Isotope receiving device and collecting method for inert gas ion collection

Abstract

The invention relates to an isotope receiving device for inert gas ion collection and a collection method. The isotope receiving device comprises a vacuum box and a receiving pocket which is arranged in the vacuum box and is used for receiving an inert gas ion beam; an entrance slit for an inert gas ion beam to pass through is formed in a front panel, directly facing the incident ion beam, of the receiving pocket, and a graphene window for the inert gas ion beam to penetrate through covers the entrance slit; a rear panel of the receiving pocket is connected with a vacuum displacement platform, a gas path pipeline communicated with an inner cavity of the receiving pocket is arranged in the vacuum displacement platform, and neutralized inert gas is output from the isotope receiving device along the gas path pipeline; and the receiving pocket is also connected with a driving assembly capable of moving back and forth along the incident direction of the ion beam. Compared with the prior art, the isotope receiving device provided by the invention can reduce gas escape after inert gas ions are neutralized, and can realize effective collection of the neutralized isotope inert gas.

Description

Technical Field

[0001] The invention belongs to the technical field of isotope collection, and in particular relates to an isotope receiving device and a collection method for collecting inert gas ions. Background Art

[0002] 85 Kr is a noble gas radioisotope that emits 0.67 MeV beta rays with a half-life of 10.7 years and can be used to measure global fissile material. 239 Pu and the approximate size of a nuclear explosion. 85 Gas radioactive sources prepared by Kr are widely used in thickness gauges, light sources, electron capture identifiers, nuclear lamps and other fields.

[0003] 85 Kr is produced during the reprocessing of nuclear fuel. Nuclear fission produces about 3 per 1,000 fission events. 85 Kr atoms, directly extracted from spent fuel shear tail gas 85 The abundance of Kr is between 1% and 5%. For most application scenarios, 85 The higher the Kr abundance, the better. It can be improved by electromagnetic separation device. 85 The abundance of Kr.

[0004] 85 The Kr isotope receiving device is 85 One of the core components of the Kr electromagnetic separation device, used to collect and temporarily store the separated and enriched 85 Kr ions. Aluminum foil is a common material for collecting gas isotopes in electromagnetic separation devices. After adsorption and enrichment, isotope products are obtained by desorption through heating and other methods.

[0005] After electromagnetic separation 85 The energy of Kr isotope ion beam is relatively large, and the ion bombardment and sputtering effects are more obvious. When a high-energy ion beam bombards the surface of a target or other material, it may cause physical sputtering or chemical sputtering, causing atoms or molecules of the target material to be removed from the surface and redeposited at other locations. The impact of the thermal effect caused by ion bombardment must also be considered. In addition, when high-energy ions interact with materials, they transfer energy to material atoms through nuclear energy loss and electronic energy loss, causing atoms to sputter out from the surface. The above-mentioned ion bombardment and sputtering effects will affect 85 The collection efficiency of Kr isotopes. CN 106422775A discloses a receiver for an isotope electromagnetic separator, which can realize the reception of stable isotopes. The setting of the receiving pocket can reduce the sputtering effect of the ion beam. However, the above receiving device is not suitable for 85 Inert gas ions such as Kr are collected, and the neutralized inert gas escapes from the entrance slit of the receiving pocket.

[0006] Therefore, it is urgent to develop an isotope receiving device suitable for collecting inert gas ions to achieve 85 Effective collection of noble gas isotopes such as Kr. Summary of the invention

[0007] The purpose of the present invention is to provide an isotope receiving device and a collecting method for collecting inert gas ions in order to overcome the defect that the existing isotope receiving device is not suitable for collecting inert gas ions.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] An isotope receiving device for collecting inert gas ions comprises a vacuum box and a receiving pocket arranged in the vacuum box for receiving an inert gas ion beam;

[0010] An incident slit for the inert gas ion beam to pass through is provided on the front panel of the receiving pocket facing the incident ion beam, and the incident slit is covered with a graphene window through which the inert gas ion beam can pass;

[0011] The rear panel of the receiving pocket is connected to a vacuum displacement platform, and a gas pipeline communicating with the inner cavity of the receiving pocket is arranged in the vacuum displacement platform, and the neutralized inert gas is output to the isotope receiving device along the gas pipeline;

[0012] The receiving pocket is also connected to a driving component which can drive the receiving pocket to move forward and backward along the incident direction of the ion beam.

