Compact beam tube and method of making same

Abstract

This invention relates to the field of accelerator technology, and in particular to a compact beam pipe and its manufacturing method. The beam pipe includes: a pipe wall structure with a first pipe wall, a transition piece, and a second pipe wall sequentially connected; a metal flange installed on the first pipe wall and located at a first end of the pipe wall structure; and a non-metallic flange installed on the second pipe wall and located at a second end of the pipe wall structure. The outer layer of the first pipe wall is a thin-walled tube, and the inner layer of the first pipe wall is a titanium alloy liner support. The thin-walled tube is made of metal, and the second pipe wall is made of non-metallic material. In this invention, by using a titanium alloy liner support and a thin-walled tube to construct the first pipe wall, and using a non-metallic material to construct the second pipe wall, the beam pipe can simultaneously possess the lightweight and high-strength characteristics of both the thin-walled structure and the second pipe wall, effectively suppressing eddy current generation, reducing dynamic vacuum effects, and thus reducing the manufacturing cost and operating power consumption of the magnets.

Description

Technical Field

[0001] This invention relates to the field of accelerator technology, and in particular to a compact beam channel and its manufacturing method. Background Technology

[0002] In heavy ion synchrotrons, the combination of focusing and scanning magnets is a key technological combination for heavy ion therapy. However, the extremely rapid rise rates of the magnetic fields in both the focusing and scanning magnets cause eddy current effects due to heating in conventional metal conduits. Employing thin-walled structures or a second tube wall is crucial for reducing eddy current losses and mitigating dynamic vacuum effects. Traditionally manufactured stainless steel thin-walled reinforced vacuum chambers (wall thickness ≤1mm) suffer from high production costs due to the dense weld seams, making precision control difficult and requiring numerous tooling molds. In contrast, titanium alloys possess a specific strength (strength / density) up to seven times that of stainless steel. Based on this core performance advantage, thin-walled vacuum chambers with titanium alloy inner liners can effectively reduce the air gap of the focusing magnet, thereby significantly lowering the manufacturing cost of the focusing magnet and the power supply operation and maintenance costs, demonstrating significant application value in compact ion accelerators.

[0003] As a core component of synchrotron beam diagnostics, the beam position probe is crucial for ensuring the stability of proton and heavy ion beams. Currently, proton and heavy ion accelerators commonly employ a combination of conventional thick-walled tubes and independent beam position probes to meet the basic requirements of the beam channel. However, in the beam channel scenario of compact accelerators, independent beam position probes have significant drawbacks: their mechanical structure is complex and bulky, with numerous internal support points and insufficient precision, which not only easily generates multiple resonant points but also increases beam coupling impedance. Furthermore, both the beam channel and the beam position probe have stringent requirements for longitudinal installation space, but compact accelerators, in order to achieve structural simplification, limit the longitudinal height of the beam channel, making direct integration of the beam channel and beam position probe difficult. Summary of the Invention

[0004] This invention aims to solve the technical problems existing in related technologies. To this end, this invention proposes a compact beam channel and its manufacturing method to solve the problems of high eddy current losses in vacuum channels for focusing magnets and scanning magnets manufactured by traditional technologies, and the need for conventional thick-walled metal channels in synchrotrons to be used in conjunction with independent beam position probes to provide beam channels and signal detection.

[0005] In a first aspect, the present invention provides a compact beam conduit, comprising:

[0006] The pipe wall structure consists of a first pipe wall, a transition piece, and a second pipe wall connected in sequence.

[0007] A metal flange is installed on the first pipe wall and located at the first end of the pipe wall structure;

[0008] A non-metallic flange is installed on the second pipe wall and located at the second end of the pipe wall structure;

[0009] The outer layer of the first pipe wall is a thin-walled pipe, the inner layer of the first pipe wall is a titanium alloy inner lining support, the material of the thin-walled pipe is metal, and the material of the second pipe wall is non-metallic.

[0010] According to the present invention, a compact beam conduit is provided, wherein the titanium alloy liner support comprises:

[0011] The ribs are designed as rings that extend circumferentially and close at both ends;

[0012] A connecting plate is installed on the inner circumference of the rib.

