Method for manufacturing a spliced leather tube and use thereof

Abstract

The application provides a triangular wire and a preparation method and application thereof. The method comprises the following steps: processing a glass rod into a hexagonal rod with a radial section being a regular hexagon, and then drawing the hexagonal rod into a hexagonal wire; stacking and arranging the hexagonal wire in a mold with a radial section being a triangle, so that the side surfaces of each hexagonal wire abut to form a close packing, and a bundle rod is obtained, so that a triangular multifilament rod with a radial section being a triangle is obtained; and the triangular multifilament rod is drawn to obtain a triangular wire. The technical problem to be solved by the application is how to prepare a special-shaped wire with a triangular structure and apply the special-shaped wire to the preparation process of a micro-channel plate with a special-shaped hole structure combining a hexagonal taper hole and an inner cylinder, so that the obtained micro-channel plate has a high opening ratio, the micro-channel plate does not cause tip discharge when used in a high-field application scene, and the micro-channel plate does not cause abnormal increase of dark current, so that the micro-channel plate is more suitable for practical use.

Description

Technical Field

[0001] This invention relates to the field of microchannel plate manufacturing technology, and in particular to a triangular wire, its preparation method, and its application. Background Technology

[0002] Microchannel plates (MCPs), as a highly specialized glass-based functional material, have demonstrated remarkable application potential in multiple high-tech fields due to their unique structural properties. The aperture ratio of a microchannel plate is a key indicator for evaluating MCP performance. How to increase the aperture ratio of the channels to enhance their detection efficiency while ensuring structural strength is a key technical challenge in this field.

[0003] Existing technologies sometimes treat the input surface of a microchannel plate (MCP) as a funnel shape, achieving an opening ratio of 70% or even 90%. However, achieving a 90% opening ratio by flaring the microchannel plate end face inevitably results in a flared tip. This tip is highly susceptible to tip discharge in high-field applications, potentially damaging the microchannel plate or even the instrument. To address this, our team has proposed patent CN202311656564.6, which employs a uniquely shaped flared hole structure combining a hexagonal conical hole and an inner cylinder on the input surface of the MCP. This hexagonal dense-packing arrangement replaces the traditional hexagonal arrangement of circular channels, increasing the opening ratio to 91%. The hexagonal close-packed arrangement involves nesting a first, second, and third hexagonal sheath around a circular core rod. The first sheath has a circular inner surface and a hexagonal outer surface, while the second and third sheaths are hexagonal both inside and out. The three sheaths are made of materials with different etching properties, with the etching rate decreasing from the inside out. During MCP fabrication, the core rod is first removed by etching the blank, and then the MCP end faces are etched to widen. At the widened end faces of each channel, the first sheath is completely etched away, the second sheath is partially etched away, and the inner and outer edges of the third sheath are hexagonal, forming a honeycomb structure. However, when the first sheath is etched away, triangular residues that are difficult to completely remove remain at the apex of the six edges of the hexagonal sheath outside the first sheath. These residues may lead to adverse consequences such as an abnormal increase in dark current. Summary of the Invention

[0004] The main objective of this invention is to provide a triangular wire, its preparation method, and its application. The technical problem to be solved is how to prepare a triangular-structured shaped wire and apply it to the fabrication process of a microchannel plate with a hexagonal conical hole combined with an inner cylinder, thereby overcoming the performance bottleneck caused by corner residues in the hexagonal flaring etching process and improving the stability and efficiency of microchannel plates in key fields such as image intensifiers, ion detectors, and detection instruments. The microchannel plate prepared by this invention has a high aperture ratio, and will not cause tip discharge or abnormal increase in dark current when used in high field strength applications, thus making it more suitable for practical use.

[0005] The objective of this invention and the technical problem it solves are achieved through the following technical solution. A method for preparing triangular wire according to this invention includes the following steps:

[0006] S11 processes the glass rod into a hexagonal rod with a radial cross-section of regular hexagon, and then draws it into a hexagonal wire;

[0007] S12 The hexagonal wires are stacked in a mold with a triangular radial cross-section, so that the sides of each hexagonal wire abut against each other to form a dense stack, and the rod is bundled to obtain a triangular multifilament rod with a triangular radial cross-section.

[0008] S13 The triangular multifilament rod is drawn to obtain triangular wire.