[0013] Furthermore, a side of the vacuum box facing the incident ion beam is connected to a separation magnet vacuum pipeline via a gate valve.

[0014] Furthermore, the vacuum box is connected to a negative pressure component outside the vacuum box through a gate valve.

[0015] Furthermore, the negative pressure component uses a molecular pump to evacuate the vacuum box into a vacuum state during the isotope collection stage.

[0016] Furthermore, the frame of the receiving pocket is a sandwich structure, and a cooling medium flows through the sandwich structure.

[0017] Furthermore, the front panel and the graphene window of the receiving pocket are both tilted, and the inclination angles of the front panel and the graphene window to the horizontal plane are both 30-60°.

[0018] Furthermore, the length of the incident slit is 50-100 mm, and the width is 4-6 mm.

[0019] Furthermore, a baffle that can be penetrated by the inert gas ion beam is provided on the outer side of the front panel, and the baffle is adapted to the size of the front panel. The baffle can protect the front panel of the receiving pocket to prevent the inert gas element other isotope ion beam from sputtering the front panel of the receiving pocket.

[0020] Furthermore, the vacuum box is connected to the vacuum displacement platform via a gate valve, and the vacuum displacement platform is sealed and connected to the receiving pocket via a fastener.

[0021] Furthermore, the portion of the vacuum displacement platform extending out of the vacuum box is also sleeved with a vacuum sealing bellows to improve the sealing performance of the entire receiving device.

[0022] Furthermore, the driving assembly includes a connecting rod that is inserted into the vacuum displacement platform and connected to the receiving pocket, and an electric driving member connected to the connecting rod. The electric driving member is remotely controlled to achieve synchronous horizontal movement of the receiving pocket and the vacuum displacement platform.

[0023] Furthermore, the driving assembly can be a telescopic cylinder or a stepper motor. When the telescopic cylinder is used, the telescopic rod is connected to the receiving pocket, and the cylinder drives the telescopic rod to move horizontally. When the stepper motor is used, the receiving pocket is connected to the lead screw through the lead screw nut, and the stepper motor controls the lead screw to rotate and drive the receiving pocket to move horizontally.

[0024] Furthermore, the vacuum displacement platform is a columnar structure, and the gas pipeline is arranged along the axial direction of the vacuum displacement platform.

[0025] Furthermore, one end of the gas pipeline is communicated with the inner cavity of the receiving bag, and the other end is connected to the gas collection component.

[0026] The present invention also provides a collection method using the above isotope receiving device, comprising the following steps:

[0027] S1: The inert gas ion beam enters the vacuum box along the separation magnet vacuum pipe;

[0028] S2: The position of the receiving pocket is adjusted by the vacuum displacement platform so that the inert gas ion beam enters from the incident slit and is deposited in the receiving pocket;

[0029] S3: The neutralized inert gas is output to the isotope receiving device through the gas pipeline.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The isotope receiving device of the present invention is covered with a graphene window outside the incident slit, which can effectively avoid the influence of sputtering on the collection of inert gas isotopes and reduce the gas escape after the inert gas ions are neutralized; at the same time, a vacuum displacement platform and a gas pipeline are also provided to realize the collection of the neutralized isotope inert gas.

[0032] (2) In the present invention, the inert gas isotope ion beam is deflected and separated by the separation magnet and then received by the isotope receiving device. By synchronously adjusting the positions of the receiving pocket and the vacuum displacement platform horizontally, the deflected inert gas ion beam can be injected into the receiving pocket through the incident slit and collected.

[0033] (3) The isotope receiving device of the present invention is suitable for collecting ions in gaseous state at normal temperature and pressure, such as argon ions, krypton ions and other inert gas ions, and with the assistance of the graphene window, it can effectively reduce the gas escape after the inert gas ions are neutralized, thereby improving the collection efficiency of the inert gas elements.

