An integrated gas feeding and trapping system suitable for accelerators

Abstract

The present invention relates to a gas feeding and capturing system, and specifically to a comprehensive gas feeding and capturing system suitable for an accelerator, which solves the problems that the commonly used pumping facilities have a complex structure, large volume and weight, and when the heavy nuclear halogen elements mainly based on inert gas are used to feed gas to construct a gas target, the effective pumping speed of the molecular pump is low, and the diffused gas will affect the beam state and its transmission efficiency. The present invention sets a low-temperature gas capturing chamber upstream of the gas feeding pipe, and sets an adsorption component in the chamber, and the adsorption component is connected to a refrigerator. When the pulse gas feeding valve is opened, the inert gas enters the gas feeding pipe to form a gas target, and the charged particle beam generated upstream of the accelerator is transmitted into the low-temperature gas capturing chamber and passes through the central hole of the main adsorption tube to shoot at the gas target in the gas feeding pipe. When the downstream inert gas diffuses into the low-temperature gas capturing chamber, it will be condensed and adsorbed by the adsorption component, thereby preventing it from continuing to diffuse to the upstream space of the accelerator.

Description

Technical Field

[0001] The invention relates to a gas feeding and capturing system, and in particular to a comprehensive gas feeding and capturing system suitable for an accelerator. Background Art

[0002] It is a common measure in accelerators to utilize the interaction between gas molecules and the extranuclear electrons of charged particles to further strip off the extranuclear electrons of charged particles, thereby obtaining charged particles with a higher charge state. In order to construct a gas target that meets a specific gas pressure in a specified area on the accelerator beam line, it is generally necessary to actively feed gas to a specific area in the accelerator. However, the fed gas will inevitably diffuse to the upstream and downstream spaces of the target area, thereby affecting the beam state before and after stripping, transmission efficiency, etc., and conventional gas feeding devices on accelerators generally use flow meters to feed gas at a constant flow rate, and continue to feed gas in the interval where no beam passes, resulting in a large amount of additional gas in the system. Therefore, the gas feeding device must be equipped with corresponding pumping equipment to discharge the gas that overflows the target area out of the cavity.

[0003] Usually, a unit composed of a molecular pump and a dry pump is used as the main pumping facility to discharge the extra gas carrier. Therefore, the supporting facilities are complex in structure, large in size and weight, and have certain limitations in use in some narrow spaces. The current mainstream products of molecular pumps and dry pumps are still mainly imported equipment, and their procurement costs are also high. On the other hand, existing studies have shown that the use of heavy nuclear halogen elements based on inert gases can often achieve better stripping effects and better beam quality. If heavy nuclear halogen elements based on inert gases are used to feed gas to construct gas targets, the effective pumping speed of common molecular pumps is low, which will affect the beam state and transmission efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems that the commonly used pumping facilities have a complex structure, large volume and weight, and when heavy nuclear halogen elements mainly composed of inert gases are used to feed gas to construct gas targets, the effective pumping speed of the molecular pump is low, which will affect the beam state and transmission efficiency, and to provide a comprehensive feeding and capture system suitable for accelerators.

[0005] In order to achieve the above-mentioned invention object, the present invention provides the following technical solutions:

[0006] A comprehensive gas feeding and capturing system suitable for an accelerator, which is special in that it includes a refrigeration adsorption component, a low-temperature gas capturing chamber, a gas feeding pipe and a pulse gas feeding valve;

[0007] The low-temperature gas capture chamber is provided with two input ports and two output ports on its side wall, the two input ports are relatively arranged on the front side wall and the rear side wall of the low-temperature gas capture chamber, and the two output ports are relatively arranged on the left side wall and the right side wall of the low-temperature gas capture chamber;

[0008] The refrigeration adsorption assembly includes a refrigerator and an adsorption assembly, wherein there are two refrigerators, which are respectively sealed and connected to two side walls of a low-temperature gas capture chamber provided with an input port; the adsorption assembly includes a main adsorption tube arranged in the low-temperature gas capture chamber, wherein a central hole for passing a charged particle beam is axially opened inside the main adsorption tube, wherein the axis of the central hole coincides with a line connecting the centers of the two output ports, and the cold heads of the two refrigerators are connected to the main adsorption tube through the input port;

[0009] One output port of the low-temperature gas capture chamber is used to connect to the accelerator, and the other output port is connected to the gas feeding pipe, and the gas feeding pipe is connected to a plurality of vacuum gauges for measuring gas distribution. One outlet end of the pulse gas feeding valve is connected to the gas feeding pipe, and one inlet end is used to connect to the inert gas pipeline.

