A solenoid and test device for pulsed nuclear fusion small magnetic probe test

Abstract

The application relates to the technical field of nuclear fusion, in particular to a solenoid for testing a small magnetic probe ring of pulse nuclear fusion. The length of the solenoid for testing the small magnetic probe ring of pulse nuclear fusion is configured as 58+ / -0.1 mm, the winding outer diameter is configured as 48+ / -0.2 mm, the winding wire diameter is configured as 2+ / -0.01 mm, the winding layer number is configured as 4 layers, and the wire turn number is configured as 84 turns. The application can accurately calibrate and test a small magnetic probe ring to be calibrated with a three-dimensional size less than 10*10*10 mm and an area S<0.001 m 2 ​

Description

Technical Field

[0001] This application relates to the field of nuclear fusion technology, specifically to a solenoid for testing small magnetic probe coils in pulsed nuclear fusion. Background Technology

[0002] Currently produced magnetic field generating devices can meet the needs of most scientific research, physical engineering experiments, and technological development. However, for accurate testing of enclosed areas S smaller than 0.001m², specific applications are required. 2 When calibrating small magnetic field magnetocells, achieving a sufficiently high signal-to-noise ratio and accuracy is difficult. This is because these solenoids, to ensure a sufficiently uniform magnetic field, are typically constructed using thousands or even tens of thousands of turns of wire, and their length is generally quite long, ranging from 0.5 to 2 meters or even longer. The large number of turns in these solenoids results in very high inductance, making it difficult for a typical power supply to simultaneously provide sufficient current and frequency. This leads to a low signal-to-noise ratio and poor calibration accuracy when calibrating small magnetic field magnetocells. Furthermore, obtaining a sufficiently stable magnetic field requires a sufficiently stable current output and a smooth waveform from the power supply. These two limitations are often difficult to meet simultaneously, making them unsuitable for the accurate calibration of small magnetic field magnetocells used in pulsed nuclear fusion. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the background art, and to provide a solenoid and testing device for testing small magnetic probe coils of pulsed nuclear fusion, which can obtain better calibration accuracy in the testing of small magnetic probe coils of pulsed nuclear fusion.

[0004] This application is achieved through the following technical solution: In a first aspect, this application provides a solenoid for testing small magnetic probe coils in pulsed nuclear fusion, wherein the solenoid has a length of 58±0.1mm, an outer diameter of 48±0.2mm, a wire diameter of 2±0.01mm, 4 winding layers, and 84 turns of wire.

[0005] The solenoid provided in this application for testing small magnetic probe coils for pulsed nuclear fusion has reduced its length to 58±0.1 mm, its outer diameter to 48±0.2 mm, its winding wire diameter to 2±0.01 mm, its winding layers to 4, and its number of turns to 84. This reduces its inductance (from the Henry level of traditional thousand turns and meter-scale dimensions to the micro-Henry level) while still generating a sufficiently uniform magnetic field within a compact geometric space. Its low inductance allows it to be directly driven by a conventional high-stability, low-ripple power supply, achieving high-current, high-frequency, and smooth waveform output. This provides a high signal-to-noise ratio and high-precision calibration magnetic field for small magnetic probe coils for pulsed nuclear fusion with an area <0.001 m², overcoming the problems of low signal-to-noise ratio and large calibration errors caused by the current limitation, magnetic induction intensity limitation, and frequency limitation of traditional long solenoids due to high inductance.

[0006] In some optional embodiments, the solenoid is configured to have a length of 58 mm, a winding outer diameter of 48 mm, and a winding wire diameter of 2 mm.

[0007] Secondly, this application provides a testing apparatus for testing small magnetic probe coils used in pulsed nuclear fusion, comprising: The enclosure is configured to be assembled from plastic panels, and test holes are provided on the walls of the enclosure. The solenoid for testing small magnetic probes for pulsed nuclear fusion as described in the first aspect, wherein the solenoid is located inside the housing, and the inner hole of the solenoid is connected to the test hole so that the magnetic probe to be tested can be placed into the inner hole of the solenoid. A terminal block is located on the housing and is connected to the solenoid.

[0008] In some alternative embodiments, an adapter is coaxially inserted into the inner bore of the solenoid, the adapter having an inner bore for inserting the magnetic probe coil to be tested.

