Low-temperature sample rod and low-temperature measuring device for liquid helium environment

Abstract

The invention relates to the technical field of low-temperature tests, in particular to a low-temperature sample rod and a low-temperature measuring device for a liquid helium environment, and the low-temperature sample rod comprises a guide pipe which is made of a composite material of glass fiber and epoxy resin; the supporting part is connected with the end part of the guide pipe; and the detection part comprises a PCB and a low-temperature superconducting wire, the PCB is fixed on the supporting part, and the low-temperature superconducting wire is arranged in the conduit in a penetrating manner and is connected with the PCB. The low-temperature sample rod of the conduit is made of a G10 material with high heat insulation performance, so that heat isolation between a room-temperature part and a liquid helium low-temperature environment is ensured, liquid helium loss caused by heat conduction is further reduced, consumption loss of liquid helium is effectively reduced, use efficiency is improved, economical efficiency and sustainability of an experiment are enhanced, and low-temperature experiment cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of low temperature testing, and in particular to a low temperature sample rod and a low temperature measuring device for a liquid helium environment. Background Art

[0002] In low-temperature physics experiments, liquid helium is widely used as a refrigerant in the testing and research of superconducting materials and equipment.

[0003] However, existing cryogenic sample rods have some problems when used in liquid helium environments. On the one hand, most sample rods are not designed for the special caliber of liquid helium tanks, and cannot effectively save liquid helium, resulting in increased consumption. Since liquid helium itself is expensive and resources are limited, the experimental cost is further increased. On the other hand, there are deficiencies in preventing heat conduction from room temperature to the liquid helium cryogenic environment, which affects the stability of the liquid helium cryogenic environment, and may have an adverse effect on the accuracy of impedance measurement. Summary of the invention

[0004] The present invention provides a cryogenic sample rod and a cryogenic measuring device for a liquid helium environment, which are used to solve one of the defects in the prior art. The cryogenic sample rod with a guide tube made of G10 material with high thermal insulation performance ensures thermal isolation between the room temperature part and the liquid helium low-temperature environment, further reduces the loss of liquid helium caused by heat conduction, effectively reduces the consumption loss of liquid helium, improves the use efficiency, and at the same time enhances the economy and sustainability of the experiment, reducing the cost of the cryogenic experiment.

[0005] The present invention provides a low temperature sample rod, comprising: A conduit, wherein the conduit is made of a composite material of the glass fiber and epoxy resin; a support member connected to an end of the conduit; The detection component comprises a PCB board and a low-temperature superconducting wire. The PCB board is fixed to the supporting component. The low-temperature superconducting wire is passed through the interior of the conduit and connected to the PCB board.

[0006] A low-temperature sample rod according to the present invention further comprises a connecting tube, through which the conduit is connected to the supporting component; The connecting pipe is a copper pipe, and the supporting component is a copper plate.

[0007] According to the low-temperature sample rod provided by the present invention, the end of the guide tube is inserted into the connecting tube, and the supporting component is inserted into the connecting tube.

[0008] According to a low-temperature sample holder provided by the present invention, the supporting component comprises: A first support plate, the first support plate being provided with the PCB board with a female connector, and the first support plate being connected to an end of the connecting tube; A second supporting plate, on which the PCB board with the pin header and the sample to be tested are arranged; A third support plate, wherein the first support plate is connected to the second support plate through the third support plate.

[0009] According to a low-temperature sample holder provided by the present invention, the first support plate, the third support plate and the second support plate are sequentially arranged along the axial direction of the conduit.

[0010] According to a low-temperature sample rod provided by the present invention, the conduit is provided with a first mounting hole; The connecting pipe is provided with a second mounting hole adapted to the first mounting hole; The first mounting hole and the second mounting hole are threadedly connected by a fastener.

[0011] According to a low-temperature sample rod provided by the present invention, the connecting tube is provided with a third mounting hole; The supporting component is provided with a fourth mounting hole adapted to the third mounting hole; The third mounting hole and the fourth mounting hole are threadedly connected via a fastener.

[0012] According to a low-temperature sample holder provided by the present invention, the first support plate, the third support plate and the second support plate are all connected through mounting holes and fastener threads.

[0013] According to a low-temperature sample rod provided by the present invention, the cross-sectional width of the low-temperature sample rod is less than or equal to 12.7 mm.