[0010] Furthermore, the adsorption assembly also includes an external adsorption ring circumferentially arranged on the outer wall of the main adsorption tube.

[0011] Furthermore, the adsorption assembly also includes an end adsorption ring coaxially arranged at the end of the main adsorption tube away from the air feeding tube, the center hole of the end adsorption ring is used to pass the charged particle beam, the center hole of the end adsorption ring is arranged corresponding to the center hole of the main adsorption tube, and the aperture of the center hole of the end adsorption ring is smaller than the aperture of the center hole of the main adsorption tube.

[0012] Furthermore, the main adsorption tube is a split structure, including a first main adsorption tube split and a second main adsorption tube split, both of which are connected to two cold heads through their outer side walls respectively, and the first main adsorption tube split and the second main adsorption tube split are spliced ​​along the axial splicing surface to form the main adsorption tube;

[0013] The end adsorption ring is a split structure, including a first end adsorption ring split and a second end adsorption ring split, the first end adsorption ring split and the second end adsorption ring split are respectively connected to the ends of the first main adsorption tube split and the second main adsorption tube split away from one end of the air feed tube, and the first end adsorption ring split and the second end adsorption ring split are spliced ​​along the axial splicing surface to form the end adsorption ring;

[0014] The external adsorption ring is a split structure, including a first external adsorption ring split and a second external adsorption ring split arranged on the outer wall of the first main adsorption tube split, a third external adsorption ring split and a fourth external adsorption ring split arranged on the second main adsorption tube split, one end of the first external adsorption ring split and the second external adsorption ring split are both connected to the cold head connected to the first main adsorption tube split, one end of the third external adsorption ring split and the fourth external adsorption ring split are both connected to the cold head connected to the second main adsorption tube split, the first external adsorption ring split, the second external adsorption ring split, the third external adsorption ring split and the fourth external adsorption ring split are spliced ​​along the axial splicing surface to form an external adsorption ring, and the other end of the first external adsorption ring split is abutted against the other end of the third external adsorption ring split, and the other end of the second external adsorption ring split is abutted against the other end of the fourth external adsorption ring split.

[0015] Furthermore, outer walls of the first main adsorption tube split, the second main adsorption tube split, the first end adsorption ring split, the second end adsorption ring split, the first external adsorption ring split, the second external adsorption ring split, the third external adsorption ring split and the fourth external adsorption ring split are all plated with indium.

[0016] Furthermore, the pulse air feeding valve is arranged at a middle position of the air feeding pipe.

[0017] Furthermore, connecting flanges are provided at the input port and the output port of the low-temperature gas capture chamber, the two refrigerators are connected to the two input ports respectively through the connecting flanges, and the accelerator and the gas feeding pipe are connected to the two output ports respectively through the connecting flanges.

[0018] Furthermore, the plurality of vacuum gauges are evenly distributed on the air feeding pipe along the axial direction.

[0019] Furthermore, a plurality of measuring holes are provided on the top of the low-temperature gas capture chamber, and a vacuum gauge is provided in each measuring hole.

[0020] Furthermore, the refrigerator is a Stirling type or a pulse tube type, and the inner diameter of the air feed pipe is 8 to 40 mm and the length is 500 to 1000 mm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention provides an integrated gas feeding and capturing system suitable for an accelerator, in which an adsorption component is arranged in a low-temperature gas capturing chamber, and the adsorption component is connected to a refrigerator through a cold head, so that when the refrigerator is working, the cold energy will be transferred to the adsorption component. When the pulse gas feeding valve is opened, the inert gas enters the gas feeding pipe from the pulse valve and diffuses to form a gas target. The accelerator connected to one of the output ports of the low-temperature gas capturing chamber transmits the charged particle beam into the low-temperature gas capturing chamber and shoots it to the gas target composed of inert gas in the gas feeding pipe through the central hole of the main adsorption tube in the adsorption component. When the inert gas diffuses into the low-temperature gas capturing chamber, because the temperature of the main adsorption tube is very low, the inert gas will be adsorbed by the adsorption component, thereby preventing the inert gas from continuing to diffuse to the upstream space of the accelerator. Because there is no need to use a unit consisting of a molecular pump and a dry pump to discharge the extra gas carrier, but a refrigerator is used in combination with an adsorption component to realize the condensation adsorption of the inert gas, the entire device is small in size and weight, and has a simple structure.