[0009] The testing device provided in this application for testing small magnetic probe coils for pulsed nuclear fusion encapsulates an ultra-low inductance solenoid within a shielded enclosure with a test hole, precisely aligning the inner hole of the solenoid with the opening in the enclosure to form a closed magnetic circuit into which the magnetic probe coil under test can be directly inserted. After the solenoid is connected to an external high-stability power supply via terminals on the enclosure, it outputs a calibration magnetic field with high uniformity and low ripple within an extremely short and compact space, significantly reducing environmental interference.

[0010] In some alternative embodiments, the adapter is clearance-fitted with the inner bore of the solenoid.

[0011] In some alternative embodiments, the adapter is configured as a round tube, and the outer diameter of the adapter differs from the inner diameter of the solenoid by a factor of 0.1 mm.

[0012] In some optional embodiments, the adapter's inner bore is constructed as a stepped bore, wherein the diameter of the major diameter section of the adapter's inner bore is adapted to the outer diameter of the magnetic probe coil to be tested, and the diameter of the minor diameter section of the adapter's inner bore is smaller than the outer diameter of the magnetic probe coil to be tested.

[0013] In some optional embodiments, the adapter's inner bore is used for clearance fitting with the magnetic probe coil to be tested, wherein the diameter of the large-diameter section of the adapter's inner bore is configured to have a difference of 0.1 mm from the outer diameter of the magnetic probe coil to be tested.

[0014] In some alternative embodiments, the inner wall of the enclosure is covered with a shielding layer.

[0015] In some alternative embodiments, the shielding layer is configured as copper foil, and the thickness of the shielding layer is configured to be 0.01~0.02 mm.

[0016] Compared with the prior art, this application has the following advantages and beneficial effects: 1. The solenoid provided in this application for testing small magnetic probe coils for pulsed nuclear fusion, by compressing its length to 58±0.1 mm, limiting its outer diameter to 48±0.2 mm, configuring the winding wire diameter to 2±0.01 mm, configuring the number of winding layers to 4 layers, and drastically reducing the number of turns to 84 turns, can generate a sufficiently uniform magnetic field in a compact geometric space while reducing its own inductance (from the Henry level of traditional thousands of turns and meter-scale dimensions to the micro-Henry level). The low inductance characteristic allows it to be directly driven by conventional high-stability, low-ripple power supplies to achieve high current, high frequency, and smooth waveform output. This provides a high signal-to-noise ratio and high-precision calibration magnetic field for small magnetic probe coils for pulsed nuclear fusion with an area of ​​<0.001 m², overcoming the problems of low signal-to-noise ratio and large calibration error caused by the current limitation, magnetic induction intensity limitation, and frequency limitation of traditional long solenoids due to high inductance.

[0017] 2. The testing device for testing small magnetic probe coils in pulsed nuclear fusion provided in this application encapsulates an ultra-low inductance solenoid in a shielded box with a test hole, so that the inner hole of the solenoid is precisely aligned with the hole in the box, forming a closed magnetic circuit into which the magnetic probe coil under test can be directly inserted; after the solenoid is connected to an external high-stability power supply through the terminal on the box, it outputs a calibration magnetic field with high uniformity and low ripple in an extremely short and compact space, greatly reducing environmental interference. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the embodiments of this application and form part of this application, do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1A schematic diagram of the simulation results of the magnetic field distribution of a solenoid for testing a small magnetic probe for pulsed nuclear fusion, provided in an embodiment of this application; Figure 2 A schematic diagram of the simulation results of the axial uniformity of the solenoid for testing a small magnetic probe for pulsed nuclear fusion, provided in an embodiment of this application. Figure 3 A schematic diagram of the simulation results of the radial uniformity of the center of the solenoid for testing a small magnetic probe for pulsed nuclear fusion, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the state structure of the test device for testing small magnetic probes for pulsed nuclear fusion provided in the embodiments of this application during the test process; Figure 5 This is a schematic cross-sectional view of the test device for testing small magnetic probes for pulsed nuclear fusion, provided in an embodiment of this application. Figure 6 This is a schematic diagram of the adapter structure provided in an embodiment of this application.