[0014] The present invention also provides a low-temperature measurement device for a liquid helium environment, comprising a signal detector and the low-temperature sample rod as described above, wherein the low-temperature superconducting wire is connected to the signal detector.

[0015] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The low-temperature sample rod provided by the present invention is mainly used for low-temperature measurement in a liquid helium (4.2K) environment. The low-temperature sample rod is mainly composed of a conduit, a support component and a detection component. The detection component is mainly composed of a PCB board and a low-temperature superconducting wire. The support component is used to support and fix the PCB board and the sample to be tested. The two ends of the conduit extending along its axial direction are respectively a first end and a second end. The low-temperature superconducting wire enters the conduit from the first end and extends along the conduit to the second end. The second end of the conduit is connected to the support component, and the low-temperature superconducting wire is connected to the PCB board on the support board at the second end.

[0016] The experimenter manipulates the catheter to drive the support component to move, and then synchronously drives the PCB board and the sample to be tested into the liquid helium tank, while the catheter remains in the room temperature space outside the liquid helium tank. The catheter, as the main structure of the low-temperature sample rod, is made of G10 material. G10 material is a composite material of glass fiber and epoxy resin. Compared with the sample rod made of stainless steel in the prior art, the low-temperature sample rod made of the catheter made of G10 material with high thermal insulation performance ensures the thermal isolation between the room temperature part and the liquid helium low-temperature environment, further reduces the loss of liquid helium caused by heat conduction, effectively reduces the consumption loss of liquid helium, improves the use efficiency, and at the same time enhances the economy and sustainability of the experiment, and reduces the cost of low-temperature experiments. Moreover, the catheter made of G10 material can achieve a lightweight effect under the same volume. Compared with the stainless steel sample rod, the low-temperature sample rod of the present invention is lighter and easier to operate, so as to achieve efficient use of liquid helium and a stable experimental environment.

[0017] The cryogenic sample rod provided by the present invention provides an innovative and practical solution for low-temperature measurement in a liquid helium environment. Its unique structural design and material selection not only reduce the consumption of liquid helium and the experimental cost, but also ensure the stability of the cryogenic environment and the accuracy and efficiency of the measurement. It has broad application prospects and important practical value in the field of low-temperature physics experiments.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic structural diagram of a guide tube, a connecting tube and a supporting component of a cryogenic sample rod provided in an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a connecting tube and a supporting component of a low-temperature sample rod provided in an embodiment of the present invention.

[0021] Reference numerals: 100, conduit; 110, first mounting hole; 200, support member; 210, first support plate; 211, fourth mounting hole; 212, fifth mounting hole; 220, second support plate; 221, eighth mounting hole; 230, third support plate; 231, sixth mounting hole; 232, seventh mounting hole; 300, connecting pipe; 310, second mounting hole; 320, third mounting hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] like Figure 1 to Figure 2 As shown, the low-temperature sample rod of the embodiment of the present invention includes a catheter 100, a supporting component 200 and a detection component. The catheter 100 is made of a composite material of glass fiber and epoxy resin; the supporting component 200 is connected to the end of the catheter 100; the detection component includes a PCB board and a low-temperature superconducting wire, the PCB board is fixed to the supporting component 200, and the low-temperature superconducting wire is passed through the catheter 100 and connected to the PCB board.

[0028] The cryogenic sample rod of the embodiment of the present invention is mainly used for low-temperature measurement in a liquid helium (4.2K) environment. The cryogenic sample rod is mainly composed of a conduit 100, a support component 200 and a detection component. The detection component is mainly composed of a PCB board and a low-temperature superconducting wire. The support component 200 is used to support and fix the PCB board and the sample to be tested. The two ends of the conduit 100 extending along its axial direction are respectively a first end and a second end. The low-temperature superconducting wire enters the conduit 100 from the first end and extends along the conduit 100 to the second end. The second end of the conduit 100 is connected to the support component 200, and the low-temperature superconducting wire is connected to the PCB board on the support board at the second end.

