A device and method for experimentally loading low-temperature samples using explosive magnetic quasi-isentropic loading

Abstract

The present invention discloses an explosive magnetic quasi-isentropic loading low-temperature sample experimental device and method thereof, belonging to the technical field of high-pressure physical explosive magnetic quasi-isentropic loading. The experimental device comprises: a sample target cavity is coaxially arranged in the explosive magnetic flux loading device, a low-temperature cold source fixed sealing plate is arranged on the explosive magnetic flux loading device for sealing; a refrigeration cold head is arranged above the explosive magnetic flux loading device and connected to the sample target cavity through a heat-conducting material; a vacuum cover is arranged above the refrigeration cold head. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device provided by the present invention adopts a refrigeration cold head as a sample target cavity cooling cold source design, which reduces the use of low-temperature working fluids at the experimental site, facilitates experimental heat capacity control and target temperature adjustment; the cold source and sample target are designed to be separated and connected by heat conduction, which facilitates sample target replacement and improves experimental efficiency; the refrigeration and target preparation are remotely controlled through pipelines and lines, thereby improving the operability and safety of the explosive magnetic flux quasi-isentropic loading low-temperature sample experiment carried out in the detonation site.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure physical explosive magnetic quasi-isentropic loading, and in particular to an explosive magnetic quasi-isentropic loading low-temperature sample experimental device and a method thereof. Background Art

[0002] In the dynamic high-pressure loading experiment, the initial temperature of the sample is one of the important parameters that affects the thermodynamic path of sample loading. By adjusting the initial temperature, the initial phase and density of the sample can also be adjusted. It is an important experimental technical means to obtain a wide range of high-pressure properties of the material. Especially for gas materials, such as hydrogen, helium, oxygen, nitrogen, etc., due to the low initial density at room temperature and pressure, it is difficult to achieve high pressure loading by the method of dynamic high-pressure loading of room-temperature gas. However, using a low-temperature sample target to liquefy or solidify it before loading, and greatly increasing the initial density of the sample is an important technical approach to broaden the research pressure range. Explosive magnetic quasi-isentropic loading is one of the important dynamic high-pressure loading experimental techniques. In principle, it has the advantages of high loading pressure (up to the order of TPa), low temperature rise (order of 1000K), and large sample size (cm 3 Based on the characteristics of the explosive magnetic quasi-isentropic loading gas and other low-density material low-temperature sample experimental equipment and methods, it has important practical value for the wide-range high-pressure physical property research of materials.

[0003] Existing explosive magnetic cryogenic sample devices use a cryogenic fluid (liquid nitrogen or liquid helium) as a refrigerant. Before the experiment, the cryogenic fluid is stored in a liquid storage container, and the sample chamber is cooled using the cryogenic fluid liquid or vapor. This type of cryogenic device relies on the consumption of the cryogenic fluid for refrigeration, directly venting the heated working fluid gas from the cooled sample into the atmosphere. This results in low system insulation efficiency and high fluid loss. To complete the experiment before the cryogenic fluid is depleted, the experiment progress is controlled by the cryogenic fluid consumption pattern, resulting in an inability to actively control the experimental implementation process and poor operability. A large amount of refrigerant is required at the explosion site before the experiment, requiring personnel to operate the cryogenic fluid and remove pipelines on-site before the detonation experiment, further complicating the experimental process and safety management. Using the volumetric capacity of the stored cryogenic fluid to control the experimental heat capacity results in poor compatibility with different sample materials and sizes, making it difficult to replace the experimental target sample. Furthermore, existing cryogenic devices using cryogenic fluid for cooling have poor sample temperature regulation capabilities, with the lowest temperature the device can reach being fixed, limiting the sample temperature adjustment range during the experiment. Summary of the Invention