[0013] Several of the ribs are spaced apart along the length of the thin-walled tube, and several of the connecting plates extend along the length of the thin-walled tube.

[0014] According to a compact beam conduit provided by the present invention, the first tube wall further includes:

[0015] The signal detection electrode is located on the inner circumferential side of the first tube wall and is fixed to the connecting plate by bolts;

[0016] A feedthrough is installed on the connecting plate and extends through the thin-walled tube to the outer periphery of the first tube wall.

[0017] According to the present invention, in a compact beam conduit, the spacing between any two adjacent ribs is between 10 mm and 15 mm.

[0018] According to the present invention, a compact beam pipe is provided, wherein the thin-walled tube is made of titanium alloy and the thickness of the thin-walled tube is between 0.1 mm and 0.3 mm.

[0019] In a second aspect, the present invention also provides a method for manufacturing a compact beam pipe, for manufacturing any of the compact beam pipes described above, wherein the first tube wall includes a thin-walled tube, a titanium alloy inner liner support, a signal detection electrode plate, and a feedthrough.

[0020] The production method includes:

[0021] S1. Process and assemble the various components of the first tube wall: respectively fabricate the thin-walled tube, titanium alloy inner liner bracket, signal detection electrode plate and feedthrough, install the signal detection electrode plate to the inner circumference of the titanium alloy inner liner bracket, embed the titanium alloy inner liner bracket into the inner circumference of the thin-walled tube, insert the feedthrough into the signal detection electrode plate, and then weld the feedthrough to the thin-walled tube.

[0022] S2. Machining the second pipe wall and adapter;

[0023] S3. Use an adapter to weld the first pipe wall and the second pipe wall together.

[0024] According to a method for manufacturing a compact beam channel provided by the present invention, the method for manufacturing the thin-walled tube and the titanium alloy inner liner support includes:

[0025] Thin-walled tubes are manufactured using mold extrusion molding, and titanium alloy inner lining supports are manufactured using laser printing.

[0026] According to a method for manufacturing a compact beam channel provided by the present invention, the step of mounting the signal detection electrode to the inner circumference of the titanium alloy liner support includes:

[0027] The signal detection electrode plate is fixed inside the titanium alloy inner liner bracket. A mechanical measuring arm is used to measure and adjust the parallelism tolerance between the signal detection electrode plate and the titanium alloy inner liner bracket, and the parallelism tolerance is controlled within ±0.1 mm.

[0028] According to a method for manufacturing a compact beam channel provided by the present invention, the step of welding the feedthrough to the thin-walled tube includes:

[0029] In the process of welding feedthroughs and thin-walled tubes, micro-beam plasma welding is used, and the welding current is controlled at 4A, the voltage at 30V, and the welding speed at 3mm / s to achieve a reliable connection with minimal thermal deformation.

[0030] According to a method for manufacturing a compact beam conduit provided by the present invention, the step of welding the first tube wall and the second tube wall together using an adapter includes: during the welding process, using a mechanical measuring arm to measure the coaxiality and parallelism of the metal flange and the non-metal flange in real time, and performing vacuum leak detection after welding to ensure that the leak rate is less than 5×10⁻⁶. -7 Pa·L / s.

[0031] The above-described one or more technical solutions of this invention have at least one of the following technical effects:

[0032] 1. The beam channel in this invention uses a titanium alloy inner lining support and a thin-walled tube to make the first tube wall, and uses a non-metallic material to make the second tube wall. This enables the beam channel to have the lightweight and high-strength characteristics of both the thin-walled structure and the second tube wall, effectively suppressing eddy current generation and reducing dynamic vacuum effects, thereby reducing the manufacturing cost and operating power consumption of the magnet.

[0033] 2. By installing the signal detection electrode plate inside the titanium alloy inner liner bracket, the signal detection electrode plate and the beam pipe are embedded and integrated, enabling the beam pipe to meet the requirements of vacuum sealing, beam transmission and high-precision beam diagnosis within a limited longitudinal space, thereby improving the compactness, mechanical stability and signal consistency of the accelerator system.