[0029] The experimenter manipulates the catheter 100 to drive the support component 200 to move, and then synchronously drives the PCB board and the sample to be tested into the liquid helium tank, while the catheter 100 remains in the room temperature space outside the liquid helium tank. The catheter 100, as the main structure of the low-temperature sample rod, is made of G10 material, which is a composite material of glass fiber and epoxy resin. Compared with the sample rod made of stainless steel in the prior art, the low-temperature sample rod of the catheter 100 made of G10 material with high thermal insulation performance ensures the thermal isolation between the room temperature part and the low-temperature environment of liquid helium, further reduces the loss of liquid helium caused by heat conduction, effectively reduces the consumption loss of liquid helium, improves the use efficiency, and at the same time enhances the economy and sustainability of the experiment, and reduces the cost of low-temperature experiments. Moreover, the catheter 100 made of G10 material can achieve a lightweight effect under the same volume. Compared with the stainless steel sample rod, the low-temperature sample rod of the present invention is lighter and easier to operate, so as to achieve efficient use of liquid helium and a stable experimental environment.

[0030] The cryogenic sample rod provided by the present invention provides an innovative and practical solution for low-temperature measurement in a liquid helium environment. Its unique structural design and material selection not only reduce the consumption of liquid helium and the experimental cost, but also ensure the stability of the cryogenic environment and the accuracy and efficiency of the measurement. It has broad application prospects and important practical value in the field of low-temperature physics experiments.

[0031] In this embodiment, G10 material is used as the main structural component. G10 is a composite material made of glass fiber and resin, which has excellent thermal insulation performance and mechanical strength. This feature enables the G10 conduit 100 at room temperature to effectively isolate the influence of room temperature on the low-temperature environment of liquid helium, avoiding the problem of temperature rise in the low-temperature environment caused by heat conduction, thereby ensuring the effective use of liquid helium and the accuracy of the experiment.

[0032] In this embodiment, the PCB board is the core of the low-temperature sample rod used in the measurement test. The PCB board is compactly designed and uses a pin-and-female connection method, which is convenient for taking the sample to be tested for testing each time. During the measurement process, the sample to be tested is in good contact with the PCB board, and it is connected to the phase-locked amplifier or bridge at the room temperature end through the low-temperature superconducting wire to measure the resistance value of the sample to be tested.

[0033] Low-temperature superconducting wires have a resistance close to zero at low temperatures, strong current carrying capacity and good mechanical properties. They can stably and efficiently transmit measurement data in low-temperature environments to room-temperature parts, ensuring the accuracy of the measurement system and further ensuring the accuracy of the measurement results. This structural design ensures measurement efficiency and accuracy in low-temperature environments. Low-temperature superconducting wires can use niobium-titanium superconducting wires.

[0034] According to an embodiment provided by the present invention, the cryogenic sample rod further includes a connecting tube 300 , through which the catheter 100 is connected to the supporting component 200 ; the connecting tube 300 is a copper tube, and the supporting component 200 is a copper plate.

[0035] In this embodiment, the low-temperature sample rod is mainly composed of a catheter 100, a connecting tube 300, a support component 200 and a detection component. The connecting tube 300 serves as a transition connection between the catheter 100 and the support component 200. The design of the connecting tube 300 facilitates the detachable connection between the catheter 100 and the support component 200, making the disassembly and assembly of the low-temperature sample rod more flexible and convenient.

[0036] The connecting tube 300 is made of copper tube, which can provide good thermal conductivity and mechanical support, so as to effectively transfer low temperature to the sample to ensure the accuracy and efficiency of resistance measurement. The supporting component 200 can be designed as a copper plate that can match the shape of the PCB board, which can provide good thermal conductivity and mechanical support, closely connect the PCB board and the low-temperature superconducting wire, and play the role of temperature conduction and maintaining structural stability.

[0037] In this embodiment, the low temperature sample rod combines the thermal insulation performance of the G10 material with the thermal conductivity of the copper plate, and can quickly transfer the low temperature to the sample. The copper tube as the connecting tube 300 has good thermal conductivity and mechanical support ability, which can quickly transfer the low temperature to the sample and improve the measurement efficiency. The copper plate as the supporting component 200 can tightly connect the PCB and looms, which can achieve temperature conduction and ensure structural stability, which is conducive to efficient and accurate measurement.

[0038] Compared with traditional cryogenic sample holders, the cryogenic sample holder of the present invention significantly reduces the cost while maintaining performance, making it an ideal choice for laboratories with limited budgets. The design of combining G10, copper tube and copper plate reduces the complexity of manufacturing and maintenance, and is convenient for user operation.

[0039] According to an embodiment provided by the present invention, the end of the catheter 100 is inserted into the connecting tube 300 , and the supporting component 200 is inserted into the connecting tube 300 .