[0023] (2) The present invention provides an integrated gas feeding and capturing system suitable for an accelerator, wherein an external adsorption ring is circumferentially arranged on the outer wall of a main adsorption tube, and an end adsorption ring is coaxially arranged at the end of the main adsorption tube away from one end of the gas feeding tube. The center hole of the end adsorption ring is used to pass the beam, and the center hole of the end adsorption ring is arranged corresponding to the center hole of the main adsorption tube, and the aperture of the center hole of the end adsorption ring is smaller than the aperture of the center hole of the main adsorption tube. After the inert gas enters the low-temperature gas capturing chamber, the gas entering the main adsorption tube will be condensed and adsorbed by the inner wall of the main adsorption tube, and the inert gas outside the main adsorption tube will be condensed and adsorbed by the external adsorption ring and the outer wall of the main adsorption tube. The end adsorption ring serves as a second barrier, which can ensure to the greatest extent that the inert gas will not diffuse into the upstream space of the accelerator.

[0024] (3) The refrigerator provided by the present invention is a Stirling type or pulse tube type refrigerator suitable for an integrated gas feeding and capture system of an accelerator. Compared with conventional molecular pumps, GM refrigerator units, etc., its size and weight are greatly reduced, and it is suitable for use in a small space. In addition, there are mature domestic products for Stirling type or pulse tube type refrigerators, which have low procurement costs and can meet the domestic independent control needs in special application situations.

[0025] (4) The present invention provides a gas feeding and capturing system suitable for an accelerator, wherein the outer walls of the first main adsorption tube split, the second main adsorption tube split, the first end adsorption ring split, the second end adsorption ring split, the first external adsorption ring split, the second external adsorption ring split, the third external adsorption ring split and the fourth external adsorption ring split are all plated with indium. The indium plating can reflect external heat radiation to ensure that the temperature of the entire adsorption assembly is kept at a relatively low state.

[0026] (5) The gas feed pipe of the integrated gas feed and capture system for the accelerator provided by the present invention adopts a pulse gas feed valve to control the gas feed. Compared with the traditional method of constant gas feed using a flow meter, the gas feed volume is greatly reduced, and the waste of inert gas is effectively reduced. The inner diameter of the gas feed pipe is 8-40 mm, the length is 500-1000 mm, and the pulse gas feed valve is used for gas feed control. When the gas pressure at the center of the gas target is 0.1-10 Pa, the gas pressure at both ends is still maintained at 10 -3 ~10 -1 The Pa range means that while meeting the stripping gas pressure requirement, the additional gas load that may be brought to the upstream of the accelerator is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional structure diagram of an embodiment of a comprehensive gas feeding and trapping system suitable for an accelerator according to the present invention Figure 1 ;

[0028] Figure 2 The three-dimensional structure of the embodiment of the present invention is shown in FIG. Figure 2 (The cryogenic gas collection chamber and gas feed pipe are not shown);

[0029] Figure 3 It is a schematic diagram of the splicing of the first external adsorption ring split, the second external adsorption ring split, the third external adsorption ring split and the fourth external adsorption ring split in an embodiment of the present invention.

[0030] The following are the descriptions of the reference numerals:

[0031] 1- low-temperature gas capture chamber, 2- gas feed pipe, 3- pulse gas feed valve, 4- refrigerator, 41- cold head; 5- vacuum gauge, 6- main adsorption tube, 61- first main adsorption tube split, 62- second main adsorption tube split; 7- external adsorption ring, 71- first external adsorption ring split, 72- second external adsorption ring split, 73- third external adsorption ring split, 74- fourth external adsorption ring split; 8- end adsorption ring, 81- first end adsorption ring split, 82- second end adsorption ring split; 9- connecting flange. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and exemplary embodiments.