[0034] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions as described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings, or will be learned through the practice of the present invention. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a compact beam channel provided in an embodiment of the present invention.

[0037] Figure 2 This is a schematic diagram of the structure of a thin-walled metal tube provided in an embodiment of the present invention.

[0038] Figure 3 This is a schematic diagram of the structure of the titanium alloy inner liner bracket provided in an embodiment of the present invention.

[0039] Figure 4 A flowchart illustrating the fabrication method of a compact beam channel provided in an embodiment of the present invention.

[0040] Figure label:

[0041] 100. First pipe wall; 101. Metal flange; 102. Thin-walled pipe; 103. Adapter; 104. Titanium alloy inner lining bracket; 105. Feedthrough; 106. Fastening nut; 107. Signal detection electrode plate; 108. Connecting plate; 109. Rib; 110. Feedthrough mounting hole; 111. Fastener mounting hole; 200. Second pipe wall; 201. Non-metallic flange. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] In an embodiment of the present invention, a compact beam channel is described.

[0044] like Figures 1 to 3As shown, the beam pipe includes a pipe wall structure, a metal flange 101, and a non-metal flange 201.

[0045] The pipe wall structure comprises a first pipe wall 100, a connector 103, and a second pipe wall 200 connected in sequence. The first pipe wall 100 is made of metal. The second pipe wall 200 is made of non-metallic material.

[0046] A metal flange 101 is installed on the first pipe wall 100. A non-metallic flange 201 is installed on the second pipe wall 200. Furthermore, the metal flange 101 is located at the first end of the pipe wall structure, and the non-metallic flange 201 is located at the second end of the pipe wall structure.

[0047] Specifically, the outer layer of the first tube wall 100 is a thin-walled tube 102. The inner layer of the first tube wall 100 is a titanium alloy inner liner support 104.

[0048] The thin-walled tube 102 is made of metal. The cross-section of the thin-walled tube 102 can be circular, octagonal, or star-shaped to ensure compatibility with the overall structure of the accelerator. Correspondingly, the cross-sectional shape of the titanium alloy inner liner support 104 is consistent with the cross-sectional shape of the thin-walled tube 102.

[0049] like Figure 1 As shown, the cross-sectional shape of the second tube wall 200 is set to a rectangle to meet the beam envelope requirements of the scanning magnet. At the same time, the height and width of the adapter 103 are consistent with the larger components in the thin-walled tube 102 and the second tube wall 200 to meet the vacuum sealing requirements between them.

[0050] It should be noted that the length of the titanium alloy inner liner bracket 104 should be less than the length of the thin-walled tube 102, so as to reserve sufficient space for the connection between the thin-walled tube 102 and the metal flange 101 and the adapter 103.

[0051] Preferably, the thin-walled tube 102 is made of titanium alloy. The thickness of the thin-walled tube 102 is between 0.1 mm and 0.3 mm.

[0052] The titanium alloy inner liner support 104 includes a rib 109 and a connecting plate 108. The rib 109 is configured as a ring extending circumferentially and closing at both ends. The connecting plate 108 is installed on the inner circumferential side of the rib 109.

[0053] A plurality of the ribs 109 are spaced apart along the length of the thin-walled tube 102. A plurality of the connecting plates 108 extend along the length of the thin-walled tube 102.

[0054] In this embodiment, the beam channel uses a titanium alloy inner liner support 104 and a thin-walled tube 102 to make the first tube wall 100, and uses a non-metallic material to make the second tube wall 200. This allows the beam channel to have the lightweight and high-strength characteristics of both the thin-walled structure and the second tube wall 200, effectively suppressing eddy current generation and reducing the dynamic vacuum effect, thereby reducing the manufacturing cost and operating power consumption of the magnet.

[0055] Based on the above embodiments, another embodiment of the present invention introduces a compact beam channel.

[0056] The first pipe wall 100 also includes a signal detection electrode 107 and a feedthrough 105.