[0040] In this embodiment, the inner diameter of the connecting tube 300 is larger than the outer diameter of the catheter 100, and the width of the supporting component 200 is smaller than the inner diameter of the connecting tube 300. The connection method between the connecting tube 300, the catheter 100 and the supporting part is simple, thereby saving the assembly time of the sample rod and simplifying the connection structure.

[0041] The catheter 100 and the connecting pipe 300 can be connected by threads, can be bonded by low-temperature glue, or can be plugged in and out by a snap-fit ​​slot.

[0042] According to an embodiment provided by the present invention, the support component 200 includes a first support plate 210, a second support plate 220 and a third support plate 230. The first support plate 210 is provided with a PCB board with a female connector, and the first support plate 210 is connected to the end of the connecting tube 300; the second support plate 220 is provided with a PCB board with a pin connector and a sample to be tested; the first support plate 210 is connected to the second support plate 220 through the third support plate 230.

[0043] In this embodiment, the support component 200 is mainly composed of a first support plate 210, a second support plate 220 and a third support plate 230. The first support plate 210 is used to fix a PCB board containing a female header, the second support plate 220 is used to fix a PCB board containing a pin header and a sample to be tested, and the third support plate 230 serves as a transition connector between the first support plate 210 and the second support plate 220 to fix the two support plates provided with PCB boards.

[0044] Moreover, the PCB board is installed on the front side of the first support plate 210 and the second support plate 220. There is a certain distance between the first support plate 210 and the second support plate 220. The third support plate 230 fills this distance. The two ends of the third support plate 230 are respectively connected to the back side of the first support plate 210 and the second support plate 220, which ensures the setting form of the pin and female headers of the PCB board and connects the PCB board into a whole.

[0045] According to an embodiment provided by the present invention, the first support plate 210 , the third support plate 230 and the second support plate 220 are sequentially arranged along the axial direction of the catheter 100 .

[0046] In this embodiment, the extension directions of the first support plate 210, the third support plate 230, and the second support plate 220 are in a straight line, that is, the axial direction of the catheter 100, and the sample to be tested is correctly installed on the PCB to ensure good contact between the sample to be tested and the PCB. In other embodiments, the relative positions and extension directions of the first support plate 210, the second support plate 220, and the third support plate 230 may be different, and they are adjusted according to the installation requirements of the PCB and the actual measurement needs.

[0047] According to an embodiment provided by the present invention, the catheter 100 is provided with a first mounting hole 110; the connecting pipe 300 is provided with a second mounting hole 310 adapted to the first mounting hole 110; the first mounting hole 110 and the second mounting hole 310 are threadedly connected by fasteners.

[0048] In this embodiment, a first mounting hole 110 is provided on the tube body of the second end of the catheter 100, and the first mounting hole 110 penetrates the tube wall perpendicular to the axial direction of the catheter 100. A second mounting hole 310 is provided on the tube wall of the connecting tube 300 sleeved on the outer side of the second end of the catheter 100, and the second mounting hole 310 penetrates the tube wall perpendicular to the axial direction of the connecting tube 300. The position of the second mounting hole 310 corresponds to the first mounting hole 110. An M2 screw is used as a fastener and is screwed into the second mounting hole 310 and the first mounting hole 110 in sequence from the outside to the inside, thereby connecting the catheter 100 to the connecting tube 300.

[0049] The conduit 100 and the connecting pipe 300 are connected by providing a threaded connection form of a mounting hole and a fastener, which further simplifies the structure and connection form of the conduit 100 and the connecting pipe 300, facilitates the disassembly and assembly operations, and improves the test efficiency.

[0050] According to an embodiment provided by the present invention, the connecting pipe 300 is provided with a third mounting hole 320; the supporting component 200 is provided with a fourth mounting hole 211 adapted to the third mounting hole 320; the third mounting hole 320 and the fourth mounting hole 211 are threadedly connected by fasteners.

[0051] In this embodiment, a third mounting hole 320 is provided on the tube body of the connecting tube 300 which is sleeved on the outside of the supporting component 200. The third mounting hole 320 penetrates the tube wall perpendicular to the axial direction of the catheter 100. A fourth mounting hole 211 is provided on the portion of the supporting component 200 which is sleeved on the inner side of the connecting tube 300. The fourth mounting hole 211 penetrates the supporting component 200. The position of the fourth mounting hole 211 corresponds to the third mounting hole 320. An M2 screw is used as a fastener and is screwed into the third mounting hole 320 and the fourth mounting hole 211 in sequence from the outside to the inside, thereby connecting the connecting tube 300 to the supporting component 200.