[0034] (4) The graphene window of the present invention allows the energetic ion beam to pass through, preventing the residual gas from freely diffusing. The state of isotopes remains unchanged when they are collected or not collected, and there is no need for complex opening and closing regulation in different collection stages.

[0035] (5) The present invention can realize the continuous collection of isotope inert gas by the isotope receiving device through the vacuum displacement platform, the gas pipeline and the gas collection component, without the need to interrupt the extraction after the collection accumulates for a period of time.

[0036] (6) The interlayer structure of the present invention has a cooling medium inside, and can be cooled by water during the isotope collection and extraction stage. Compared with the ordinary applied cooling water pipe, it has a significant cooling effect and can effectively reduce the influence of the thermal effect generated by ion bombardment on isotope collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of the isotope receiving device of the present invention.

[0038] Figure 2 It is a schematic diagram of the three-dimensional structure of the isotope receiving device of the present invention.

[0039] Figure 3 It is a cross-sectional schematic diagram of the isotope receiving device of the present invention.

[0040] Figure 4 Schematic diagram of the structure of the incident slit of Example 4 of the present invention.

[0041] Figure 5 This is a test result diagram of the ion penetration rate of Example 4 of the present invention.

[0042] Description of the markings in the figure:

[0043] 1-vacuum box, 11-separation magnet vacuum pipeline, 2-receiving pocket, 21-front panel, 22-rear panel, 3-incident slit, 4-graphene window, 5-vacuum displacement platform, 51-gas pipeline, 52-vacuum sealing bellows, 6-driving part, 61-connecting rod, 62-electric driving part, 7-baffle, 8-gas collecting assembly. DETAILED DESCRIPTION

[0044] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0045] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] Embodiment 1:

[0048] This embodiment provides an isotope receiving device for collecting inert gas ions, including a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam.

[0049] like Figure 1-3As shown, an incident slit 3 for the inert gas ion beam to pass through is provided on the front panel 21 of the receiving pocket 2 facing the incident ion beam, and a graphene window 4 through which the inert gas ion beam can pass is covered on the outside of the incident slit 3. A vacuum displacement platform 5 is connected to the rear panel 22 of the receiving pocket 2, and a gas pipeline 51 connected to the inner cavity of the receiving pocket 2 is provided in the vacuum displacement platform 5. The neutralized inert gas is output to the isotope receiving device along the gas pipeline 51. The receiving pocket 2 is also connected to a driving component 6 that can drive the receiving pocket 2 to move forward and backward along the incident direction of the ion beam.

[0050] The process of isotope collection using the isotope receiving device of this embodiment is as follows: the inert gas ion beam enters the vacuum box 1 along the separation magnet vacuum pipe, and then the position of the receiving pocket 2 and the vacuum displacement platform 5 is adjusted by the driving component 6, so that the inert gas ion beam is injected from the incident slit 3 and deposited in the receiving pocket 2. The neutralized inert gas in the receiving pocket 2 is output from the isotope receiving device through the gas pipeline 51.

[0051] Embodiment 2:

[0052] This embodiment provides an isotope receiving device for collecting inert gas ions, including a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam.

[0053] The difference from Example 1 is that the side of the vacuum box 1 of this embodiment facing the incident ion beam is connected to the separation magnet vacuum pipe 11 through a gate valve, and the inert gas ion beam is injected into the vacuum box 1 along the separation magnet vacuum pipe 11.

[0054] The vacuum box 1 of this embodiment is connected to the negative pressure component outside the vacuum box 1 through a gate valve. Specifically, the receiving pocket 2 is not in direct contact with the vacuum box 1, and the receiving pocket 2 is located in the rear box body. The negative pressure component uses a molecular pump to evacuate the vacuum box 1 into a vacuum state during the isotope collection stage.

[0055] Embodiment 3:

[0056] This embodiment provides an isotope receiving device for collecting inert gas ions, comprising a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam. An incident slit 3 for the inert gas ion beam to pass through is provided on a front panel 21 of the receiving pocket 2 facing the incident ion beam, and the incident slit 3 is covered with a graphene window 4 through which the inert gas ion beam can pass.