[0057] like Figure 1 and Figure 2 As shown, the outer layer of the first pipe wall 100 is a thin-walled pipe 102, and the inner layer of the first pipe wall 100 is a titanium alloy inner liner support 104. The outer layer of the titanium alloy inner liner support 104 is a rib 109, and the inner layer of the titanium alloy inner liner support 104 is a connecting plate 108. The connecting plate 108 has a side facing the rib 109 and a side away from the rib 109. The signal detection electrode 107 is located on the inner circumference of the first pipe wall 100. Furthermore, a fastening nut 106 is provided on the side of the connecting plate 108 facing the rib 109. By passing a bolt through the signal detection electrode 107 and locking it with the fastening nut 106, the signal detection electrode 107 can be fixed to the connecting plate 108.

[0058] Feedthrough 105 is mounted on the connecting plate 108. Furthermore, feedthrough 105 extends outward from the outer periphery of the first tube wall 100 and penetrates the thin-walled tube 102.

[0059] Specifically, the signal detection electrode 107 is located at one end of the tube wall structure, near the metal flange 101. In the first tube wall 100, the thin-walled tube 102, the titanium alloy inner liner support 104, the feedthrough 105, and the signal detection electrode 107 are integrated to collaboratively achieve vacuum sealing, beam guidance, and position monitoring functions. By installing the signal detection electrode inside the titanium alloy inner liner support, the signal detection electrode and the beam pipe are embedded and integrated, enabling the beam pipe to meet the requirements of vacuum sealing, beam transmission, and high-precision beam diagnostics within a limited longitudinal space.

[0060] Furthermore, the thickness of the connecting plate 108 is 1 mm. The four connecting plates 108 are evenly distributed circumferentially on the ribs 109, thus being symmetrically positioned vertically and horizontally on the ribs 109. The connecting plates 108 are provided with feedthrough mounting holes 110 and fastener mounting holes 111. Thus, the four connecting plates 108 have two sets of orthogonally distributed holes. The center of each hole is aligned with the center of the distance between two adjacent ribs 109, ensuring both uniform force during installation and coaxiality between the feedthrough 105 and the electrode plate.

[0061] The main function of the fastener mounting hole 111 is to fix the signal detection electrode plate 107, ensure the accuracy of the signal detection electrode plate 107, and improve the accuracy of beam position detection.

[0062] Furthermore, the spacing between any two adjacent ribs 109 is between 10 mm and 15 mm. In this way, the feedthrough 105 can be installed between the two ribs 109 and smoothly connected to the signal detection electrode 107, avoiding component interference.

[0063] In this embodiment, by embedding the signal detection electrode 107 into the interior of the titanium alloy inner liner support 104, the beam position detection function and the vacuum pipe body are deeply integrated in terms of physics and function. This not only meets the compact design requirements with limited longitudinal space, but also reduces the signal difference between the signal detection electrodes 107, providing a reliable guarantee for the stable operation of the accelerator.

[0064] Furthermore, in another embodiment of the present invention, a method for manufacturing a compact beam channel is introduced, which is used to manufacture the compact beam channel described in any of the above embodiments.

[0065] The pipe wall structure comprises a first pipe wall 100, a connector 103, and a second pipe wall 200 connected in sequence. The first pipe wall 100 is made of metal. The second pipe wall 200 is made of non-metallic material.

[0066] The first tube wall 100 includes a thin-walled tube 102, a titanium alloy inner liner support 104, a signal detection electrode 107, and a feedthrough 105. The titanium alloy inner liner support 104 includes ribs 109 and connecting plates 108.

[0067] The method for manufacturing a compact beam channel includes: S1, processing and assembling the various components of the first tube wall 100: separately manufacturing a thin-walled tube 102, a titanium alloy inner liner support 104, a signal detection electrode 107, and a feedthrough 105; installing the signal detection electrode 107 onto the inner circumference of the titanium alloy inner liner support 104; embedding the titanium alloy inner liner support 104 into the inner circumference of the thin-walled tube 102; inserting the feedthrough 105 into the signal detection electrode 107; and then welding the feedthrough 105 to the thin-walled tube 102; S2, processing the second tube wall 200 and the adapter 103; S3, using the adapter 103 to weld the first tube wall 100 and the second tube wall 200 together.