[0033] Reference Figure 1-Figure 3 The present invention is a comprehensive gas feeding and capturing system suitable for an accelerator, comprising a low temperature gas capturing chamber 1, the structure of the low temperature gas capturing chamber 1 is as follows Figure 1As shown, two measuring holes are provided on the top of the low-temperature gas capture chamber 1, and a vacuum gauge 5 is provided in each measuring hole for detecting the gas distribution inside the low-temperature gas capture chamber 1. Two input ports are provided on the front side wall and the rear side wall, and two output ports are provided on the left side wall and the right side wall. In order to facilitate connection with other components, connecting flanges 9 are provided on the input ports and the output ports, and an accelerator is connected to one of the output ports through the connecting flange 9, and a gas feed pipe 2 is connected to the other output port through the connecting flange 9.

[0034] The gas feed pipe 2 is connected with a plurality of vacuum gauges 5 for measuring gas distribution. In the present embodiment, three vacuum gauges 5 are provided and are evenly distributed along the axial direction of the gas feed pipe 2. A pulse gas feed valve 3 is provided in the middle of the gas feed pipe 2. One outlet end of the pulse gas feed valve 3 is connected to the gas feed pipe 2, and one inlet end is connected to the inert gas pipeline. The inner diameter of the gas feed pipe 2 is 8 to 40 mm, and the length is 500 to 1000 mm. In the present embodiment, the inner diameter of the gas feed pipe 2 is 40 mm, and the length is 600 mm. The pulse gas feed valve 3 is used to control the gas feed, and the pulse instantaneous gas feed volume is usually <1 torr.Ls -1 Compared with the traditional method of constant gas feeding using a flow meter, the gas feeding amount is greatly reduced, effectively reducing the waste of rare inert gas, and the pulse gas feeding valve 3 is used for gas feeding control, which can achieve that when the gas pressure at the center of the gas target is 0.1-10Pa, the gas pressure at both ends is still maintained at 10 -3 ~10 -1 The Pa range means that while meeting the stripping gas pressure requirement, the additional gas load on the upstream of the accelerator is greatly reduced.

[0035] In order to perform condensation adsorption, a refrigeration adsorption component is also provided, which includes a refrigerator 4 and an adsorption component. There are two refrigerators 4, which are sealed and connected to the two side walls of the low-temperature gas capture chamber 1 with an input port through connecting flanges 9. The refrigerator 4 is a Stirling type or a pulse tube type. Compared with conventional molecular pumps, GM refrigerator units, etc., the volume and weight are greatly reduced, and it is suitable for use in a small space. Moreover, the Stirling type or pulse tube type refrigerators 4 are both domestically produced mature products and meet the needs of domestic independent control.

[0036] An adsorption assembly is arranged inside the low-temperature gas capture chamber 1, and the adsorption assembly includes a main adsorption tube 6 arranged inside the low-temperature gas capture chamber 1. A central hole for passing the beam is opened axially inside the main adsorption tube 6, and the axis of the central hole coincides with the line connecting the centers of the two output ports. In this way, after the accelerator transmits the charged particle beam into the low-temperature gas capture chamber 1, the charged particle beam will pass through the central hole of the main adsorption tube 6 and shoot toward the gas target composed of inert gas in the feed pipe 2, ensuring smooth movement of the beam. The main adsorption tube 6 adopts a split structure, including a first main adsorption tube split 61 and a second main adsorption tube split 62. The first main adsorption tube split 61 and the second main adsorption tube split 62 are spliced ​​along the axial splicing surface to form the main adsorption tube 6, and the cold heads 41 of the two refrigerators 4 are connected to the outer side walls of the first main adsorption tube split 61 and the second main adsorption tube split 62 through the input port.

[0037] The adsorption assembly also includes an external adsorption ring 7 circumferentially arranged on the outer wall of the main adsorption tube 6. The external adsorption ring 7 also adopts a split structure, including a first external adsorption ring split 71 and a second external adsorption ring split 72 arranged on the outer wall of the first main adsorption tube split 61, a third external adsorption ring split 73 and a fourth external adsorption ring split 74 arranged on the second main adsorption tube split 62, one end of the first external adsorption ring split 71 and the second external adsorption ring split 72 are both connected to the cold head 41 connected to the first main adsorption tube split 61, one end of the third external adsorption ring split 73 and the fourth external adsorption ring split 74 are both connected to the cold head 41 connected to the second main adsorption tube split 62, and the first external adsorption ring split 7 1. The second external adsorption ring split 72, the third external adsorption ring split 73 and the fourth external adsorption ring split 74 are spliced ​​along the axial splicing surface to form the external adsorption ring 7, and the other end of the first external adsorption ring split 71 is abutted against the other end of the third external adsorption ring split 73, and the other end of the second external adsorption ring split 72 is abutted against the other end of the fourth external adsorption ring split 74. The first external adsorption ring split 71, the second external adsorption ring split 72, the third external adsorption ring split 73 and the fourth external adsorption ring split 74 all have one end connected to the cold head 41, and can directly obtain cold energy from the cold head 41, so that there is no need to transfer the cold energy of the cold head 41 through the main adsorption tube 6, so that the overall temperature of the adsorption component drops faster.

