Ultrasound molecular beam injection system for fusion device and method of use thereof

Abstract

The invention relates to the technical field of nuclear fusion, and discloses an ultrasonic molecular beam injection system for a fusion device.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, and the two ends of the gas conveying pipeline communicate with the gas source and the storage unit correspondingly; a booster pump is arranged on the gas conveying pipeline and used for pressurizing gas in the direction away from the gas source, and the storage unit can receive and store the pressurized gas so that the gas can reach 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 of the injection pipeline is provided with the nozzle, the nozzle is used for stretching into a Tokamak vacuum chamber of the fusion device, and the injection pipeline can convey gas in the storage unit to the nozzle so as to form an ultrasonic molecular beam current through the nozzle. According to the invention, the injection function of the ultrasonic molecular beam in a large fusion device can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear fusion devices, and in particular to an ultrasonic molecular beam injection system for a fusion device and a method of using the system. Background Art

[0002] During the discharge process of a tokamak, fuel particles must be continuously injected into the tokamak's vacuum chamber to maintain and increase plasma density. Currently, conventional plasma fueling schemes typically install nozzles on the periphery of the tokamak, injecting high-speed particles into the plasma via an ultrasonic molecular beam generated by the nozzles. However, as the scale of fusion devices increases, the ultrasonic molecular beam injection distance of this scheme is insufficient, making it difficult for the nozzle-generated beam to directly inject high-speed particles into the plasma. Consequently, this scheme cannot meet the plasma fueling requirements of large-scale tokamaks. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an ultrasonic molecular beam injection system for a fusion device and a method of using the same, aiming to realize 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 comprising a gas source, a pressurizing unit, a storage unit, and an injection unit. The pressurizing unit comprises a gas pipeline, the two ends of which are respectively connected to the gas source and the storage unit. A booster pump is provided on the gas pipeline, the booster pump is used to pressurize the gas in a direction away from the gas source, and the storage unit is capable of receiving and storing 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 transport the gas in the storage unit to the nozzle to form a supersonic molecular beam through the nozzle.

[0005] In one embodiment, the gas delivery pipeline is provided with a first on-off valve in series at one end of the booster pump facing the storage unit, and the gas delivery pipeline is provided with a second on-off valve in series at one end of the booster pump facing the gas source, and the booster unit further comprises: a first air release pipeline, wherein an air inlet end of the first air release pipeline is connected to the air supply pipeline and is located between the first on-off valve and the storage unit, an air outlet end of the first air release pipeline is connected to the air supply pipeline and is located between the second on-off valve and the booster pump, and a third on-off valve is provided on the first air release pipeline; and A second gas exhaust pipeline, an intake end of the second gas exhaust pipeline is communicated with the gas conveying pipeline and is located between the booster pump and the first on-off valve, an outlet end of the second gas exhaust pipeline is communicated with the gas conveying pipeline and is located between the second on-off valve and the gas source, and a fourth on-off valve is arranged on the second gas exhaust pipeline.

[0006] In an embodiment, the booster unit further comprises a vacuum extraction pipeline, one end of the vacuum extraction pipeline is communicated with the first gas exhaust pipeline, and a vacuum extraction mechanism is arranged on the vacuum extraction pipeline.

[0007] In an embodiment, the vacuum extraction mechanism comprises a molecular pump and a mechanical pump, the molecular pump and the mechanical pump are arranged in series on the vacuum extraction pipeline, and the mechanical pump is located at an end of the molecular pump away from the first gas exhaust pipeline.

[0008] In an embodiment, the storage unit comprises a main pipeline, a first branch pipeline and a second branch pipeline, one end of the main pipeline is communicated with the gas conveying pipeline, a gas storage mechanism is arranged on the main pipeline, and the first branch pipeline and the second branch pipeline are arranged in parallel between the main pipeline and the injection pipeline. A fifth on-off valve is arranged on the first branch pipeline, a high-frequency electromagnetic valve and two sixth on-off valves are arranged in series on the second branch pipeline, and the two sixth on-off valves are respectively located at two ends of the high-frequency electromagnetic valve.

[0009] In an embodiment, a plurality of second branch pipelines are arranged in parallel with the first branch pipeline.