[0004] The purpose of the present invention is to provide an explosive magnetic quasi-isentropic loading low-temperature sample experimental device and method thereof, so as to solve the problems of large loss, poor controllability and operability in existing explosive magnetic low-temperature sample devices using cryogenic working fluid (liquid nitrogen or liquid helium) as refrigerant, resulting in great difficulty in experimental process and safety management, and inconvenient replacement of sample loads. The present invention provides an initial liquid helium temperature zone experimental environment for explosive magnetic flux quasi-isentropic loading experimental samples, reduces the use of cryogenic working fluids at the experimental site, and realizes the advantages of easy replacement of experimental sample loads and easy control and adjustment of sample temperature, thereby achieving the purpose of remote target preparation and remote temperature increase and decrease active control during the detonation site experiment.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] The present invention provides an explosive magnetic quasi-isentropic loading low-temperature sample experimental device, comprising: a hollow explosive magnetic flux loading device, a sample target cavity and a sealed cooling mechanism; the sample target cavity is coaxially arranged in the explosive magnetic flux loading device;

[0007] The sealed cooling mechanism includes: a low-temperature cold source fixed sealing plate with a hole in the middle, a refrigeration cold head and a vacuum cover; the low-temperature cold source fixed sealing plate adapted to the end of the explosive magnetic flux loading device is arranged on the explosive magnetic flux loading device for sealing; the refrigeration cold head is arranged above the explosive magnetic flux loading device, and the end of the refrigeration cold head passes through the low-temperature cold source fixed sealing plate and extends into the explosive magnetic flux loading device and is connected to the sample target cavity through a heat-conducting material; the vacuum cover is arranged above the refrigeration cold head.

[0008] Furthermore, the explosive magnetic flux loading device includes: an explosive magnetic flux loaded explosive detonating network plate and an explosive magnetic flux loaded metal inner cylinder coaxially arranged from outside to inside; the hollow space formed by the explosive magnetic flux loaded explosive detonating network plate and the explosive magnetic flux loaded metal inner cylinder is filled with an explosive magnetic flux loaded explosive layer, and explosive magnetic flux loaded initial magnetic field coils are provided at both ends of the explosive magnetic flux loaded explosive layer.

[0009] Furthermore, a cold shield is provided along the outside of the refrigeration cold head.

[0010] Furthermore, the sample target cavity is connected to a sample gas cylinder via a sample gas path to provide a target sample.

[0011] Furthermore, the refrigeration cold head is connected to a compressor via a circulating refrigeration pipeline.

[0012] Furthermore, a detonation range pipeline adapter is provided on the circulating refrigeration pipeline.

[0013] Furthermore, the sample target cavity and the refrigeration cold head are both provided with thermometers, and the thermometers are connected to a temperature controller via a temperature monitoring route.

[0014] Furthermore, a temperature control route switch is provided on the temperature monitoring route.

[0015] Furthermore, a sample gas path sealing adapter is provided on the sample gas path.

[0016] The present invention also provides a method for experimentally loading a low-temperature sample with explosive magnetic quasi-isentropic loading, which is based on the above-mentioned experimental device for experimentally loading a low-temperature sample with explosive magnetic quasi-isentropic loading, and includes the following steps:

[0017] After installing the low-temperature cold source fixed sealing plate on the explosive magnetic flux loading device, install and connect the sample target cavity, cold screen and refrigeration cold head. After fixing the refrigeration cold head to the low-temperature cold source fixed sealing plate, install the vacuum cover. After completing the connection of the connecting pipes and connecting lines, complete the installation of the explosive magnetic flux compression detonation assembly, and complete the explosive magnetic quasi-isentropic loading of the low-temperature sample experiment through remote detonation.

[0018] The present invention has the following beneficial effects:

[0019] The explosive magnetic quasi-isentropic loading low-temperature sample experimental device provided by the present invention adopts a refrigeration cold head as a cooling source for the sample target cavity, thereby reducing the use of low-temperature working fluids at the experimental site, reducing the limitation on target temperature regulation by controlling the experimental heat capacity by using the volume capacity of the stored low-temperature working fluid, and improving the sample temperature regulation capability of the low-temperature device; the cooling source and the sample target are designed and prepared separately, and the cooling source and the sample target are connected by heat conduction, which can improve the compatibility of the experiment with different sample materials and sample size targets by replacing the experimental sample target cavity. The separation of the cooling source and the sample target facilitates the replacement of the sample target cavity, and is fixed to a non-metallic low-temperature cooling source fixed cover plate to prevent damage by electromagnetic force. Remote cooling and remote target preparation can be achieved during the detonation site experiment through pipeline and line control, thereby improving the operability and safety of the explosive magnetic flux quasi-isentropic loading low-temperature sample experiment.