[0009] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0010] Preferably, in the aforementioned preparation method, the mold comprises:

[0011] A plurality of triangular rod brackets, each triangular rod bracket including a bracket body; a groove is provided at the upper end of the bracket body, passing through the front end and the rear end of the bracket body; the groove is an isosceles triangle in a longitudinal section parallel to the front end and the rear end; the vertex of the isosceles triangle is located at the bottom end of the groove; the plurality of triangular rod brackets are arranged side by side, and the grooves on each triangular rod bracket are aligned with each other to form the main body of the triangular rod mold;

[0012] A fixing block is disposed above one of the several triangular rod brackets, closer to one side; the bottom surface of the fixing block is a plane; the bottom surface of the fixing block abuts against the side of the groove of the triangular rod bracket to form an isosceles triangular through hole.

[0013] The objective of this invention and the technical problem it solves are achieved by the following technical solution. A triangular wire according to this invention is prepared according to the aforementioned method for preparing triangular wires.

[0014] The objective of this invention and the technical problem it solves are achieved through the following technical solution. A method for preparing a spliced ​​leather tube according to this invention includes the following steps:

[0015] S41 grinds the six side edges of the raw material tube to form a flat surface; the inner contour of the radial section of the raw material tube is circular, and the outer contour is a regular hexagon.

[0016] S42 sets the aforementioned triangular wire at the plane, so that one side of the triangular wire is connected to the plane to form a spliced ​​leather tube; the radial cross section of the triangular wire is an isosceles triangle with a vertex angle of 120°; the side connected to the plane is the side corresponding to the base of the isosceles triangle; the inner contour of the spliced ​​leather tube is circular and the outer contour is hexagonal.

[0017] Preferably, in the aforementioned preparation method, the triangular wire in step S42 is made of a glass material that can be removed by acid etching, and its etching rate is greater than that of the raw material tube glass.

[0018] Preferably, in the aforementioned preparation method, the preparation steps of the triangular wire in step S42 are as follows:

[0019] S61 processes the glass rod into a hexagonal rod with a radial cross-section of regular hexagon, and then draws it into a hexagonal wire;

[0020] S62 The hexagonal wires are placed in a mold with a radial cross-section of an isosceles triangle with a vertex angle of 120° and stacked in n layers, so that the sides of each hexagonal wire abut against each other to form a dense stack, and then bundled into a rod to obtain a triangular multifilament rod with a radial cross-section of an isosceles triangle with a vertex angle of 120°; the 120° vertex angle of the mold is set downward; n is a natural number ≥2;

[0021] S63 The triangular multifilament rod is drawn to obtain triangular wire.

[0022] Preferably, in the aforementioned preparation method, the target height of the triangular multifilament rod in step S62 is h; the formula for calculating the distance x between opposite sides of the hexagonal wire in step S61 is as follows:

[0023] .

[0024] The objective of this invention and the technical problem it solves are achieved through the following technical solution. A method for preparing a microchannel plate according to this invention includes the following steps:

[0025] S81 consists of a third, a second, and a first sheath tube nested sequentially from the outside in, forming a composite sheath tube. The composite sheath tube is nested with a core rod to form a composite glass rod. The core rod is cylindrical. The first sheath tube is hexagonal inside and out, the second sheath tube is hexagonal inside and out, and the third sheath tube is hexagonal inside and out. The first, second, and third sheath glass have predetermined etching properties, with the etching rate of the first sheath glass ≥ the etching rate of the second sheath glass > the etching rate of the third sheath glass. The first sheath tube is a spliced ​​sheath tube prepared according to the aforementioned method. The glass of the triangular wire is made of the same material as the core rod.

[0026] S82 The composite glass rod is made into a blank plate, and the core glass and triangular wire glass in the blank plate are removed by etching to obtain a microchannel plate blank plate with circular channels and triangular channels.

[0027] S83 performs flaring etching on the first end face of the microchannel slab blank. At the flaring end face of each channel, the first skin glass is completely etched away, the second skin glass is partially etched away, and the inner and outer edges of the third skin glass are hexagonal, forming a honeycomb structure, so that the flaring end face of the channel is a hexagonal conical hole, thus obtaining a flared microchannel slab blank.

[0028] S84 The flared microchannel plate blank is made into a microchannel plate.

[0029] The objective of this invention and the technical problem it solves are achieved by the following technical solution. A microchannel plate according to this invention is prepared according to the aforementioned preparation method.

