A planar direct-heated cathode structure

Abstract

The utility model discloses a plane direct heating type cathode structure, including cathode main part, be located on the interface subassembly of cathode main part to the interface subassembly of a plurality of conductive components of connection, interface subassembly includes the first interface and the second interface of opposite setting in cathode main part both ends, and conductive component includes the conductive groove of being located in cathode to main part edge, and the conductive band of being located in the both ends of conductive groove respectively, at least one end of arbitrary conductive groove with the edge of cathode main part meets, and the conductive groove of being located in cathode main part both ends staggered setting, and are connected through conductive band. The utility model discloses through setting up the conductive groove of regular shape, the conductive band, the first interface and the second interface on the circular cathode main part, through calculating its area to calculate the actual cathode heat emission area accurately, is used for accurate measurement heat emission capacity of the active substance of heat emission capacity weaker.

Description

Technical Field

[0001] This utility model relates to the field of precise measurement of the thermal emission capability of a directly heated cathode, specifically to a planar directly heated cathode structure. Background Technology

[0002] With the increasing demands of microwave communication, radar, and high-energy physics experiments, traditional indirect-heated cathodes, due to their large thermal inertia and slow response speed, are gradually failing to meet the requirements of high-frequency, high-power devices. Against this backdrop, directly-heated cathodes, due to their ability to directly heat the emitter, have become a key breakthrough direction for solving the problem of heat conduction delay.

[0003] Traditional direct-heated cathode thermal emission testing methods involve coating a cylindrical W-wire or Re-W-wire with an electron-emitting active material, threading the wire through a molybdenum cylinder, and then heating it to perform the thermal emission test. The problem is that the wire diameter after coating with the active material cannot be accurately measured, making it impossible to accurately calculate the cathode's emission area. Consequently, the thermal emission capability of the electron-emitting active material cannot be precisely measured, and it is difficult to ensure that the cathode wire is centered within the molybdenum cylinder. Although some researchers later fabricated disc-shaped direct-heated cathodes from the cylindrical W-wire or Re-W-wire, estimating the thermal emission area using the projected area of ​​the disc, this method still cannot accurately calculate the actual thermal emission area of ​​the cathode. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a planar direct-heated cathode structure, which aims to solve the problem that the actual cathode thermal emission area cannot be calculated in the current traditional direct-heated cathode thermal emission test.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a planar direct-heating cathode structure, characterized in that the planar direct-heating cathode structure includes a cathode body, an interface component disposed on the cathode body, and a plurality of conductive components connected to the interface component; The interface component includes a first interface and a second interface disposed opposite to each other at both ends of the cathode body; The conductive component includes a conductive trench disposed from the cathode to the edge of the main body, and conductive strips disposed at both ends of the conductive trench; In this embodiment, at least one end of any of the conductive trenches intersects with the edge of the cathode body, and the conductive trenches at both ends of the cathode body are staggered and connected by the conductive strip.

[0006] According to one aspect of the above technical solution, the distance between the intersection points of the first interface and the second interface with the arc of the cathode body is equal to the diameter of the cathode body.

[0007] According to one aspect of the above technical solution, the distance between the first interface and the second interface is in the range of 25mm-50mm.

[0008] According to one aspect of the above technical solution, the lengths of the first interface and the second interface are equal.

[0009] According to one aspect of the above technical solution, all conductive trenches on the cathode body are of equal length and are arranged in parallel.

[0010] According to one aspect of the above technical solution, the length of the conductive trench ranges from 2mm to 4mm.

[0011] According to one aspect of the above technical solution, all conductive strips on the cathode body have equal widths and are arranged in parallel.

[0012] According to one aspect of the above technical solution, the conductive strip is arranged perpendicularly to the connected conductive trench.

[0013] According to one aspect of the above technical solution, the first interface, the second interface, the conductive trench, and the conductive strip are all located within the projected area of ​​the cathode body.

[0014] According to one aspect of the above technical solution, the cathode body is circular.

[0015] In summary, the planar direct-heating cathode structure proposed in this invention designs the cathode body as a circle, intersecting at least one end of the conductive trench with the cathode body, and simultaneously arranging the conductive strip perpendicular to the conductive trench. By calculating the projected area of ​​the conductive trench, conductive strip, first interface, and second interface on the cathode body, the heat emission area can be calculated, which is used to accurately measure the heat emission capability of active materials with weak heat emission capabilities. This invention, by setting regularly shaped conductive trenches, conductive strips, first interfaces, and second interfaces on a circular cathode body, calculates their areas to accurately calculate the actual heat emission area of ​​the cathode, which is used to accurately measure the heat emission capability of active materials with weak heat emission capabilities.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a planar direct-heating cathode structure in one embodiment of the present invention; Figure 2 This is a schematic diagram of the first interface structure in one embodiment of the present invention; Figure 3 This is a schematic diagram of the second interface structure in one embodiment of the present invention; Figure 4 This is a schematic diagram of the conductive trench structure in one embodiment of the present invention.