[0068] Furthermore, the methods for manufacturing the thin-walled tube 102 and the titanium alloy inner liner support 104 include: manufacturing the thin-walled tube 102 by die extrusion molding and manufacturing the titanium alloy inner liner support 104 by laser printing.

[0069] Furthermore, the step of installing the signal detection electrode 107 onto the inner circumference of the titanium alloy inner liner bracket 104 includes: fixing the signal detection electrode 107 inside the titanium alloy inner liner bracket 104, using a mechanical measuring arm to measure and adjust the parallelism tolerance between the signal detection electrode 107 and the titanium alloy inner liner bracket 104, and controlling the parallelism tolerance to be within ±0.1 mm.

[0070] Furthermore, the welding of the feedthrough 105 to the thin-walled tube 102 includes: during the welding process of the feedthrough 105 and the thin-walled tube 102, micro-beam plasma welding is used, and the welding current is controlled at 4A, the voltage at 30V, and the welding speed at 3mm / s, so as to achieve a reliable connection with small thermal deformation.

[0071] Furthermore, the step of welding the first pipe wall 100 and the second pipe wall 200 together using the adapter 103 includes: during the welding process, using a mechanical measuring arm to measure the coaxiality and parallelism of the metal flange 101 and the non-metal flange 201 in real time, and performing vacuum leak detection after welding to ensure that the leakage rate is less than 5×10⁻⁶. -7 Pa·L / s.

[0072] like Figure 4 As shown, the manufacturing method of the compact beam pipe mainly includes: processing the thin-walled tube 102 and the second tube wall 200, laser printing the titanium alloy inner liner support 104, processing the signal detection electrode 107 and the feedthrough 105, fixing the signal detection electrode 107 to the inside of the titanium alloy inner liner support 104, pushing the titanium alloy inner liner support 104 into the inside of the thin-walled tube 102, inserting the feedthrough 105 into the signal detection electrode 107, welding the feedthrough 105 to the thin-walled tube 102, welding the adapter 103 to the thin-walled tube 102, and welding the second tube wall 200 to the first tube wall 100.

[0073] When manufacturing the thin-walled tube 102, a mold is used to extrude a seamless round titanium alloy tube with a thickness between 0.1 mm and 0.3 mm into the target shape.

[0074] The second tube wall 200 is manufactured using a fused filament 3D printing method for integrated printing. After the thin-walled tube 102 and the second tube wall 200 are processed, they are ultrasonically cleaned and vacuum leak tested.

[0075] When fixing the signal detection electrode 107 inside the titanium alloy inner liner bracket 104, the required signal detection electrode 107 is fixed inside the titanium alloy inner liner bracket 104 using the fastening nut 106, ensuring that the height of the fastening nut 106 is less than the height of the rib 109. A mechanical measuring arm is used for adjustment to control the parallelism tolerance between the signal detection electrode 107 and the titanium alloy inner liner bracket 104 in the vertical and horizontal directions within ±0.1mm.

[0076] During the process of pushing the titanium alloy inner liner bracket 104 into the thin-walled tube 102, the distance between the end face of the titanium alloy inner liner bracket 104 and the end face of the thin-walled tube 102 should be between 2 mm and 5 mm. At the same time, ensure that the feedthrough mounting holes 110 on the titanium alloy inner liner bracket 104 and the thin-walled tube 102 are aligned, and the coaxiality error should be less than 0.1 mm, ensuring that the titanium alloy inner liner bracket 104 and the thin-walled tube 102 fit tightly together.