[0010] In an embodiment, the injection pipeline comprises at least three straight pipeline segments connected in series, and adjacent two straight pipeline segments are arranged at an angle with respect to the extension direction.

[0011] In an embodiment, the ultrasonic molecular beam injection system further comprises a first shielding assembly having a first shielding chamber accommodating the booster unit, and the first shielding assembly is further 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 comprises a second shielding assembly having a second shielding chamber accommodating the storage unit, and the second shielding assembly is further provided with a second detection and collection mechanism for detecting and collecting leaked gas in the second shielding chamber.

[0012] The application further provides a use method of the ultrasonic molecular beam injection system, which adopts any one of the ultrasonic molecular beam injection systems described above, and the use method of the ultrasonic molecular beam injection system comprises the following steps: Performing vacuum extraction on the inside of the ultrasonic molecular beam injection system; The boosting unit boosts the pressure of the gas at the gas source and delivers the gas to the storage unit, so that the pressure of the gas stored in the storage unit reaches a preset pressure value; The injection pipeline is used to transport the gas from the storage unit to the nozzle, so as to form a supersonic molecular beam through the nozzle.

[0013] In one embodiment, the method for using the ultrasonic molecular beam injection system further includes: isolating the storage unit and the injection unit, and withdrawing the gas in the storage unit through the boosting unit.

[0014] The embodiments of the present invention provide an ultrasonic molecular beam injection system and a method for using the same. Compared with the prior art, the system has the following advantages: An ultrasonic molecular beam injection system according to an embodiment of the present invention includes a gas source, a pressurizing unit, a storage unit, and an injection unit. The pressurizing unit can transport gas from the gas source to the storage unit via a gas pipeline. During this process, a booster pump on the gas pipeline can pressurize the gas in a direction away from the gas source, thereby enabling the storage unit to receive and store the pressurized gas. Furthermore, the high-pressure gas from the storage unit can be transported to the nozzle via the injection pipeline of the injection unit. The present invention pressurizes the gas to be injected through a boosting unit, and receives and stores the pressurized gas through a storage unit. After the pressure of the high-pressure gas stored in the storage unit reaches a preset pressure value, it can be transmitted to the nozzle through an injection pipeline, thereby ensuring that the gas has sufficient pressure when transmitted to the nozzle, ensuring that the nozzle can form an ultrasonic molecular beam, and can further achieve the effect of increasing the injection distance of the ultrasonic molecular beam; and compared with the traditional method of arranging the nozzle outside the fusion device, the technical solution of the present invention can make the nozzle as close to the plasma as possible by locating the nozzle in the tokamak vacuum chamber of the fusion device, thereby ensuring that the ultrasonic molecular beam generated by it can be directly injected into the plasma, thereby realizing the injection function of the ultrasonic molecular beam in a large fusion device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an ultrasonic molecular beam injection system according to an embodiment of the present invention; Figure 2 This invention Figure 1 Schematic diagram of the local structure of the ultrasonic molecular beam injection system; Figure 3 This invention Figure 1 Another partial structural diagram of the ultrasonic molecular beam injection system; Figure 4 It is a flow chart of a method for using the ultrasonic molecular beam injection system according to an embodiment of the present invention.

[0016] In the figure, 100, ultrasonic molecular beam injection system; 10, gas source; 20, boosting unit; 21, gas transmission pipeline; 211, boosting pump; 212, first on-off valve; 213, second on-off valve; 22, first vent pipeline; 221, third on-off valve; 23, second vent pipeline; 231, fourth on-off valve; 24, vacuum pipeline; 241, vacuum mechanism; 241a, molecular pump; 241b, mechanical pump; 30, storage unit; 31, main pipeline; 311, gas storage mechanism; 32, first branch pipeline; 321, fifth on-off valve; 33, second branch pipeline; 331, sixth on-off valve; 332, high-frequency solenoid valve; 40, injection unit; 41, injection pipeline; 411, straight pipe section; 42, nozzle; 50, first shielding assembly; 60, first detection and collection mechanism; 70, second shielding assembly; 80, second detection and collection mechanism. DETAILED DESCRIPTION

[0017] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0018] It should be understood that the present invention uses terms such as "front" and "back" to describe various types of information, but such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, "front" information could also be referred to as "back" information, and "back" information could also be referred to as "front" information without departing from the scope of the present invention.