[0038] The adsorption assembly also includes an end adsorption ring 8 coaxially arranged at the end of the main adsorption tube 6 away from the air feeding tube 2. The center hole of the end adsorption ring 8 is used to pass the charged particle beam. The center hole of the end adsorption ring 8 is arranged corresponding to the center hole of the main adsorption tube 6, and the aperture of the center hole of the end adsorption ring 8 is smaller than the aperture of the center hole of the main adsorption tube 6. The end adsorption ring 8 also adopts a split structure, including a first end adsorption ring split 81 and a second end adsorption ring split 82. The first end adsorption ring split 81 and the second end adsorption ring split 82 are respectively connected to the ends of the first main adsorption tube split 61 and the second main adsorption tube split 62 away from the air feeding tube 2, and the first end adsorption ring split 81 and the second end adsorption ring split 82 are spliced ​​along the axial splicing surface to form the end adsorption ring 8.

[0039] In order to improve the condensation adsorption effect of the adsorption assembly on inert gas, the outer walls of the first main adsorption tube split 61, the second main adsorption tube split 62, the first end adsorption ring split 81, the second end adsorption ring split 82, the first external adsorption ring split 71, the second external adsorption ring split 72, the third external adsorption ring split 73 and the fourth external adsorption ring split 74 are all plated with indium. The indium plating can reflect external heat radiation to ensure that the temperature of the entire adsorption assembly is at a lower state, so that the inert gas can be condensed and adsorbed faster.

[0040] When in use, start the refrigerator 4 in advance and after reaching the set low temperature, open the pulse gas feed valve 3, and the inert gas enters the gas feed pipe 2 to diffuse to form a gas target. The gas distribution is measured by the vacuum gauge 5 and the gas feed amount can be adjusted according to the distribution until the pressure distribution in the gas feed pipe 2 reaches the theoretical design value. The charged particle beam generated by the accelerator enters the low-temperature gas capture chamber 1 and is shot through the central hole of the main adsorption tube 6 to the gas target composed of inert gas in the gas feed pipe 2. The inert gas diffuses into the low-temperature gas capture chamber 1, and most of it will be condensed and adsorbed by the inner wall of the main adsorption tube 6. The inert gas outside the main adsorption tube 6 will be condensed and adsorbed by the external adsorption ring 7 and the outer wall of the main adsorption tube 6. The end adsorption ring 8 serves as the second barrier to ensure that the inert gas will not diffuse into the upstream space of the accelerator to the greatest extent.

[0041] The embodiments described above are merely descriptions of specific implementation methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An integrated gas feeding and trapping system suitable for an accelerator, characterized in that: It comprises a refrigeration adsorption component, a low-temperature gas capture chamber (1), a gas feed pipe (2) and a pulse gas feed valve (3); The low-temperature gas capture chamber (1) is provided with two input ports and two output ports on its side wall, the two input ports being arranged oppositely on the front side wall and the rear side wall of the low-temperature gas capture chamber (1), and the two output ports being arranged oppositely on the left side wall and the right side wall of the low-temperature gas capture chamber (1); The refrigeration adsorption component comprises a refrigerator (4) and an adsorption component, wherein there are two refrigerators (4) and they are respectively sealed and connected to two side walls of a low-temperature gas capture chamber (1) provided with an input port; the adsorption component comprises a main adsorption tube (6) arranged in the low-temperature gas capture chamber (1), wherein a central hole for passing a charged particle beam is axially opened inside the main adsorption tube (6), wherein the axis of the central hole coincides with a line connecting the centers of the two output ports, and the cold heads (41) of the two refrigerators (4) pass through the input port and are connected to the main adsorption tube (6); One output port of the low-temperature gas capture chamber (1) is used to connect to an accelerator, and the other output port is connected to the gas feed pipe (2), and the gas feed pipe (2) is connected to a plurality of vacuum gauges (5) for measuring gas distribution, and one outlet end of the pulse gas feed valve (3) is connected to the gas feed pipe (2), and one inlet end is used to connect to an inert gas pipeline; The adsorption assembly further comprises an external adsorption ring (7) arranged on the outer wall of the main adsorption tube (6) along the circumferential direction; The adsorption assembly further comprises an end adsorption ring (8) coaxially arranged at an end of the main adsorption tube (6) away from the gas feeding tube (2); the center hole of the end adsorption ring (8) is used to pass the charged particle beam; the center hole of the end adsorption ring (8) is arranged corresponding to the center hole of the main adsorption tube (6), and the aperture of the center hole of the end adsorption ring (8) is smaller than the aperture of the center hole of the main adsorption tube (6).