[0077] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0078] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0079] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms are not limited to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compact beam tube, characterized by, include: The pipe wall structure is provided with a first pipe wall (100), a connector (103), and a second pipe wall (200) connected in sequence. A metal flange (101) is installed on the first pipe wall (100) and located at the first end of the pipe wall structure; A non-metallic flange (201) is installed on the second pipe wall (200) and located at the second end of the pipe wall structure; The outer layer of the first pipe wall (100) is a thin-walled pipe (102), the inner layer of the first pipe wall (100) is a titanium alloy inner lining support (104), the thin-walled pipe (102) is made of metal, the second pipe wall (200) is made of non-metal, the cross-sectional shape of the second pipe wall (200) is set to rectangular and is sealed to the first pipe wall (100) through the adapter (103); The titanium alloy inner liner support (104) includes: The rib (109) is configured as a ring that extends circumferentially and closes at both ends; A connecting plate (108) is installed on the inner circumferential side of the rib (109); A plurality of the ribs (109) are spaced apart along the length of the thin-walled tube (102), and a plurality of the connecting plates (108) extend along the length of the thin-walled tube (102); The first pipe wall (100) further includes: The signal detection electrode plate (107) is located on the inner circumferential side of the first tube wall (100) and is fixed to the connecting plate (108) by bolts; Feedthrough (105) is installed on the connecting plate (108) and extends through the thin-walled tube (102) to the outer periphery of the first tube wall (100).

2. The compact beam pipe of claim 1, wherein, The spacing between any two adjacent ribs (109) is between 10 mm and 15 mm.

3. A compact beam pipe according to claim 1 or 2, characterized in that, The thin-walled tube (102) is made of titanium alloy, and the thickness of the thin-walled tube (102) is between 0.1 mm and 0.3 mm.

4. A method for manufacturing a compact beam conduit, characterized in that, Applied to the compact beam pipe as described in any one of claims 1 to 3, the first tube wall (100) includes a thin-walled tube (102), a titanium alloy inner liner support (104), a signal detection electrode (107), and a feedthrough (105). The production method includes: S1. Process and assemble the various components of the first tube wall (100): respectively fabricate the thin-walled tube (102), titanium alloy inner liner bracket (104), signal detection electrode plate (107) and feedthrough (105), install the signal detection electrode plate (107) on the inner circumference of the titanium alloy inner liner bracket (104), embed the titanium alloy inner liner bracket (104) on the inner circumference of the thin-walled tube (102), insert the feedthrough (105) into the signal detection electrode plate (107), and then weld the feedthrough (105) to the thin-walled tube (102); S2. Machining the second pipe wall (200) and the adapter (103); S3. Use an adapter (103) to weld the first pipe wall (100) and the second pipe wall (200) together.

5. The method of claim 4, wherein the beam tube is compact. The methods for fabricating the thin-walled tube (102) and the titanium alloy liner support (104) include: Thin-walled tubes (102) are manufactured by extrusion molding using a mold, and titanium alloy inner lining supports (104) are manufactured by laser printing.

6. The method of claim 4, wherein the beam tube is formed by a process comprising: The process of mounting the signal detection electrode (107) to the inner circumference of the titanium alloy inner liner bracket (104) includes: The signal detection electrode plate (107) is fixed inside the titanium alloy inner liner bracket (104). The parallelism tolerance between the signal detection electrode plate (107) and the titanium alloy inner liner bracket (104) is measured and adjusted using a mechanical measuring arm, and the parallelism tolerance is controlled to be within ±0.1 mm.

7. The method of claim 4, wherein the beam tube is formed by a process comprising: The welding of the feedthrough (105) to the thin-walled tube (102) includes: During the welding process of feedthrough (105) and thin-walled tube (102), micro-beam plasma welding is used, and the welding current is controlled at 4A, the voltage at 30V and the welding speed at 3mm / s to achieve a reliable connection with minimal thermal deformation.

8. The method of claim 4, wherein the beam tube is compact. The process of welding the first pipe wall (100) and the second pipe wall (200) together using the adapter (103) includes: during the welding process, using a mechanical measuring arm to measure the coaxiality and parallelism of the metal flange (101) and the non-metal flange (201) in real time, and performing vacuum leak detection after welding to ensure that the leak rate is less than 5×10 -7 Pa·L / s.

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