[0019] like Figures 1 to 3 As shown, an embodiment of the present invention is an ultrasonic molecular beam injection system 100 for a fusion device, the fusion device has a tokamak vacuum chamber, the ultrasonic molecular beam injection system 100 includes a gas source 10, a boosting unit 20, a storage unit 30 and an injection unit 40, the boosting unit 20 includes a gas pipeline 21, the two ends of the gas pipeline 21 are respectively connected to the gas source 10 and the storage unit 30, a booster pump 211 is provided on the gas pipeline 21, the booster 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 transport the gas in the storage unit 30 to the nozzle 42 to form an ultrasonic molecular beam flow through the nozzle 42.

[0020] The gas provided by the gas source 10 can be, but is not limited to, tritium gas, and the nozzle 42 of the injection unit 40 can be specifically configured as a Laval nozzle, which has a connected contraction, a throat, and an expansion portion. The cross-sectional area of ​​the contraction gradually decreases in the direction toward the throat, so that the transmission speed of the gas increases accordingly when passing through the contraction portion; the throat is the narrowest part of the Laval nozzle, and after the gas passes through the contraction portion and reaches the throat, its speed can approach and reach the speed of sound; the cross-sectional area of ​​the expansion portion gradually increases in the direction away from the throat, so that the gas gradually expands when passing through the expansion portion, thereby enabling the gas to convert internal energy into kinetic energy during the expansion process, thereby generating a far-sonic supersonic molecular beam. In a feasible embodiment, the contraction portion 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 portion is conical, and its cone angle can be set to 40°. The specific implementation method can be set according to actual needs and is not limited here.

[0021] In some embodiments, in order to obtain the gas pressure in the ultrasonic molecular beam injection system 100 in real time, a pressure gauge can be provided to detect the pressure of the gas pipeline 21. In a feasible embodiment, the boosting unit 20 further includes two pressure detection pipelines, one end of which is connected to the gas pipeline 21 and is located between the boosting pump 211 and the gas source 10, and the other end of the pressure detection pipeline is provided with a pressure gauge; the other end of the pressure detection pipeline is connected to the gas pipeline 21 and is located between the boosting pump 211 and the storage unit 30, and the other end of the pressure detection pipeline is provided with a pressure gauge. Furthermore, each pressure detection pipeline can also be provided with an on-off valve, which can be arranged in series at one end of the pressure gauge facing the gas pipeline 21, thereby controlling the on-off status of the pressure detection pipeline by the on-off valve. When the pressure detection pipelines are connected, the pressure of the gas pipeline 21 upstream and downstream of the boosting pump 211 can be detected by the pressure gauge.

[0022] It can be understood that the present invention pressurizes the gas to be injected through the boosting unit 20, and receives and stores the pressurized gas through the storage unit 30. The high-pressure gas stored in the storage unit 30 can be pressured to a preset pressure value and then transmitted to the nozzle 42 through the injection pipe 41, thereby ensuring that the gas has sufficient pressure when it is transmitted to the nozzle 42, to ensure that the nozzle 42 can form an ultrasonic molecular beam, and can further achieve the effect of increasing the injection distance of the ultrasonic molecular beam; and, compared with the traditional method of arranging the nozzle 42 on the periphery of the fusion device, the technical solution of the present invention can make the nozzle 42 as close to the plasma as possible by locating the nozzle 42 in the tokamak vacuum chamber of the fusion device, so as to ensure that the ultrasonic molecular beam generated by it can be directly injected into the plasma, thereby realizing the injection function of the ultrasonic molecular beam in a large fusion device.