2. The integrated gas feeding and trapping system for accelerator according to claim 1, characterized in that: The main adsorption tube (6) is a split structure, comprising a first main adsorption tube split (61) and a second main adsorption tube split (62), both of which are connected to two cold heads (41) through their outer side walls respectively, and the first main adsorption tube split (61) and the second main adsorption tube split (62) are spliced ​​along the axial splicing surface to form the main adsorption tube (6); The end adsorption ring (8) is a split structure, comprising a first end adsorption ring split (81) and a second end adsorption ring split (82), the first end adsorption ring split (81) and the second end adsorption ring split (82) are respectively connected to the ends of the first main adsorption tube split (61) and the second main adsorption tube split (62) away from the end of the gas feed tube (2), and the first end adsorption ring split (81) and the second end adsorption ring split (82) are spliced ​​along the axial splicing surface to form the end adsorption ring (8); The external adsorption ring (7) is a split structure, comprising a first external adsorption ring split (71) and a second external adsorption ring split (72) arranged on the outer wall of the first main adsorption tube split (61), a third external adsorption ring split (73) and a fourth external adsorption ring split (74) arranged on the second main adsorption tube split (62), one end of the first external adsorption ring split (71) and the second external adsorption ring split (72) are both connected to the cold head (41) connected to the first main adsorption tube split (61), and the third external adsorption ring split (73) and the fourth external adsorption ring split (74) are connected to the cold head (41) connected to the first main adsorption tube split (61). One end of the attached ring split (74) is connected to the cold head (41) connected to the second main adsorption tube split (62); the first external adsorption ring split (71), the second external adsorption ring split (72), the third external adsorption ring split (73) and the fourth external adsorption ring split (74) are spliced ​​along the axial splicing surface to form an external adsorption ring (7); the other end of the first external adsorption ring split (71) is in contact with the other end of the third external adsorption ring split (73); the other end of the second external adsorption ring split (72) is in contact with the other end of the fourth external adsorption ring split (74).

3. The integrated gas feeding and trapping system for accelerator according to claim 2, characterized in that: The outer walls of the first main adsorption tube split (61), the second main adsorption tube split (62), the first end adsorption ring split (81), the second end adsorption ring split (82), the first external adsorption ring split (71), the second external adsorption ring split (72), the third external adsorption ring split (73) and the fourth external adsorption ring split (74) are all plated with indium.

4. The integrated gas feeding and trapping system for accelerator according to any one of claims 1 to 3, characterized in that: The pulse air feeding valve (3) is arranged at the middle position of the air feeding pipe (2).

5. The integrated gas feeding and trapping system for accelerator according to claim 4, characterized in that: A connecting flange (9) is provided at both the input port and the output port of the low-temperature gas capture chamber (1); the two refrigerators (4) are respectively connected to the two input ports via the connecting flanges (9); and the accelerator and the gas feed pipe (2) are respectively connected to the two output ports via the connecting flanges (9).

6. The integrated gas feeding and trapping system for accelerator according to claim 5, characterized in that: The plurality of vacuum gauge tubes (5) are evenly distributed on the air feeding pipe (2) along the axial direction.

7. The integrated gas feeding and trapping system for accelerator according to claim 6, characterized in that: A plurality of measuring holes are provided on the top of the low-temperature gas capture chamber (1), and a vacuum gauge (5) is arranged in each measuring hole.

8. The integrated gas feeding and trapping system for accelerator according to claim 1, characterized in that: The refrigerator (4) is of Stirling type or pulse tube type; the inner diameter of the air feed pipe (2) is 8 to 40 mm and the length is 500 to 1000 mm.

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