlet of which is connected to the gas supply pipeline and located between the second on / off valve and the booster pump, and a third on / off valve is provided on the first venting pipeline; and The second venting pipeline has an inlet end connected to the gas supply pipeline and located between the booster pump and the first on / off valve. The outlet end of the second venting pipeline is connected to the gas supply pipeline and located between the second on / off valve and the gas source. A fourth on / off valve is provided on the second venting pipeline.

2. The ultrasonic molecular beam injection system for a fusion device according to claim 1, characterized in that, The pressurization unit also includes a vacuum line, one end of which is connected to the first venting line, and a vacuum mechanism is provided on the vacuum line.

3. The ultrasonic molecular beam injection system for a fusion device according to claim 2, characterized in that, The vacuum pumping mechanism includes a molecular pump and a mechanical pump, which are connected in series on the vacuum pumping pipeline, with the mechanical pump located at the end of the molecular pump away from the first venting pipeline.

4. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 3, characterized in that, The storage unit includes a main pipeline, a first branch pipeline and a second branch pipeline. One end of the main pipeline is connected to the gas transmission pipeline. A gas storage mechanism is provided on the main pipeline. The first branch pipeline and the second branch pipeline are connected in parallel between the main pipeline and the injection pipeline. The first branch pipeline is equipped with a fifth on / off valve, and the second branch pipeline is equipped with a high-frequency solenoid valve and two sixth on / off valves connected in series, with the two sixth on / off valves located at opposite ends of the high-frequency solenoid valve.

5. The ultrasonic molecular beam injection system for a fusion device according to claim 4, characterized in that, The second branch pipeline is provided in multiple ways, and the multiple second branch pipelines are connected in parallel with the first branch pipeline.

6. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 3, characterized in that, The injection pipeline includes at least three interconnected straight pipe sections, with the extension directions of two adjacent straight pipe sections arranged at an angle.

7. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 3, characterized in that, The ultrasonic molecular beam injection system further includes a first shielding component, which has a first shielding chamber for housing the pressurization unit. The first shielding component is also provided with a first detection and collection mechanism for detecting and collecting leaked gas in the first shielding chamber. And / or, the ultrasonic molecular beam injection system further includes a second shielding component, which has a second shielding chamber for housing the storage unit. The second shielding component is also provided with a second detection and collection mechanism for detecting and collecting leaked gas in the second shielding chamber.

8. A method of using an ultrasonic molecular beam injection system, employing the ultrasonic molecular beam injection system for fusion devices as described in any one of claims 1 to 7, characterized in that, Includes the following steps: The interior of the ultrasonic molecular beam injection system is evacuated; The pressurization unit pressurizes the gas at the gas source and delivers it to the storage unit so that the gas pressure stored in the storage unit reaches a preset pressure value. The injection line delivers gas from the storage unit to the nozzle to form an ultrasonic molecular beam through the nozzle.

9. The method of using the ultrasonic molecular beam injection system according to claim 8, characterized in that, Also includes: The storage unit and the injection unit are isolated, and the gas in the storage unit is drawn back through the pressurization unit.

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