[0019] The attached diagram shows the markings and corresponding component names: 1-Box body, 2-Solenoid, 3-Terminal, 4-Adapter, 41-Large diameter section, 42-Small diameter section, 5-Magnetic probe coil to be tested. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this application are only for explaining this application and are not intended to limit this application.

[0021] Example 1 During their research, the inventors discovered that for three-dimensional dimensions smaller than 10×10×10mm, the area S < 0.001m² 2 The small magnetic probe coil to be calibrated does not require an excessively large solenoid. It only requires that the designed solenoid has a uniform region of ≥10mm in the central area, and the uniformity within the uniform region is better than the calibration requirement range (e.g., <0.1%).

[0022] Based on this, this application provides a solenoid for testing a small magnetic probe coil for pulsed nuclear fusion. The solenoid has a length of 58±0.1mm, an outer diameter of 48±0.2mm, a wire diameter of 2±0.01mm, 4 winding layers, and 84 turns of wire.

[0023] The solenoid provided in this application for testing small magnetic probe coils in pulsed nuclear fusion has a length not exceeding 60 mm, an outer diameter not exceeding 50 mm, 84 turns, an inductance not exceeding 1 mH, and a uniformity design value not exceeding 0.1% (within a 10 mm area), thereby obtaining a highly uniform magnetic field in space. Current input can be achieved through a 6.5-bit high-precision current source, with current stability reaching 0.01%, thus obtaining an ultra-stable magnetic field in time.

[0024] The solenoid's central magnetic field can reach 200 Gs, and its alternating magnetic field frequency reaches 400 Hz. The calibrated encircling area S is less than 0.001 m². 2 The magnetic probe coil has a signal output that can reach: This signal magnitude is sufficient to be accurately measured by instruments such as a 6.5-digit high-precision digital multimeter. Therefore, the solenoid provided in this embodiment can measure S~0.001m. 2 Even 0.0001m 2 Accurate calibration tests were conducted on small magnetic probes of similar size.

[0025] Example 2 like Figures 4-6 As shown, this application provides a testing device for testing small magnetic probe coils for pulsed nuclear fusion. The testing device includes a housing 1, terminals 3, and a solenoid 2 as described in the first aspect for testing small magnetic probe coils for pulsed nuclear fusion. The housing 1 can be designed as a rectangular housing 1, which includes a top plate, a bottom plate, and four side plates. In the usual operating position, the bottom plate is typically attached to the support platform. The top plate and the four side plates can be fastened together by bolts. The top plate of the housing 1... A test hole is provided on the top, which can be designed as a round hole; the solenoid 2 is located inside the housing 1, and the axis of the solenoid 2 is perpendicular to the surface of the top plate. The solenoid 2 can be arranged at the geometric center of the top plate. The inner hole of the solenoid 2 is connected to the test hole so that the magnetic probe 5 to be tested can be placed into the inner hole of the solenoid 2, that is, the magnetic probe 5 to be tested can be placed into the inner hole of the solenoid 2 through the test hole; the terminal 3 is located on the housing 1, and the terminal 3 can be connected to one of the side walls of the housing 1. The terminal 3 is connected to the solenoid 2, and after the terminal 3 is connected to the power supply, it can supply power to the solenoid 2.

[0026] In use, the power supply provides electrical energy to the solenoid 2 through the terminal 3, and the small magnetic probe 5 to be tested is placed into the inner hole of the solenoid 2 to carry out the test.

[0027] In some alternative embodiments, an adapter 4 is coaxially inserted into the inner hole of the solenoid 2, and the adapter 4 has an inner hole for inserting the magnetic probe 5 to be tested.

[0028] In this embodiment, after the adapter 4 is coaxially inserted into the inner hole, the magnetic probe coil 5 to be tested can be quickly and repeatedly positioned at the geometric center of the adapter's inner hole. This ensures axial consistency for each test and avoids mechanical damage to the coil, thereby achieving a combination of sub-millimeter positioning accuracy, high signal-to-noise ratio, and high repeatability in the batch calibration of small magnetic probe coils for pulsed nuclear fusion.

[0029] To facilitate the disassembly and assembly of the adapter 4 and the solenoid 2, in some optional embodiments, the adapter 4 and the inner hole of the solenoid 2 are clearance-fitted.