[0030] The objective of this invention and the technical problem it solves are achieved by the following technical solution: An application of the aforementioned microchannel plate in an image intensifier, ion detector, or detection instrument, according to this invention.

[0031] By employing the above technical solution, the triangular wire, its preparation method, and its application proposed in this invention have at least the following advantages:

[0032] The applicant discovered that the problems described in the background art could be solved by finely grinding the sharp edges of the hexagonal tubing into smooth bevels of a certain width, and then filling these gaps with triangular wires in the form of a glass material that can be removed by acid etching. However, according to the applicant's usual microchannel plate fabrication process, in order to completely remove the triangular residue in the apex region of the tubing, the sharp edges of the hexagonal tubing should at least be finely ground into smooth bevels with a width of 2.4 mm. Ideally, the filling triangular wires should be isosceles triangles with a base of 2.4 mm and an apex angle of 120°. However, due to the conventional diameter of the glass material rods that can be removed by acid etching (approximately 35 mm), scaling up the process would require the fabrication of triangular wires with a height of 10 mm, which is extremely difficult in practice. Even if rods with a diameter of up to 120 mm are used, the processing difficulty and cost are not negligible. At the same time, the current furnace diameter is generally limited to around 55 mm, which cannot accommodate triangular wires with a height exceeding 12 mm. Redesigning the furnace and producing large-diameter glass rods would not only be costly and time-consuming, but also result in huge material waste.

[0033] To address this, this invention proposes a triangular filament, its preparation method, and its application. It employs a mold with a specific structure and a triangular radial cross-section. Hexagonal filaments are arranged in a close-packed configuration by their sides abutting against each other, forming a tightly interlocking multifilament rod. This structure ensures that the hexagonal filaments do not shift during subsequent binding operations, and the bound multifilament rod retains its original structure formed in the triangular mold, allowing it to be drawn into a triangular filament with a controlled radial cross-section. The preparation of triangular filaments using this invention, particularly isosceles triangular filaments with a 120° apex angle, not only solves the challenges in specific microchannel plate designs and simplifies the manufacturing process, but also possesses high flexibility and scalability, providing new ideas for the design and production of various other irregularly shaped filaments in the future.

[0034] Furthermore, this invention applies the aforementioned triangular wires to the fabrication of spliced ​​tubing, ensuring that each apex of the tubing has a triangular wire. By controlling the material of the triangular wire to be the same as the material of the mandrel to be used in the spliced ​​tubing, the triangular wires on the outside of the tubing are completely removed simultaneously with the removal of the mandrel. This allows for the production of a microchannel plate blank with both circular and triangular channels during the S82 etching step in the subsequent microchannel plate fabrication process, overcoming the limitations of the prior art in fabricating hexagonal conical holes. The technical challenges in the process of creating a high aperture ratio microchannel plate with a hexagonal close-packed arrangement of irregularly shaped expanded holes combined with an inner cylinder have been addressed. This allows the first material to be completely removed during etching of the blank, including the portion of material that is difficult to remove by etching at the outer corner of the first material tube. As a result, the aperture ratio of the prepared microchannel plate is as high as 91% or more. It will not cause tip discharge or abnormal increase in dark current when used in high field strength applications, further improving the performance of the high aperture ratio microchannel plate.

[0035] As can be seen from the above, the core objective of this invention is to overcome the performance bottleneck caused by edge residue in the hexagonal flaring etching process, and to improve the stability and efficiency of microchannel plates in key fields such as image intensifiers, ion detectors, and detection instruments. At the same time, this invention not only focuses on solving specific problems, but also aims to open up new paths for the design and fabrication of irregularly shaped filaments, provide innovative inspiration for related fields, and encourage the exploration of more diversified solutions from the perspective of non-traditional raw material shapes to meet the various irregularly shaped filament fabrication challenges that may be encountered in the future.