[0020] The explosive magnetic quasi-isentropic loading low-temperature sample experimental device provided by the present invention is equipped with thermometers at the sample target cavity and the refrigeration cold head. The temperature changes are monitored by a temperature controller to achieve remote active temperature control, thereby improving the operability and safety of the explosive magnetic flux quasi-isentropic loading low-temperature sample experiment.

[0021] The explosive magnetic flux quasi-isentropic loading low-temperature sample experimental device provided by the present invention can be used for explosive magnetic flux quasi-isentropic compression loading of low-temperature solids, liquids, and gases, thereby improving the explosive magnetic flux quasi-isentropic loading experimental technical capabilities and having wider adaptability.

[0022] The explosion magnetic flux quasi-isentropic loading low-temperature sample experimental device provided by the present invention has a compact structure, is easy to operate and install, is easy to replace experimental samples, and is easy to control the sample temperature. In the detonation site experiment, it can remotely prepare targets and remotely control the temperature rise and fall actively, avoiding safety hazards in the equipment use and personnel operation process caused by target preparation at the detonation experiment site, and has high operability and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0024] Figure 1 This is a schematic structural diagram of Example 1 of the explosive magnetic quasi-isentropic loading low-temperature sample experimental device of the present invention;

[0025] Figure 2 This is a schematic structural diagram of an enlarged sample target area in Example 1 of the explosive magnetic quasi-isentropic loading low-temperature sample experimental device of the present invention;

[0026] Figure 3 This is a structural schematic diagram of Example 2 of the explosive magnetic quasi-isentropic loading low-temperature sample experimental device of the present invention.

[0027] In the figure: 100-explosion magnetic flux loading device, 101-explosion magnetic flux loading explosive initiation network board, 102-explosion magnetic flux loading metal inner cylinder, 103-explosion magnetic flux loading explosive layer, 104-explosion magnetic flux loading initial magnetic field coil, 2-sample target cavity, 3-low-temperature cold source fixed sealing plate, 4-refrigeration cold head, 5-vacuum cover, 6-cold shield, 7-sample gas path, 8-sample gas cylinder, 9-circulating refrigeration pipeline, 10-compressor, 11-detonation range pipeline adapter, 12-temperature monitoring route, 13-temperature controller, 14-temperature control route adapter, 15-sample gas path sealing adapter, 16-vacuum pipeline, 17-partition wall. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] Example 1

[0031] Please refer to Figure 1 and 2 The explosive magnetic quasi-isentropic loading low-temperature sample experimental device of this embodiment includes: an explosive magnetic flux loading device 100, a sample target cavity 2 and a sealed cooling mechanism.

[0032] The explosive flux loading device 100 has a hollow structure and includes an explosive flux loading explosive detonation network board 101 and an explosive flux loading metal inner cylinder 102. The explosive flux loading explosive detonation network board 101 and the explosive flux loading metal inner cylinder 102 are coaxially arranged from the outside to the inside. The inner wall of the explosive flux loading explosive detonation network board 101 and the outer wall of the explosive flux loading metal inner cylinder 102 form a hollow space. This hollow space is filled with an explosive flux loading explosive layer 103. Explosive flux loading initial magnetic field coils 104 are provided at both ends of the explosive flux loading explosive layer 103. The inner cylinder of the explosive flux loading device 100 has the ability to maintain a vacuum. Typically, the vacuum degree at room temperature and pressure must be less than 0.1 Pa. The explosive flux-loaded explosive detonation network board 101 and the explosive flux-loaded metal inner cylinder 102 can be cylindrical, square, or other special-shaped. The shapes of the explosive flux-loaded explosive detonation network board 101 and the explosive flux-loaded metal inner cylinder 102 can be changed and their internal structures can be modified according to different experimental types. Preferably, the explosive flux-loaded explosive detonation network board 101 and the explosive flux-loaded metal inner cylinder 102 are cylindrical. The cylindrical shape facilitates magnetic field constriction, making the explosive flux-loaded device 100 easier to install. The explosive flux-loaded initial magnetic field coil 104 can generate a preset initial magnetic field, which is parallel to the axis of the explosive flux-loaded explosive detonation network board 101 and the explosive flux-loaded metal inner cylinder 102. In other embodiments of the present invention, the magnetic field coil can also be replaced with a solenoid.