[0023] like Figure 2 As shown, the gas delivery pipeline 21 of the embodiment of the present invention is provided with a first on-off valve 212 in series at one end of the booster pump 211 facing the storage unit 30, and the gas delivery pipeline 21 is provided with a second on-off valve 213 in series at one end of the booster pump 211 facing the gas source 10. The booster unit 20 further includes a first air release pipeline 22 and a second air release pipeline 23. The air inlet end of the first air release pipeline 22 is connected to the gas delivery pipeline 21 and is located between the first on-off valve 212 and the storage unit 30. The first air release pipeline The air outlet end of 22 is connected to the air supply pipeline 21 and is located between the second on-off valve 213 and the booster pump 211. A third on-off valve 221 is provided on the first air release pipeline 22; the air inlet end of the second air release pipeline 23 is connected to the air supply pipeline 21 and is located between the booster pump 211 and the first on-off valve 212. The air outlet end of the second air release pipeline 23 is connected to the air supply pipeline 21 and is located between the second on-off valve 213 and the air source 10. A fourth on-off valve 231 is provided on the second air release pipeline 23.

[0024] In a feasible embodiment, the first on-off valve 212 and the second on-off valve 213 can be opened, while the third on-off valve 221 and the fourth on-off valve 231 are disconnected. At this time, the gas provided by the gas source 10 can be transmitted to the storage unit 30 through the gas pipeline 21 in sequence through the first on-off valve 212, the booster pump 211 and the second on-off valve 213, and the high-pressure gas pressurized by the booster pump 211 can be received and stored by the storage unit 30. In another feasible embodiment, the first on-off valve 212 and the second on-off valve 213 can be disconnected, while the third on-off valve 221 and the fourth on-off valve 231 are opened. At this time, the first venting pipeline 22 and the second venting pipeline 23 are both connected to the gas pipeline 21, and the storage unit 30 can be evacuated by the booster pump 211. The gas at the storage unit 30 can be transmitted to the booster pump 211 through 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 pipeline 21, the first air release pipeline 22 and the second air release pipeline 23 through the conditions 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 boosting unit 20 can not only deliver the pressurized gas to the storage unit 30 through the boosting pump 211, but also use the boosting pump 211 to extract the gas from the storage unit 30.

[0025] like Figure 2As shown, the boosting unit 20 of the embodiment of the present invention further includes a vacuum line 24, one end of which is connected to the first vent line 22, and a vacuum mechanism 241 is provided on the vacuum line 24. With such an arrangement, the ultrasonic molecular beam injection system 100 can be vacuumed by the vacuum mechanism 241 before the boosting unit 20 is connected to the gas source 10 and supplies gas, thereby facilitating the reduction of interference from impurity gases within the ultrasonic molecular beam injection system 100 and improving the beam quality generated by the ultrasonic molecular beam injection system 100. For example, in a feasible embodiment, the internal pressure of the ultrasonic molecular beam injection system 100 can be firstly increased to 0.05 by the vacuum mechanism 241. Next, the boosting unit 20 is connected to the gas source 10 through the gas transmission pipeline 21 , so that the boosting unit 20 pressurizes and transmits the gas, and stores the high-pressure gas through the storage unit 30 .

[0026] Specifically, in this embodiment, the vacuum mechanism 241 of the embodiment of the present invention includes a molecular pump 241a and a mechanical pump 241b, which are arranged in series on the vacuum pipeline 24, and the mechanical pump 241b is located at the end of the molecular pump 241a away from the first venting pipeline 22. When the ultrasonic molecular beam injection system 100 is vacuumed, 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, and then the vacuum mechanism 241 is used to perform a vacuum process. Specifically, the mechanical pump 241b can be used to perform a preliminary vacuum operation to quickly reduce the pressure in the pipeline of the ultrasonic molecular beam injection system 100, and then the molecular pump 241a can be used to perform a secondary vacuum operation to further reduce the pressure in the pipeline, so that the vacuum mechanism 241 can meet the requirements of extracting a high vacuum degree.

[0027] Furthermore, a plurality of on-off valves may be provided on the vacuum pumping line 24. For example, in one feasible embodiment, three on-off valves may be provided in series on the vacuum pumping 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 on-off valve is located at the end of the mechanical pump 241b away from the molecular pump 241a.