[0052] The connecting pipe 300 is connected to the supporting component 200 by providing a threaded connection form of a mounting hole and a fastener, which further simplifies the structure and connection form of the connecting pipe 300 and the supporting component 200, facilitates the disassembly and assembly operations, and improves the test efficiency.

[0053] According to an embodiment provided by the present invention, the first support plate 210, the third support plate 230 and the second support plate 220 are all connected by mounting holes and fastener threads.

[0054] In this embodiment, the first support plate 210, the third support plate 230 and the second support plate 220 are all threadedly connected through mounting holes and fasteners, that is, the fourth mounting hole 211 is set at one end of the first support plate 210 inserted into the inner side of the connecting tube 300, and the fifth mounting hole 212 penetrating the first support plate 210 is set at the other end of the first support plate 210. A sixth mounting hole 231 penetrating the third support plate 230 is set at one end of the third support plate 230, and the sixth mounting hole 231 and the fifth mounting hole 212 are screwed in sequence and connected by M2 screws as fasteners. The other end of the third support plate 230 is set at a seventh mounting hole 232 penetrating the third support plate 230, and one end of the second support plate 220 is set at an eighth mounting hole 221 penetrating the second support plate 220, and the seventh mounting hole 232 and the eighth mounting hole 221 are screwed in sequence and connected by M2 screws as fasteners.

[0055] The corresponding PCB board is also provided with mounting holes, and when the M2 screws are fastened and installed, they are first connected through the mounting holes on the PCB board and then through the mounting holes on the first support plate 210 or the second support plate 220. Therefore, when the fasteners are threadedly connected on the support component 200, the connection between the support plates and between the support plate and the connecting tube 300 is realized, and the PCB board is fixedly installed on the support plate at the same time.

[0056] The support plates are connected by providing mounting holes and threaded connections with fasteners, thereby further simplifying the structure and connection form of the support component 200, facilitating assembly and disassembly operations and improving test efficiency.

[0057] According to an embodiment provided by the present invention, the cross-sectional width of the low-temperature sample rod is less than or equal to 12.7 mm.

[0058] In this embodiment, the design of the cryogenic sample rod is adapted to the minimum caliber of the liquid helium tank of 12.7 mm, that is, the width of the cryogenic sample rod in the cross section perpendicular to its axial direction is required to be no greater than 12.7 mm, so that the cryogenic sample rod can be extended from the minimum opening of the liquid helium tank into the internal low-temperature environment for measurement, which effectively reduces the consumption of liquid helium and improves the economy and sustainability of the experiment. Compared with the traditional cryogenic sample rod, the structure of the cryogenic sample rod of the present invention allows it to be directly extended into the liquid helium storage tank for experiments, reducing the loss of liquid helium transfer, and the design adopts the minimum caliber of the liquid helium tank of 12.7 mm, which greatly reduces the consumption of liquid helium, improves the utilization efficiency, and saves liquid helium resources.

[0059] In this embodiment, the length of the first support plate 210 is 25.5 mm, the width is 10 mm, the diameters of the fourth mounting hole 211 and the fifth mounting hole 212 are 2.04 mm, the hole spacing between the fourth mounting hole 211 and the fifth mounting hole 212 is 12.58 mm, and the vertical distance between the fifth mounting hole 212 and the end wide side of the first support plate 210 where it is located is 3.42 mm. The length of the third support plate 230 is 24.5 mm, the width is 10 mm, the diameters of the sixth mounting hole 231 and the seventh mounting hole 232 are 2.04 mm, the hole spacing between the sixth mounting hole 231 and the seventh mounting hole 232 is 17.4 mm, and the vertical distance between the sixth mounting hole 231 and the end wide side of the third support plate 230 where it is located is 3.1 mm. The second support plate 220 has a length of 20 mm and a width of 10 mm, the diameter of the eighth mounting hole 221 is 2.04 mm, and the vertical distance between the eighth mounting hole 221 and the wide side of the end of the second support plate 220 where it is located is 2.82 mm. The connecting tube 300 has a length of 50 mm, an inner diameter of 10.2 mm, and an outer diameter of 10.5 mm, the apertures of the second mounting hole 310 and the third mounting hole 320 are 2.04 mm, and the vertical distance between the third mounting hole 320 and the end face of the connecting tube 300 where it is located is 9.49 mm.