[0036] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the apex wire layout in the triangular mold of the present invention;

[0038] Figure 2 This is a schematic diagram of the triangular bar array of the present invention;

[0039] Figure 3a This is the design drawing of the triangular rod mold of the present invention - the upper and lower isometric views;

[0040] Figure 3b This is the front view of the triangular bar mold design drawing of this invention;

[0041] Figure 3c This is the top view of the triangular bar mold design drawing of this invention;

[0042] Figure 3d This is the lower view of the triangular bar mold design drawing of the present invention;

[0043] Figure 4a This is the design drawing of the triangular rod bracket of the present invention - the upper and lower isometric projections;

[0044] Figure 4b This is the front view of the design drawing of the triangular rod bracket of the present invention;

[0045] Figure 5 The present invention relates to a triangular rod with a hexagonal hanging rod head;

[0046] Figure 6a This is a schematic diagram of the spliced ​​leather tube after its six corners have been ground flat in a specific embodiment of the present invention;

[0047] Figure 6b yes Figure 6a A schematic diagram of the radial section;

[0048] Figure 7 This is a magnified micrograph of a microchannel slab blank with circular and triangular channels obtained after etching and removing the core glass and triangular wire glass from the blank in a specific embodiment of the present invention.

[0049] Figure 8 These are graphs showing the dark current measurement data of the microchannel plates prepared in the embodiments and comparative examples of this invention. Detailed Implementation

[0050] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed description of the specific implementation methods, structures, features, and effects of a triangular wire and its preparation method according to the present invention. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable manner.

[0051] This invention proposes a method for preparing triangular wires, which includes the following steps:

[0052] S11 The glass rod is processed into a hexagonal rod with a radial cross-section of regular hexagon, and then drawn into a hexagonal wire. The preparation of the hexagonal rod can be carried out by conventional processing methods in the art, and the present invention does not make specific limitations on it. For example, the glass rod can be carefully polished into a hexagonal rod. The drawing of the hexagonal wire can be carried out by conventional processing methods in the art, and the present invention does not make specific limitations on it.

[0053] S12 involves stacking hexagonal wires in a mold with a triangular radial cross-section, so that the sides of each hexagonal wire abut against each other to form a dense pack, and then bundling them together to obtain a triangular multifilament rod with a triangular radial cross-section. This step is the key to the invention. By using a mold with a specific structure of a triangular radial cross-section, and by having the hexagonal wires abut against each other to form a dense pack, the hexagonal wires are stacked into a tightly fitted, interlocking multifilament rod. This structure effectively avoids the slippage problem caused by gaps when arranging round wires. Especially during the bundling and fixing operation, the triangular rod with tightly arranged hexagonal wires exhibits excellent stability and position retention, ensuring that the hexagonal wires do not shift during subsequent bundling operations. The bundled multifilament rod can still maintain its original structure formed in the triangular mold, thus allowing it to be drawn into a triangular wire with a controlled radial cross-section.

[0054] S13 draws a triangular multifilament rod to obtain triangular wire.

[0055] To adapt to the needs of different application scenarios, the head hanging rod part in this step adopts a modular design, which can be freely adjusted and modified according to the existing hanging rod head shape, as shown in the attached figure. Figure 5 As shown, when only hexagonal hanging rod heads are available, short filaments can be cleverly arranged at the front end of the triangular rod to form a hexagonal rod head, thereby achieving compatibility with different hanging rod heads, enhancing compatibility with hanging rod heads, improving the flexibility and practicality of the overall structure, and broadening the scope of application and practicality of the present invention.

[0056] To ensure a more effective close packing effect by allowing the hexagonal wires to adjust their positions under gravity during arrangement, the present invention preferably designs the aforementioned triangular mold as an isosceles triangle with its apex pointing downwards. In a specific embodiment of the present invention, as shown in the attached figure… Figure 2 Appendix Figures 3a-3d and attached Figures 4a-4bAs shown, the triangular bar mold includes several triangular bar brackets and fixing blocks. Specifically, each triangular bar bracket includes a bracket body; a radially triangular groove is provided at the upper end of the bracket body, penetrating the front and rear ends of the bracket body; the groove is an isosceles triangle in the longitudinal section parallel to the front and rear ends, that is, the longitudinal section is perpendicular to the three edges of the triangle; the vertex of the isosceles triangle is located at the bottom end of the groove, so that the hexagonal wires can be tightly stacked to form an interlocking structure by means of gravity when stacking; several triangular bar brackets are arranged side by side, and the grooves on each triangular bar bracket are aligned with each other to form the main body of the triangular bar mold; in a specific embodiment of the present invention, 3 to 4 auxiliary inverted triangular brackets are also provided, so that when arranging the hexagonal wires, each multi-wire crosses several triangular bar brackets at the same time to ensure that the tail wire can also be stably fixed, thereby improving the overall structural strength. A fixing block is positioned above one of the triangular rod brackets near one side among several triangular rod brackets. The bottom surface of the fixing block is flat. The bottom surface of the fixing block abuts against the side of the groove of the triangular rod bracket to form an isosceles triangular through hole. The fixing block is used to fix and clamp the arranged hexagonal wires, which facilitates bundling and binding to ensure that the hexagonal wires can still maintain a densely packed meshing structure after being bundled, so that the controlled triangular wire structure can still be generated after being drawn.