[0057] The difference from Example 1 is that the frame of the receiving pocket 2 of this embodiment is a sandwich structure, and a cooling medium is passed through the sandwich structure. Water cooling can be used during the isotope collection and extraction stage to reduce the influence of the thermal effect generated by ion bombardment on the isotope collection. Specifically, the water-cooled sandwich structure is a lathe that uses a number of Z-shaped water troughs connected end to end on a copper flat plate, and then welds a copper cover plate to seal. Different from the conventional application of cooling water pipes, the cooling effect of this embodiment is significantly improved.

[0058] Embodiment 4:

[0059] This embodiment provides an isotope receiving device for collecting inert gas ions, comprising a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam. An incident slit 3 for the inert gas ion beam to pass through is provided on a front panel 21 of the receiving pocket 2 facing the incident ion beam, and a graphene window 4 through which the inert gas ion beam can pass is covered on the outside of the incident slit 3 to prevent the neutralized inert gas from escaping.

[0060] like Figure 4 As shown, the front panel 21 and the graphene window 4 of the receiving pocket 2 of this embodiment are both tilted, and the tilt angles of the front panel 21 and the graphene window 4 to the horizontal plane are both 30-60°. The horizontal length of the incident slit 3 is 50-100 mm, and the width is 5 mm.

[0061] In this embodiment, before setting the graphene window 4, 85 Taking Kr ion beam as an example, it was found that 85 When the Kr ion beam energy is greater than 30 keV, the penetration rate of the incident graphene with a thickness of 10 nm (about 30 layers) is greater than 99.5% (e.g. Figure 5 Therefore, a layer of graphene window 4 is placed at the entrance slit 3 of the isotope receiving device of this embodiment, which can block the passage of neutral atoms and molecules while allowing 85 Kr ions enter, thereby obtaining a higher abundance in the corresponding collector pocket. 85 Kr.

[0062] Embodiment 5:

[0063] This embodiment provides an isotope receiving device for collecting inert gas ions, comprising a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam. An incident slit 3 for the inert gas ion beam to pass through is provided on a front panel 21 of the receiving pocket 2 facing the incident ion beam, and the incident slit 3 is covered with a graphene window 4 through which the inert gas ion beam can pass.

[0064] Considering that other isotope ions of inert gas such as Kr will bombard and sputter the front panel 21 of the receiving pocket 2, a baffle 7 through which the inert gas ion beam can penetrate is provided on the outside of the front panel 21. The baffle 7 is adapted to the size of the front panel 21 and is also inclined. The front panel 21 of this embodiment is made of high melting point metals such as molybdenum and tantalum, which is resistant to beam bombardment and increases the service life of the receiver. The baffle 7 of this embodiment is made of a 2mm thick metal molybdenum plate.

[0065] Embodiment 6:

[0066] This embodiment provides an isotope receiving device for collecting inert gas ions, including a vacuum box 1 and a receiving pocket 2 arranged in the vacuum box 1 for receiving an inert gas ion beam.

[0067] The rear panel 22 of the receiving pocket 2 of this embodiment is connected to the vacuum displacement platform 5. The vacuum box 1 of this embodiment is connected to the vacuum displacement platform 5 through a gate valve, and the vacuum displacement platform 5 is sealed and connected to the receiving pocket 2 through a fastener. The part of the vacuum displacement platform 5 extending out of the vacuum box 1 is also sleeved with a vacuum sealing bellows 52 to improve the vacuum sealing performance of the entire receiving device.

[0068] The vacuum displacement platform 5 is a columnar structure, and an air path pipe 51 connected to the inner cavity of the receiving pocket 2 is axially arranged in the vacuum displacement platform 5. One end of the air path pipe 51 is connected to the inner cavity of the receiving pocket 2, and the other end is connected to the gas collection device. The neutralized inert gas is output from the isotope receiving device along the air path pipe 51 and is received by the gas collection component 8. The gas collection component 8 includes a molecular pump capable of pumping negative pressure, and the molecular pump outputs the neutralized inert gas along the air path pipe 51 and inputs it into the gas collection container for storage. Through the vacuum displacement platform 5, the air path pipe 51 and the gas collection component 8, the isotope receiving device can continuously collect the isotope inert gas without interrupting the extraction after the collection accumulates for a period of time.