[0028] In some embodiments, a full-scale vacuum gauge may be provided for real-time monitoring of the vacuum pressure in the ultrasonic molecular beam injection system 100. In one feasible embodiment, the booster unit 20 further includes two vacuum detection lines, one of which is connected to the first venting line 22 at one end and positioned between the molecular pump 241a and the first venting line 22, with a full-scale vacuum gauge provided at the other end. Another vacuum detection line is connected to the vacuum pumping line 24 at one end and positioned between the molecular pump 241a and the mechanical pump 241b at the other end, with a full-scale vacuum gauge provided at the other end.

[0029] like Figure 2 As shown, the storage unit 30 of the embodiment of the present invention includes a main line 31, a first branch line 32 and a second branch line 33. One end of the main line 31 is connected to the gas supply line 21. The main line 31 is provided with a gas storage mechanism 311. The first branch line 32 and the second branch line 33 are arranged in parallel between the main line 31 and the injection line 41; the first branch line 32 is provided with a fifth on-off valve 321, and the second branch line 33 is provided with a high-frequency solenoid valve 332 and two sixth on-off valves 331 in series, and the two sixth on-off valves 331 are respectively located at both ends of the high-frequency solenoid valve 332.

[0030] Specifically, in this embodiment, the gas storage mechanism 311 can be configured as a gas storage cylinder for storing high-pressure gas. Furthermore, the gas storage cylinder can be provided with at least one pressure gauge to monitor the pressure within the gas storage cylinder. For example, in one feasible embodiment, two pressure gauges can be provided in parallel on the gas storage cylinder, with one pressure gauge being used for real-time monitoring of the pressure within the gas storage cylinder and the other serving as a backup. This configuration helps ensure the stability of the storage unit 30.

[0031] In a feasible embodiment, when the gas storage mechanism 311 of the storage unit 30 needs to deliver high-pressure gas to the injection unit 40, the two sixth on-off valves 331 on the second branch pipeline 33 are opened, and the ultrasonic molecular beam can be injected by opening and closing the high-frequency electromagnetic valve 332, and the pulse time and injection frequency can be regulated by controlling the high-frequency electromagnetic valve 332. During this process, the fifth on-off valve 321 remains closed to isolate the first branch pipeline 32. Among them, the fifth on-off valve 321 can be used as a backup channel and is only used to be opened when the ultrasonic molecular beam injection system 100 needs to be vacuumed.

[0032] Furthermore, in the embodiment of the present invention, multiple second branch pipelines 33 are provided, and the multiple second branch pipelines 33 are arranged in parallel with the first branch pipeline 32. It is understandable that since the storage unit 30 can include multiple second branch pipelines 33 arranged in parallel, and each second branch pipeline 33 is provided in series with a high-frequency solenoid valve 332 and two sixth on-off valves 331, the storage unit 30 has multiple backup pipelines for high-pressure gas transmission. Such an arrangement is conducive to ensuring the stability of the storage unit 30. For example, in a specific embodiment, one first branch pipeline 32 and three second branch pipelines 33 are arranged in parallel between the gas storage mechanism 311 and the injection unit 40.

[0033] like Figure 3 As shown, the injection pipeline 41 of this embodiment of the present invention includes at least three interconnected straight pipe sections 411, with the extension directions of two adjacent straight pipe sections 411 arranged at an angle. Specifically, the angle between two adjacent straight pipe sections 411 can be set at 90°. It will be understood that by forming two bends in the injection pipeline 41, high-energy neutrons generated by fusion can be prevented from directly passing through the injection pipeline 41.

[0034] like Figure 1 As shown, the ultrasonic molecular beam injection system 100 of an embodiment of the present invention further includes a first shielding assembly 50, the first shielding assembly 50 has a first shielding chamber for accommodating the boosting unit 20, the first shielding assembly 50 is further 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 assembly 70, the second shielding assembly 70 has a second shielding chamber for accommodating the storage unit 30, the second shielding assembly 70 is further provided with a second detection and collection mechanism 80 for detecting and collecting leaked gas in the second shielding chamber.

[0035] Specifically in this embodiment, the first shielding assembly 50 may include a sealed negative pressure gas cabinet with a magnetic shielding effect. For example, a first shielding room is formed in the sealed negative pressure gas cabinet, and the pressure in the first shielding room can be set to By housing the booster unit 20 in the first shielding chamber, the gas leakage rate is reduced. In addition, the first shielding assembly 50 is further provided with a first detection and collection mechanism 60, which can sound an alarm and collect leaked gas when it detects that the gas content in the first shielding chamber is too high.