[0018] Component symbol explanation in the attached diagram: First interface 1, second interface 2, conductive trench 3, conductive strip 4, cathode body 5. Detailed Implementation

[0019] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0021] In this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0022] Please see Figures 1-4 The image shows a planar direct-heated cathode structure according to an embodiment of the present invention. This planar direct-heated cathode structure includes a cathode body, an interface assembly disposed on the cathode body, and a plurality of conductive components connected to the interface assembly, wherein: To facilitate the calculation of the actual heat emission area of ​​the cathode, the cathode body 5 is designed with a regular shape to facilitate subsequent calculation of the heat emission area. The first interface 1, the second interface 2, the conductive trench 3, and the conductive strip 4 are all located within the projected area of ​​the cathode body 5. In this embodiment, a circle is used as an example. The interface assembly includes a first interface 1 and a second interface 2 disposed opposite to each other at both ends of the cathode body 5. The conductive assembly includes a conductive trench 3 disposed from the cathode to the edge of the body, and conductive strips 4 disposed at both ends of the conductive trench. At least one end of any conductive trench 3 intersects with the edge of the cathode body 5, and the conductive trenches 3 disposed at both ends of the cathode body 5 are staggered and connected by the conductive strips 4.

[0023] Furthermore, the distance between the intersection points a and b of the arc of the first interface 1 and the second interface 2 with the cathode body 5 is equal to the diameter of the cathode body 5. Therefore, the first interface 1 and the second interface 2 are on the same diameter line, and the length L1 of the first interface 1 and the length L2 of the second interface 2 are equal, with a length range of 3mm-5mm. The distance between the first interface 1 and the second interface 2 (i.e., the diameter of the cathode body 5) is 25mm-50mm. When the first interface 1 and the second interface 2 are used to connect the power supply, they are interchangeable, and there is no need to limit the first interface 1 or the second interface 2 to only connect the positive or negative terminal.

[0024] Since this embodiment takes a circle as an example, at least one end of any conductive groove 3 intersects with the edge of the cathode body 5. Since all conductive grooves 3 on the cathode body 5 have the same length and are arranged in parallel, and the length range d1 of the conductive groove 3 is 2mm-4mm, the projected area of ​​the conductive groove 3 on the current cathode body 5 can be calculated by calculating the length and width of the conductive groove 3.

[0025] Furthermore, all conductive strips 4 on the cathode body 5 have the same width and are arranged in parallel, with a width d2 ranging from 0.5mm to 2.0mm and a thickness on the cathode body 5 ranging from 0.25mm to 0.50mm. The conductive strips 4 are arranged perpendicularly to the connected conductive grooves 3, so that the two conductive grooves 3 at both ends of the same conductive strip 4 form a "Z" shape with the conductive strip 4, thereby making the actual heat emission area the area of ​​the serpentine heating region on the cathode body 5.

[0026] In summary, the planar direct-heating cathode structure proposed in this invention designs the cathode body as circular, intersecting at least one end of the conductive trench with the cathode body, and simultaneously arranging the conductive strip perpendicular to the conductive trench. By calculating the projected area of ​​the conductive trench, conductive strip, first interface, and second interface on the cathode body, the heat emission area can be calculated, which is used to accurately measure the heat emission capability of active materials with weak heat emission capabilities. This invention, by setting regularly shaped conductive trenches, conductive strips, first interface, and second interface on a circular cathode body, calculates their areas to accurately calculate the actual heat emission area of ​​the cathode, which is used to accurately measure the heat emission capability of active materials with weak heat emission capabilities.

[0027] 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 do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A planar direct-heating cathode structure, characterized in that, The planar direct-heating cathode structure includes a cathode body, an interface assembly disposed on the cathode body, and a plurality of conductive components connected to the interface assembly; The interface component includes a first interface and a second interface disposed opposite to each other at both ends of the cathode body; The conductive component includes a conductive trench disposed from the cathode to the edge of the main body, and conductive strips disposed at both ends of the conductive trench; In this embodiment, at least one end of any of the conductive trenches intersects with the edge of the cathode body, and the conductive trenches at both ends of the cathode body are staggered and connected by the conductive strip.

2. The planar direct-heating cathode structure according to claim 1, characterized in that, The distance between the intersection points of the first interface and the second interface with the arc of the cathode body is equal to the diameter of the cathode body.

3. The planar direct-heating cathode structure according to claim 2, characterized in that, The distance between the first interface and the second interface ranges from 25mm to 50mm.

4. The planar direct-heating cathode structure according to claim 3, characterized in that, The lengths of the first interface and the second interface are equal.

5. The planar direct-heating cathode structure according to claim 1, characterized in that, All conductive trenches on the cathode body are of equal length and are arranged in parallel.

6. The planar direct-heating cathode structure according to claim 5, characterized in that, The length of the conductive trench ranges from 2mm to 4mm.

7. The planar direct-heating cathode structure according to claim 1, characterized in that, All conductive strips on the cathode body are of equal width and arranged in parallel.

8. The planar direct-heating cathode structure according to claim 7, characterized in that, The conductive strip is perpendicular to the connected conductive trench.

9. The planar direct-heated cathode structure according to claim 1, characterized in that, The first interface, the second interface, the conductive trench, and the conductive strip are all located within the projected area of ​​the cathode body.

10. The planar direct-heated cathode structure according to claim 1, characterized in that, The cathode body is circular.

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