[0069] The receiving pocket 2 of this embodiment is also connected to a driving assembly 6 that can drive the receiving pocket 2 to move forward and backward along the ion beam incident direction. The driving assembly 6 includes a connecting rod 61 that is inserted into the vacuum displacement platform 5 and connected to the receiving pocket 2, and an electric driving component 62 that is connected to the connecting rod 61. The driving assembly 6 can use a conventional telescopic cylinder or a stepping motor. When the telescopic cylinder is selected, the telescopic rod is connected to the receiving pocket 2, and the cylinder body drives the telescopic rod to move horizontally. When the stepping motor is selected, the receiving pocket 2 is threadedly connected to the lead screw, and the stepping motor controls the rotation of the lead screw to drive the receiving pocket to move horizontally. In this embodiment, a remote control method that does not destroy the vacuum environment is adopted, that is, an electric method is adopted to realize remote control of the electric driving component 62, and then synchronously drives the receiving pocket 2 and the vacuum displacement platform 5 to move forward and backward to adjust the receiving pocket 2 to be in a suitable isotope collection position.

[0070] Embodiment 7:

[0071] This embodiment provides an isotope receiving device for collecting inert gas ions and a specific method of use. Specifically, the isotope receiving device of this embodiment is used to receive 85 The isotope receiving device specifically comprises a vacuum box 1, a vacuum chamber, a vacuum displacement platform 5, a gas path pipeline 51, a receiving pocket 2, a baffle 7, an incident slit 3, and a graphene window 4. The isotope receiving device works in a vacuum environment. The receiving pocket 2 is located in the vacuum box 1. A front panel 21 is provided on the frame of the receiving pocket 2. An incident slit 3 is provided on the front panel 21. The incident slit 3 can pass the incident 85 Kr ion beam, receiving pocket 2 can receive the Kr ion beam passing through the incident slit 3. 85 The receiving pocket 2 is also connected to a driving assembly 6 that can move the receiving pocket 2 forward and backward along the incident direction of the ion beam, which includes a connecting rod 61 that is inserted into the vacuum displacement platform 5 and connected to the receiving pocket 2, and a stepper motor connected to the connecting rod 61. The synchronous horizontal movement of the receiving pocket 2 and the vacuum displacement platform 5 is achieved by remotely controlling the stepper motor.

[0072] One side of the vacuum box 1 is connected to the separation magnet vacuum pipeline through a gate valve, and the other side is connected to the vacuum displacement platform 5 through a gate valve. When the gate valve is closed, the vacuum box 1 is in a sealed state. The bottom of the vacuum box 1 is connected to the molecular pump through a gate valve, and the molecular pump is used to maintain the vacuum state of the vacuum box 1. The material of the vacuum box 1 is 316 stainless steel, with a wall thickness of 5mm, a width of 400mm, a height of 250mm, and a length of 1000mm.

[0073] because 85 The Kr ion beam is weak and has a small beam cross section, so a smaller entrance slit 3 is beneficial to improving the isotope abundance. 85 After the Kr ion beam is incident from the incident slit 3, it is deposited inside the receiving pocket 2 through the process of ion implantation and ion sputtering. In this embodiment, the size of the incident slit 3 is 5 mm in width, 100 mm in length, and the inclination angle with the horizontal plane is 30°.

[0074] The receiving pocket 2 and the vacuum box 1 of this embodiment do not contact each other and are separated by a vacuum environment. In the non-collection stage, the receiving pocket 2 and the vacuum box 1 are connected by a hose to maintain the air pressure balance on both sides of the graphene window 4. The height of the receiving pocket 2 is about 120 mm, the front-to-back length (beam incident direction) is about 200 mm, and the width is about 200 mm.

[0075] The incident slit 3 of this embodiment is also covered with a graphene window 4, which can block the diffusion of neutral atomic molecules and make more neutralized atoms and molecules diffuse. 85 Kr stays in the receiving pocket 2 and can penetrate more 85 K+ In this embodiment, a baffle 7 is installed on the outer side of the front panel 21 . The baffle 7 is a 2 mm thick metal molybdenum plate. The baffle 7 is used to block the bombardment and sputtering of other isotope ions of Kr on the front panel 21 of the receiving pocket 2 .