[0057] The dimensions and angles of the isosceles triangular mold and its supporting components used in the above preparation process can be customized as needed to meet diverse production requirements.

[0058] This invention also proposes a triangular wire, which is prepared according to the aforementioned method for preparing triangular wires. This triangular wire is designed for application in the fabrication of microchannel plates with specific structures. Specific details are as follows:

[0059] This invention proposes a method for preparing spliced ​​leather tubes, which includes the following steps:

[0060] S41 grinds the six side edges of the raw material tube to form a flat surface, and its structure after grinding is shown in the attached figure. Figure 6a and attached Figure 6b As shown; the inner contour of the radial cross-section of the raw material tube is circular, and the outer contour is a regular hexagon.

[0061] S42 sets the aforementioned triangular wires on the plane, so that one side of the triangular wires is connected to the ground plane to form a spliced ​​leather tube; the connection here can be by bundling or binding and then welding, or by gluing the ends of the wires and then welding, the present invention does not specifically limit this; the radial cross section of the triangular wires is an isosceles triangle with a vertex angle of 120°; the side connected to the plane is the side corresponding to the base of the isosceles triangle; the inner contour of the spliced ​​leather tube is circular and the outer contour is hexagonal.

[0062] In the above technical solution, in order to enable the triangular wire to be etched and removed together with the mandrel during the mandrel etching process, the material of the triangular wire in step S42 of the present invention is preferably a glass material that can be removed by acid etching, and its etching rate is greater than that of the raw material tube glass; further preferably, the material of the triangular wire glass is the same as that of the mandrel glass.

[0063] In the above technical solution, the preparation steps of the triangular wire in step S42 are as follows:

[0064] S61 processes the glass rod into a hexagonal rod with a radial cross-section of regular hexagon, and then draws it into a hexagonal wire.

[0065] S62 places hexagonal wires in a mold with a radial cross-section of an isosceles triangle and a vertex angle of 120°, stacking n layers so that the sides of each hexagonal wire abut against each other to form a dense stack, and then bundles them together to obtain a triangular multifilament rod with a radial cross-section of an isosceles triangle and a vertex angle of 120°; the 120° vertex angle of the mold is set downward; n is a natural number ≥2.

[0066] S63 draws a triangular multifilament rod to obtain triangular wire.

[0067] In the above technical solution, the precise control of the diameter (distance between opposite sides) of the hexagonal wires is beneficial to ensure that the triangular multifilament rods can be tightly clamped within the through holes enclosed by the mold bracket and the fixing block after arrangement. This allows the hexagonal wires in the triangular multifilament rods to fit tightly together during subsequent bundling and binding operations, preventing them from shaking and becoming misaligned or scattered. This helps to better maintain the original triangular state after arrangement, thereby controlling the shape and size of the triangular wires.

[0068] To precisely control the diameter of the hexagonal wire, the present invention preferably sets the target height of the triangular multifilament rod to h in step S62; the formula for calculating the distance x between opposite sides of the hexagonal wire in step S61 is as follows:

[0069] .

[0070] The calculation process is explained in detail below: Let the height of the mold, which is an isosceles triangle with a vertex angle of 120° (i.e., the target height of the triangular multifilament rod), be h. Let the diameter of the hexagonal wire to be drawn be x, and the number of layers of hexagonal wire within the mold be n. The arrangement of the hexagonal wire placed at the vertex of the mold is shown in the attached figure. Figure 1 As shown, using the Pythagorean theorem, the length of a single side of the hexagonal wire can be calculated to be approximately, and then the perpendicular distance from the bottom edge of the wire at the vertex to the vertex can be derived as:

[0071]

[0072] Based on the above relationships, we construct the following equation:

[0073] Solving this equation yields the formula for calculating the diameter (distance between opposite sides) x of the hexagonal wire.

[0074] The formula for calculating the diameter of the hexagonal wire can be flexibly adjusted according to the shape and size of the triangular wire, as described above. This invention will not list them all.