[0036] Likewise, the second shielding assembly 70 may include a sealed negative pressure gas cabinet having a second shielding chamber, wherein the pressure in the second shielding chamber may be set to By accommodating the storage unit 30 in the first shielding room, the gas leakage rate is reduced; the second shielding assembly 70 is also provided with a second detection and collection mechanism 80, which can sound an alarm and collect the leaked gas when it detects that the gas content in the second shielding room is too high.

[0037] It can be understood that the technical solution of the present invention can effectively reduce the risk of gas leakage by providing a first shielding component 50 and a second shielding component 70 with magnetic shielding function, and respectively accommodating the main units of the ultrasonic molecular beam injection system 100 through the two, thereby ensuring the safety of the ultrasonic molecular beam injection system 100, so that the ultrasonic molecular beam injection system 100 of the embodiment of the present invention can be used to achieve the safe injection of tritium fuel particles in the tokamak.

[0038] In the ultrasonic molecular beam injection system 100 of the embodiment of the present invention, each valve can be set as a full metal valve, and the leakage rate is less than Each component of the ultrasonic molecular beam injection system 100 can be sealed with metal to achieve a good sealing effect. This arrangement is conducive to further ensuring the safety of the ultrasonic molecular beam injection system 100.

[0039] The present invention also provides a method for using the ultrasonic molecular beam injection system 100. The specific structure of the ultrasonic molecular beam injection system 100 is as described above. Figure 4 As shown, the method for using the ultrasonic molecular beam injection system 100 includes the following steps: S10, evacuating the interior of the ultrasonic molecular beam injection system 100; S20, causing the boosting unit 20 to boost the pressure of the gas at the gas source 10 and deliver the gas to the storage unit 30, so that the pressure of the gas stored in the storage unit 30 reaches a preset pressure value; S30 , enabling the injection pipeline 41 to transport the gas from the storage unit 30 to the nozzle 42 , so as to form a supersonic molecular beam flow through the nozzle 42 .

[0040] In this embodiment, before the interior of the ultrasonic molecular beam injection system 100 is evacuated, the valve connecting the ultrasonic molecular beam injection system 100 to the outside world can be closed first, and the remaining internal valves of the ultrasonic molecular beam injection system 100 can be opened to connect the pipelines of the various units of the ultrasonic molecular beam injection system 100; then, the vacuum pumping mechanism 241 can be operated to evacuate the ultrasonic molecular beam injection system 100. Specifically, the mechanical pump 241b of the vacuum pumping mechanism 241 can be operated first, and the vacuum degree of the pipeline can be detected by the 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 pumping mechanism 241 is operated again until the reading obtained by the full-scale vacuum gauge further drops to Next, the ultrasonic molecular beam injection system 100 is evacuated.

[0041] Furthermore, all valves of the ultrasonic molecular beam injection system 100 are closed first, and then the gas source 10 is connected to the boosting unit 20, and the boosting unit 20 is connected 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 pipeline 21 are kept in the open state, and the boosting pump 211 can boost the gas at the gas source 10 and pump it to the storage unit 30. In this process, the pressure detection pipeline can be controlled to be connected to the gas pipeline 21 to detect the pressure of the gas 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 at .

[0042] Furthermore, by controlling the high-frequency solenoid valve 332 on the second branch pipeline 33, the high-pressure gas stored in the gas storage mechanism 311 can be transmitted to the injection pipeline 41, and further reaches 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 injection function of the ultrasonic molecular beam injection system 100 on combustion particles.

[0043] like Figure 4 As shown, the method for using the ultrasonic molecular beam injection system 100 according to the embodiment of the present invention further includes the following steps: S40 , the storage unit 30 and the injection unit 40 are isolated, and the gas in the storage unit 30 is withdrawn through the pressurizing unit 20 .