[0060] The cryogenic measurement device for a liquid helium environment provided by the present invention is described below. The cryogenic measurement device for a liquid helium environment described below and the cryogenic sample rod described above can be referred to each other.

[0061] An embodiment of the present invention further provides a low-temperature measurement device for a liquid helium environment, comprising a signal detector and a low-temperature sample rod as in the above embodiment, wherein the low-temperature superconducting wire is connected to the signal detector.

[0062] In the low-temperature measurement device for a liquid helium environment of an embodiment of the present invention, the signal detector can adopt a phase-locked amplifier or a bridge. In the actual measurement process, the low-temperature sample rod transmits data to the room temperature part through a low-temperature superconducting wire, and is connected to the phase-locked amplifier or the bridge to ensure stable signal transmission and good contact between the sample and the PCB board. The low-temperature superconducting wire is connected to the phase-locked amplifier or the bridge at the room temperature end to measure the resistance value of the sample, thereby ensuring measurement efficiency and accuracy in a low-temperature environment.

[0063] When performing low-temperature resistance measurement, special attention should be paid to carefully handling the low-temperature sample rod to avoid the breakage of the low-temperature superconducting wires connecting the PCB board and the support component 200 due to improper operation. These low-temperature superconducting wires are the key to ensuring the accuracy of resistance measurement. Once damaged, they will directly affect the reliability of the measurement results. Therefore, when handling the low-temperature sample rod, appropriate tools should be used or protective gloves should be worn to ensure the accuracy and safety of the operation. At the same time, excessive force should be avoided on the sample rod in a low-temperature environment to prevent the material from becoming fragile due to temperature changes, thereby increasing the risk of damage.

[0064] Remind users to pay attention to safety issues in low temperature environments during use, such as preventing frostbite.

[0065] Provide maintenance methods for the sample rod, including regular inspection of the connection of each component, especially the connection between the low-temperature superconducting wire and the PCB board, to extend its service life.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low temperature sample holder, characterized in that: include: A conduit, wherein the conduit is made of a composite material of the glass fiber and epoxy resin; a support member connected to an end of the conduit; The detection component comprises a PCB board and a low-temperature superconducting wire. The PCB board is fixed to the supporting component. The low-temperature superconducting wire is passed through the interior of the conduit and connected to the PCB board.

2. The cryogenic sample holder according to claim 1, characterized in that: Also included is a connecting pipe, through which the conduit is connected to the supporting member; The connecting pipe is a copper pipe, and the supporting component is a copper plate.

3. The cryogenic sample holder according to claim 2, characterized in that: The end of the catheter is inserted into the connecting pipe, and the supporting component is inserted into the connecting pipe.

4. The cryogenic sample holder according to claim 2, characterized in that: The supporting member comprises: A first support plate, the first support plate being provided with the PCB board with a female connector, and the first support plate being connected to an end of the connecting tube; A second supporting plate, on which the PCB board with the pin header and the sample to be tested are arranged; A third support plate, wherein the first support plate is connected to the second support plate through the third support plate.

5. The cryogenic sample holder according to claim 4, characterized in that: The first support plate, the third support plate and the second support plate are sequentially arranged along the axial direction of the conduit.

6. The cryogenic sample holder according to claim 2, characterized in that: The conduit is provided with a first mounting hole; The connecting pipe is provided with a second mounting hole adapted to the first mounting hole; The first mounting hole and the second mounting hole are threadedly connected by a fastener.

7. The cryogenic sample holder according to claim 2, characterized in that: The connecting pipe is provided with a third mounting hole; The supporting component is provided with a fourth mounting hole adapted to the third mounting hole; The third mounting hole and the fourth mounting hole are threadedly connected via a fastener.

8. The cryogenic sample holder according to claim 4, characterized in that: The first support plate, the third support plate and the second support plate are all connected through mounting holes and fastener threads.

9. The cryogenic sample holder according to any one of claims 1 to 8, characterized in that: The cross-sectional width of the low-temperature sample rod is less than or equal to 12.7 mm.

10. A low temperature measurement device for liquid helium environment, characterized in that: It comprises a signal detector and the low-temperature sample rod according to any one of claims 1 to 9, wherein the low-temperature superconducting wire is connected to the signal detector.

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