[0075] This invention also proposes a method for preparing a microchannel plate using the above-mentioned spliced ​​tubing, which includes the following steps:

[0076] S81 consists of a third, a second, and a first sheath tube nested sequentially from the outside in, forming a composite sheath tube. The composite sheath tube is nested with a core rod to form a composite glass rod. The core rod is cylindrical. The first sheath tube is hexagonal inside and out, the second sheath tube is hexagonal inside and out, and the third sheath tube is hexagonal inside and out. The first, second, and third sheath glass have preset etching properties, with the etching rate of the first sheath glass ≥ the etching rate of the second sheath glass > the etching rate of the third sheath glass. The first sheath tube is a spliced ​​sheath tube prepared according to the aforementioned preparation method. The glass of the triangular wire is made of the same material as the core rod.

[0077] S82 fabricates a composite glass rod into a blank plate. The core glass and triangular wire glass are then removed from the blank plate through etching, resulting in a microchannel plate blank with circular and triangular channels, as shown in the attached figure. Figure 7 As shown.

[0078] S83 performs flaring etching on the first end face of the microchannel slab. At the flaring end face of each channel, the first skin glass is completely etched away, the second skin glass is partially etched away, and the inner and outer edges of the third skin glass are hexagonal, forming a honeycomb structure, so that the flaring end face of the channel is a hexagonal conical hole, thus obtaining the flared microchannel slab.

[0079] S84 uses a flared microchannel plate blank to form a microchannel plate.

[0080] This invention also proposes a microchannel plate, which is prepared according to the aforementioned preparation method. Through the above technical solution, this invention prepares an isosceles triangular structure with triangular wires having a vertex angle of 120°. By uniquely designing and fabricating the blank, and subsequently removing the triangular wires through acid etching, it can effectively solve the performance problems caused by the six corners remaining after etching in traditional hexagonal conical microchannel plates.

[0081] Furthermore, in this invention, the triangular wire is prepared by further processing a triangular multifilament rod made of precisely arranged hexagonal wires, thus achieving precise control from basic materials to the final product.

[0082] The present invention also proposes an application of the aforementioned microchannel plate in an image intensifier, ion detector, or detection instrument.

[0083] The present invention also proposes a triangular rod mold, which includes:

[0084] A plurality of triangular rod brackets, each triangular rod bracket including a bracket body; a groove is provided at the upper end of the bracket body, passing through the front end and the rear end of the bracket body; the groove is an isosceles triangle in a longitudinal section perpendicular to the front end and the rear end; the vertex of the isosceles triangle is located at the bottom end of the groove; the plurality of triangular rod brackets are arranged side by side, and the grooves on each triangular rod bracket are aligned with each other to form the main body of the triangular rod mold;

[0085] A fixing block is disposed above one of the several triangular rod brackets, closer to one side; the bottom surface of the fixing block is a plane; the bottom surface of the fixing block abuts against the side of the groove of the triangular rod bracket to form an isosceles triangular through hole.

[0086] The present invention will be further described below with reference to specific embodiments, but this should not be construed as a limitation on the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention still fall within the scope of protection of the present invention. Example

[0087] In this embodiment, a triangular wire was prepared, and a spliced ​​leather tube was fabricated using the triangular wire. Furthermore, a microchannel plate was fabricated. The specific steps are as follows:

[0088] 1) Prepare the triangular bar mold according to the dimensions: In this embodiment, the radial cross-section of the triangular bar mold is an isosceles triangle with a vertex angle of 120°, and the height h of the inner groove of the mold is 9mm; as shown in the attached... Figure 2 As shown, the triangular rod mold includes five triangular rod brackets arranged side by side, with the grooves on each triangular rod bracket aligned with each other to form the main body of the triangular rod mold; a fixing block is provided at the end of the triangular rod bracket.

[0089] 2) Prepare hexagonal wires according to the dimensions: The hexagonal rod material is the same glass as the microchannel plate core rod glass; draw the hexagonal rod into hexagonal wires with a side-to-side distance of 0.524mm.

[0090] 3) Arrange hexagonal wires in the triangular rod mold: as shown in the attached diagram. Figure 1 As shown, the first hexagonal wire is placed symmetrically in the center of the top corner of the mold, and then the hexagonal wires are stacked layer by layer in a side-attacking manner; a total of 17 layers are stacked and then bundled.