[0033] The sample target cavity 2 is coaxially arranged with the explosive magnetic flux loading device 100 and is located at the center of the axis of the explosive magnetic flux loading device 100 so that the sample target cavity 2 can be fully compressed. The shape of the sample target cavity 2 can be cylindrical, square, or other special-shaped cylindrical shapes. The shape of the sample target cavity 2 can be replaced and the internal structure can be changed according to different experimental types. The sample target cavity 2 can be a single-layer sleeve structure or a multi-layer coaxial sleeve structure. The sample target cavity 2 can change the number of layers of coaxial sleeve structure to suit different test types. The outermost tube of the sample target cavity 2 is usually made of a metal material with good electrical conductivity, such as copper, aluminum, etc., which is used to generate the inductive loading Lorentz force and reduce magnetic diffusion ablation during the explosive magnetic flux compression process. The sample target cavity 2 is used to load the sample target, and metal or non-metal samples can be pre-set. The sample can be in a solid, liquid, or gaseous state.

[0034] In one feasible embodiment, the sample target cavity 2 is connected to a sample gas cylinder 8 via a sample gas line 7 to provide the target sample. Upon entering the sample target cavity 2, the sample gas line 7 passes near the refrigeration cold head 4 to minimize heat leakage from the sample cavity. At the same time, it should not be too close to the refrigeration cold head 4 to prevent premature solidification and freezing of the gas, which could block the sample gas line 7. The sample gas line 7 can be selected based on the experiment. If the sample material is a gas at room temperature and pressure, a sample gas line 7 is required for gas supply and sample preparation. If a conventional metal material is used as the sample, no gas line is required.

[0035] The sealed cooling mechanism includes: a low-temperature cold source fixed sealing plate 3, a refrigeration cold head 4, a vacuum cover 5, and a cold shield 6.

[0036] The low-temperature cooling source fixed sealing plate 3 is compatible with the end of the explosive magnetic flux loading device 100 and is installed on the explosive magnetic flux loading device 100 to provide a vacuum seal. The base material of the low-temperature cooling source fixed sealing plate 3 is a dense non-metallic insulating material, which prevents metal components from being subjected to Lorentz forces during the magnetic flux compression process of the explosive magnetic flux loading device 100, thus achieving a good vacuum seal. A hole is provided in the center of the low-temperature cooling source fixed sealing plate 3 for the passage of the cold head 4, which also serves to secure the cold head 4. The position of this hole corresponds to the central axis of the explosive magnetic flux loading metal inner cylinder 102. The size and shape of the hole are compatible with the size and shape of the cold head 4, ensuring that the axis of the cold head 4, the centerline of the opening of the low-temperature cooling source fixed sealing plate 3, and the axis of the sample target cavity 2 are aligned vertically. The cold head 4 is connected to a compressor 10 via a circulating refrigeration line 9. The compressor 10 reduces the temperature of the cold head 4 by compressing the cooling medium for heat exchange.