[0076] The end of the vacuum displacement platform 5 of this embodiment is connected to the receiving pocket 2, and the receiving pocket 2 is controlled to move forward and backward in the beam incident direction. The vacuum displacement platform 5 integrates a vacuum introduction part, and cooling water and the like enter the vacuum system through the introduction part. The receiving pocket 2 of this embodiment is made of stainless steel or pure copper, and the receiving pocket 2 is a sandwich structure, and cooling water is passed through the sandwich, and water cooling is passed during the isotope collection and extraction stage.

[0077] In summary, 85 The Kr isotope ion beam is deflected and separated by the separation magnet and then received by the isotope receiving device. By adjusting the position of the vacuum displacement platform 5 and the receiving pocket 2 horizontally, the deflected Kr isotope ion beam is 85 The Kr ion beam enters the entrance slit 3 and is collected. 85 After the Kr ion beam is incident on the receiving pocket 2, it is neutralized on the metal wall of the receiving pocket 2 and becomes 85 Kr gas, the graphene window 4 on the incident slit 3 can block the neutralized 85 Kr gas escapes. Then a molecular pump is used to collect the 85 The Kr gas is pumped into a designated gas collection container through the gas pipeline 51 of the vacuum displacement platform 5 .

[0078] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An isotope receiving device for collecting inert gas ions, characterized in that: It comprises a vacuum box (1) and a receiving pocket (2) arranged in the vacuum box (1) and used for receiving an inert gas ion beam; An incident slit (3) for the inert gas ion beam to pass through is provided on a front panel (21) of the receiving pocket (2) facing the incident ion beam, and the incident slit (3) is covered with a graphene window (4) through which the inert gas ion beam can pass; The rear panel (22) of the receiving pocket (2) is connected to a vacuum displacement platform (5), and a gas pipeline (51) communicating with the inner cavity of the receiving pocket (2) is provided in the vacuum displacement platform (5), and the neutralized inert gas is output to the isotope receiving device along the gas pipeline (51); The receiving pocket (2) is also connected to a driving component (6) capable of driving the receiving pocket (2) to move forward and backward along the ion beam incident direction.

2. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The side of the vacuum box (1) facing the incident ion beam is connected to a separation magnet vacuum pipe (11); The vacuum box (1) is also connected to a negative pressure component outside the vacuum box (1) via a gate valve.

3. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The frame of the receiving bag (2) is a sandwich structure, and a cooling medium flows through the sandwich structure.

4. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The front panel (21) and the graphene window (4) of the receiving pocket (2) are both arranged at an angle, and the inclination angles of the front panel (21) and the graphene window (4) with respect to the horizontal plane are both 30-60°.

5. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The length of the incident slit (3) is 50-100 mm, and the width is 4-6 mm.

6. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: A baffle (7) through which an inert gas ion beam can penetrate is arranged on the outer side of the front panel (21), and the baffle (7) is adapted to the size of the front panel (21).

7. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The vacuum box (1) is connected to the vacuum displacement platform (5) via a gate valve, and the vacuum displacement platform (5) is sealed to the receiving bag (2) via a fastener.

8. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The driving assembly (6) comprises a connecting rod (61) which is inserted into the vacuum displacement platform (5) and connected to the receiving pocket (2), and an electric driving member (62) which is connected to the connecting rod (61).

9. The isotope receiving device for collecting inert gas ions according to claim 1, characterized in that: The vacuum displacement platform (5) is a columnar structure, and the gas pipeline (51) is arranged along the axial direction of the vacuum displacement platform (5); One end of the gas pipeline (51) is in communication with the inner cavity of the receiving bag (2), and the other end is connected to the gas collection assembly (8).

10. A collection method using the isotope receiving device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The inert gas ion beam enters the vacuum box (1) along the separation magnet vacuum pipe; S2: adjusting the position of the receiving pocket (2) through the vacuum displacement platform (5) so that the inert gas ion beam is injected from the incident slit (3) and deposited in the receiving pocket (2); S3: The neutralized inert gas is output to the isotope receiving device through the gas pipeline (51).

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