[0091] 4) Drawing triangular multifilament rods into triangular wires: as shown in the attached figure. Figure 5As shown, short filaments are arranged at the front end of the side of the base of the triangular rod to form a hexagonal rod head, which is then drawn into a triangular wire in conjunction with the hexagonal hanging rod head.

[0092] 5) Preparation of spliced ​​leather tubes: Prepare the first leather tube according to the dimensions. Its radial cross-section has an inner contour that is circular and an outer contour that is a regular hexagon. Grind the six outer corners of the first leather tube to form a smooth surface with a width of 2.4mm, as shown in the attached figure. Figure 6b As shown, the above-drawn triangular wires are bundled together with the bottom side facing the polished surface to form a spliced ​​leather tube.

[0093] 6) Microchannel plate fabrication:

[0094] A. Based on the dimensional design, prepare a second and a third hexagonal inner and outer sheath tube, as well as a cylindrical core rod. Nest the third, second, and spliced ​​sheath tubes sequentially from the outside in to form a composite sheath tube; nest the core rod within the composite sheath tube to form a composite glass rod; wherein, the etching rate of the first sheath glass is ≥ the etching rate of the second sheath glass > the etching rate of the third sheath glass; and the sheath glass is resistant to acid corrosion, while the core glass is easily corroded by acid.

[0095] B. The composite glass rod is drawn using monofilaments and multifilaments. After the multifilaments are arranged to the specified specifications, they are melted and pressed into blank sections. Then, after slicing, chamfering, grinding, and polishing, a blank plate is obtained. Through acid etching, the core glass material in the blank plate and the triangular wires on the outside of the splicing tubing are removed, forming multiple through-hole circular micropores and triangular holes, as shown in the attached diagram. Figure 7 As shown, the composite glass is retained to form the composite channel wall, thus forming the microchannel slab blank.

[0096] C. The first end face of the microchannel slab is etched with an flared end face. At each flared end face, the first layer of glass is completely etched away, the second layer of glass is partially etched away, and the inner and outer edges of the third layer of glass are hexagonal, forming a honeycomb structure, so that the flared end face of the aforementioned channel is a hexagonal conical hole, thus obtaining a flared microchannel slab.

[0097] D. After the microchannel plate flared blank is plated with metal electrodes, a material with a high secondary electron emission coefficient is deposited on the flared end face to cover the end face of the third skin glass. This end face coincides with the entrance end face of the hexagonal pyramidal hole formed after the first skin glass and the second skin glass are etched, and a part of the hexagonal pyramidal surface is in the first skin glass and the second skin glass to obtain the microchannel plate.

[0098] Ten microchannel plates prepared using the method of this embodiment at different time periods were taken, and the dark current of the microchannel plates was measured. The test data are shown in Table 1.

[0099] Table 1

[0100]

[0101] Comparative Example

[0102] Similar to Example 1, the difference is that the first material tube is not spliced ​​with triangular wires, and the first material tube is directly used to replace the spliced ​​material tube for the preparation of microchannel plates.

[0103] The detection method is the same as in Example 1, and the test data are shown in Table 2.

[0104] Table 2

[0105]

[0106] To provide a more intuitive understanding of the dark current level of the microchannel plate, this invention presents bar charts showing the dark current measurements of the microchannel plates prepared in the above embodiments and comparative examples, as shown in the attached figures. Figure 8 As shown in the figure, the dark current test data reveals that the microchannel plate prepared in this embodiment of the invention has extremely low dark current, with the maximum dark current among the 10 samples being as low as 0.00573 pA / cm. 2 However, microchannel plates fabricated using existing technologies exhibit higher dark currents; for example, in the comparative example, the minimum dark current reaches as high as 0.382 pA / cm. 2 Simple calculations show that the technical solution of this invention can reduce dark current by 6.7 to 40 times; (The attached text appears to be incomplete and requires further context.) Figure 8 It can also be intuitively shown that the lowest dark current in the comparative example is much greater than the highest dark current in the embodiment.

[0107] The technical features in the claims and / or specification of this invention can be combined, and the combination is not limited to the combinations obtained through reference in the claims. Technical solutions obtained by combining the technical features in the claims and / or specification are also within the scope of protection of this invention.