[0044] In this embodiment, after the ultrasonic molecular beam injection system 100 completes the injection of combustion particles, the valves on the second branch pipeline 33 and the injection pipeline 41 can be closed first, and the third on-off valve 221 and the fourth on-off valve 231 on the first vent pipeline 22 and the second vent pipeline 23 can be opened, and the first on-off valve 212 and the second on-off valve 213 on the gas supply pipeline 21 can be closed at the same time. At this time, the gas inside the ultrasonic molecular beam injection system 100 can be quickly pumped back by the booster pump 211 at the booster unit 20 to ensure the safety of the ultrasonic molecular beam injection system 100.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as 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 booster unit, a storage unit, and an injection unit. The booster unit includes a gas pipeline, the two ends of which are respectively connected to the gas source and the storage unit. A booster pump is provided on the gas pipeline, and the booster pump is used to boost the gas in a direction away from the gas source. The storage unit is capable of receiving and storing the boosted 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 transport the gas in the storage unit to the nozzle to form a supersonic molecular beam through the nozzle.

2. The ultrasonic molecular beam injection system for a fusion device according to claim 1, characterized in that: The gas delivery pipeline is provided with a first on-off valve in series at one end of the booster pump facing the storage unit, and a second on-off valve is provided in series at one end of the booster pump facing the gas source. The booster unit further comprises: a first air release pipeline, wherein an air inlet end of the first air release pipeline is connected to the air supply pipeline and is located between the first on-off valve and the storage unit, an air outlet end of the first air release pipeline is connected to the air supply pipeline and is located between the second on-off valve and the booster pump, and a third on-off valve is provided on the first air release pipeline; and A second air bleed pipeline, the air inlet end of the second air bleed pipeline is connected to the air supply pipeline and is located between the booster pump and the first on-off valve, the air outlet end of the second air bleed pipeline is connected to the air supply pipeline and is located between the second on-off valve and the air source, and a fourth on-off valve is provided on the second air bleed pipeline.

3. The ultrasonic molecular beam injection system for a fusion device according to claim 2, characterized in that: The boosting unit further includes a vacuum pumping pipeline, one end of which is connected to the first air release pipeline, and a vacuum pumping mechanism is provided on the vacuum pumping pipeline.

4. The ultrasonic molecular beam injection system for a fusion device according to claim 3, characterized in that: The vacuum pumping mechanism includes a molecular pump and a mechanical pump, which are arranged in series on the vacuum pumping pipeline, and the mechanical pump is located at an end of the molecular pump away from the first degassing pipeline.

5. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 4, 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, and the first branch pipeline and the second branch pipeline are arranged in parallel between the main pipeline and the injection pipeline; A fifth on-off valve is provided on the first branch pipeline, and a high-frequency solenoid valve and two sixth on-off valves are connected in series on the second branch pipeline, and the two sixth on-off valves are respectively located at both ends of the high-frequency solenoid valve.

6. The ultrasonic molecular beam injection system for a fusion device according to claim 5, characterized in that: There are multiple second branch pipelines, and the multiple second branch pipelines are arranged in parallel with the first branch pipeline.

7. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 4, characterized in that: The injection pipeline includes at least three interconnected straight pipe sections, and the extension directions of two adjacent straight pipe sections are arranged at an angle.

8. The ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 4, characterized in that: The ultrasonic molecular beam injection system also includes a first shielding component, which has a first shielding chamber for accommodating the boosting unit, and 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 also includes a second shielding component, which has a second shielding chamber for accommodating the storage unit, and 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.

9. A method for using an ultrasonic molecular beam injection system, comprising: using the ultrasonic molecular beam injection system for a fusion device according to any one of claims 1 to 8, characterized in that: The steps include: evacuating the interior of the ultrasonic molecular beam injection system; The boosting unit boosts the pressure of the gas at the gas source and delivers the gas to the storage unit, so that the pressure of the gas stored in the storage unit reaches a preset pressure value; The injection pipeline is used to transport the gas from the storage unit to the nozzle, so as to form a supersonic molecular beam through the nozzle.

10. The method for using the ultrasonic molecular beam injection system according to claim 9, characterized in that: Also includes: The storage unit and the injection unit are isolated, and the gas in the storage unit is withdrawn through the pressurizing unit.

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