[0030] The gap between the adapter 4 and the inner hole of the solenoid 2 should not be too large, otherwise it will affect the positioning of the adapter 4 in the solenoid 2. It should also not be too small, as a small gap will make it difficult to disassemble and assemble the adapter 4 and the solenoid 2. In some optional embodiments, the adapter 4 is configured as a round tube, so that the adapter 4 has a shape that adapts to the solenoid 2, which can facilitate the disassembly and assembly of the adapter 4 and the solenoid 2. At the same time, the gap between the adapter 4 and the solenoid 2 in the circumferential direction is more uniform, and the outer diameter of the adapter 4 and the inner diameter of the solenoid 2 have a difference of 0.1 mm.

[0031] In some optional embodiments, the adapter 4 has a stepped inner hole, wherein the diameter of the large diameter section 41 of the adapter inner hole is adapted to the outer diameter of the magnetic probe coil 5 to be tested, and the diameter of the small diameter section 42 of the adapter inner hole is smaller than the outer diameter of the magnetic probe coil 5 to be tested.

[0032] In some alternative embodiments, the adapter inner hole of the adapter 4 is used for clearance fit with the magnetic probe coil 5 to be tested, wherein the diameter of the large diameter section 41 of the adapter inner hole is configured to have a difference of 0.1 mm from the outer diameter of the magnetic probe coil 5 to be tested.

[0033] In some alternative embodiments, the inner wall of the housing 1 is covered with a shielding layer.

[0034] In some alternative embodiments, the shielding layer is configured as copper foil, and the thickness of the shielding layer is configured to be 0.01~0.02mm.

[0035] In some alternative embodiments, the housing 1 is configured to be assembled from plastic panels.

[0036] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details are included in the above description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0037] It should be noted that in this specification, similar reference numerals and letters in the above figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this application, it should be noted that unless otherwise expressly specified and limited, the terms "installed," "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; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A solenoid for testing small magnetic probe coils in pulsed nuclear fusion, characterized in that, The solenoid has a length of 58±0.1mm, an outer diameter of 48±0.2mm, a wire diameter of 2±0.01mm, 4 winding layers, and 84 wire turns.

2. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 1, characterized in that, The solenoid is configured with a length of 58mm, an outer diameter of 48mm, and a wire diameter of 2mm.

3. A testing device for testing small magnetic probes in pulsed nuclear fusion, characterized in that, include: Box (1), the box (1) is configured to be spliced ​​together by plastic plates, and test holes are provided on the box wall of the box (1); The solenoid for testing small magnetic probe coils for pulsed nuclear fusion as described in claim 1, wherein the solenoid (2) is located inside the housing (1), and the inner hole of the solenoid (2) is connected to the test hole so that the magnetic probe coil (5) to be tested can be placed into the inner hole of the solenoid (2); Terminal (3) is located on the housing (1) and is connected to the solenoid (2).

4. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 3, characterized in that, The solenoid (2) has a coaxial adapter (4) inserted into its inner hole, and the adapter (4) has an inner hole for inserting the magnetic probe coil (5) to be tested.

5. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 4, characterized in that, The adapter (4) is clearance-fitted with the inner hole of the solenoid (2).

6. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 5, characterized in that, The adapter (4) is configured as a round tube, and the outer diameter of the adapter (4) has a difference of 0.1 mm from the inner diameter of the solenoid (2).

7. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 4, characterized in that, The adapter (4) has a stepped inner hole structure, wherein the diameter of the large diameter section (41) of the adapter inner hole is adapted to the outer diameter of the magnetic probe coil (5) to be tested, and the diameter of the small diameter section (42) of the adapter inner hole is smaller than the outer diameter of the magnetic probe coil (5) to be tested.

8. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 7, characterized in that, The adapter (4) has an inner hole for clearance fit with the magnetic probe coil (5) to be tested, wherein the diameter of the large diameter section (41) of the adapter is configured to have a difference of 0.1 mm from the outer diameter of the magnetic probe coil (5) to be tested.

9. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 3, characterized in that, The inner wall of the box (1) is covered with a shielding layer.

10. The solenoid for testing small magnetic probe coils in pulsed nuclear fusion according to claim 9, characterized in that, The shielding layer is configured as copper foil, and the thickness of the shielding layer is configured to be 0.01~0.02mm.

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