[0108] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method of manufacturing a spliced hide tube, characterized by, It comprises the following steps: S41 polish the six side edges of the raw skin tube to form a plane; the inner contour line of the radial section of the raw skin tube is circular, and the outer contour line is regular hexagonal; S42 set a triangular wire at the plane, so that one side of the triangular wire is connected with the plane to form a spliced skin tube; the radial section of the triangular wire is an isosceles triangle with a top angle of 120°; the side connected with the plane is the side corresponding to the base of the isosceles triangle; the inner contour line of the spliced skin tube is circular, and the outer contour line is hexagonal; the preparation method of the triangular wire comprises the following steps: S11 process a glass rod into a hexagonal rod with a radial section in the shape of a regular hexagon, and then draw it into a hexagonal wire; S12 stack and arrange the hexagonal wires in a mold with a radial section in the shape of a triangle, so that the sides of each hexagonal wire abut to form a close packing, and then bundle the rods to obtain a triangular multifilament rod with a radial section in the shape of a triangle; the mold comprises: a plurality of triangular rod holders, each triangular rod holder comprising a holder body; a groove is arranged at the upper end of the holder body and penetrates through the front end and the rear end of the holder body; the groove is in the shape of an isosceles triangle in the longitudinal section parallel to the front end and the rear end; the top angle of the isosceles triangle is arranged at the bottom end of the groove; a plurality of the triangular rod holders are arranged side by side, and the grooves on each of the triangular rod holders are arranged in alignment with each other to form the main body of the triangular rod mold; a fixing block is arranged above the triangular rod holder close to one side; the bottom surface of the fixing block is a plane; the bottom surface of the fixing block and the side surface of the groove of the triangular rod holder abut to form an isosceles triangular through hole; S13 draw the triangular multifilament rod to obtain a triangular wire.

2. The production method according to claim 1, characterized by, The material of the triangular wire in step S42 is a glass material that can be removed by acid etching, and the etching rate is greater than that of the raw skin tube glass.

3. The preparation method according to claim 1, characterized in that, The preparation steps of the triangular wire in step S42 are as follows: S61 process a glass rod into a hexagonal rod with a radial section in the shape of a regular hexagon, and then draw it into a hexagonal wire; S62 stack and arrange the hexagonal wires in a mold with a radial section in the shape of an isosceles triangle with a top angle of 120° for n layers, so that the sides of each hexagonal wire abut to form a close packing, and then bundle the rods to obtain a triangular multifilament rod with a radial section in the shape of an isosceles triangle with a top angle of 120°; the 120° top angle of the mold is arranged downward; n is a natural number greater than or equal to 2; S63 draw the triangular multifilament rod to obtain a triangular wire.

4. The production method according to claim 3, characterized by, The target height of the triangular multifilament rod in step S62 is h; and the calculation formula of the opposite side distance x of the hexagonal wire in step S61 is as follows: 。 5. A method of manufacturing a microchannel plate, characterized by, It comprises the following steps: S81 sequentially nest the third leather tube, the second leather tube and the first leather tube from outside to inside to form a leather composite sleeve; the leather composite sleeve nests the core material rod to form a composite glass rod; the core material rod is cylindrical, the first leather tube is in the shape of inner circle and outer hexagon, the second leather tube is in the shape of inner and outer hexagon, and the third leather tube is in the shape of inner and outer hexagon; the first leather glass, the second leather glass and the third leather glass have a preset etching property, the etching rate of the first leather glass is greater than the etching rate of the second leather glass, and the etching rate of the second leather glass is greater than the etching rate of the third leather glass; the first leather tube is a spliced leather tube prepared by the preparation method according to any one of claims 1 to 4; the glass of the triangular wire is the same in material as the core material rod; S82 form the composite glass rod into a blank plate, remove the core material glass and the triangular wire glass in the blank plate by etching to obtain a microchannel plate blank plate with circular channels and triangular channels; S83 perform flared etching on the first end face of the microchannel plate blank plate, at the flared end face of each channel, the first leather glass is completely etched and removed, the second leather glass is partially etched and removed, the inner and outer edges of the third leather glass are in the shape of hexagon, a honeycomb structure is formed, the flared end face of the channel is a hexagonal taper hole, and a flared microchannel plate blank plate is obtained; S84 form the flared microchannel plate blank plate into a microchannel plate.

6. A microchannel plate characterized by It is prepared according to the preparation method of claim 5.

7. Application of the microchannel plate of claim 6 in an image intensifier, an ion detector or a detection instrument.

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