[0037] The cooling head 4 is arranged above the explosive magnetic flux loading device 100, and the end of the cooling head 4 extends through the low-temperature cold source fixed sealing plate 3 into the explosive magnetic flux loading device 100, and the end of the cooling head 4 is connected to the sample target cavity 2 through a heat-conducting material. The cooling head 4 is located directly above the sample cavity and is used for heat conduction and cooling. The cooling head 4 is connected to a low-temperature cold source or a refrigerator. The shape of the cooling head 4 generally adopts a slender structure cold head, which is convenient for extending into the explosive magnetic flux loading device 100, achieving the effect of reducing the Lorentz force induced on metal parts in the magnetic field. Among them, the cooling head 4 connected to the refrigerator will induce the Lorentz force on the metal parts during the magnetic flux compression process of the explosive magnetic flux compression device. The electrical part of the cooling head is placed outside the explosive magnetic flux compression cavity to prevent premature damage to the cooling head during the experiment.

[0038] The vacuum cover 5 is arranged above the refrigeration cold head 4, and the end of the vacuum cover 5 is located at the low-temperature cold source fixed sealing plate 3, so that the refrigeration cold head 4 is completely covered in the vacuum cover 5. The vacuum cover 5 is connected to the compressor 10 through the vacuum pipeline 16, and the vacuum environment is maintained by the compressor 10.

[0039] In one feasible embodiment, a cold shield 6 is positioned along the exterior of the cold head 4 to reduce radiative heat leakage. The cold shield 6 encloses the portion of the cold head 4 that extends into the explosive magnetic flux loading device 100, but does not enclose the sample target cavity 2. The shape and size of the cold shield 6 are compatible with the cold head 4 and are typically cylindrical. In this embodiment of the present invention, the cold shield 6 is constructed from multiple pieces spliced ​​together along the circumference, or has elongated radial grooves cut along the circumference on a surface perpendicular to the magnetic field, thereby reducing the effect of the Lorentz force induced on metal components in the magnetic field.

[0040] In a feasible implementation scheme, both the sample target cavity 2 and the refrigeration cold head 4 are provided with thermometers (not indicated in the figure), and the thermometers are connected to the temperature controller 13 through a temperature monitoring route 12. The temperature monitoring route 12 includes two parallel lines, a temperature monitoring route and a temperature control route. The temperature controller 13 monitors temperature changes and performs timely control, thereby realizing remote active temperature rise and fall control, thereby improving the operability and safety of the explosive magnetic flux quasi-isentropic loading low-temperature sample experiment.

[0041] Example 2

[0042] Please refer to Figure 2 and 3 The explosive magnetic quasi-isentropic loading low-temperature sample experimental device of the embodiment is further improved based on Example 1.

[0043] Please refer to Figure 1In this embodiment, the explosive magnetic quasi-isentropic loading low-temperature sample experimental device is separated into an explosion target range and a control room by a partition wall 17. The explosive magnetic flux loading device 100, the sample target cavity 2 and the sealed cooling mechanism are arranged on the explosion target range. The description of the explosive magnetic flux loading device 100, the sample target cavity 2 and the sealed cooling mechanism is the same as that of Example 1. Compared with Example 1, the difference of this embodiment is that the compressor 10, the sample gas cylinder 8 and the temperature controller 13 are arranged in the control room.

[0044] In one feasible implementation, the refrigeration cold head 4 on the explosion range is connected to the compressor 10 in the control room via a circulating refrigeration line 9. A detonation range piping adapter 11 is installed on this circulating refrigeration line 9 and located on the side of the partition wall 17 near the control room. The detonation range piping adapter 11 is constructed of steel and has a steel valve installed on the control room side. The valve on the control room side is closed before the experiment begins. The detonation range side is protected by detonation shielding steel plates to prevent detonation products from entering the control room along the pipeline during the experiment.

[0045] In a feasible implementation scheme, the thermometers installed in the sample target cavity 2 and the cooling cold head 4 on the explosion target range are connected to the temperature controller 13 in the control room through a temperature monitoring route 12. A temperature control route adapter 14 is provided on the temperature monitoring route 12, and the temperature control route adapter 14 is provided on the side of the partition wall 17 close to the control room.

[0046] In one feasible embodiment, the sample target cavity 2 at the blasting range is connected to a sample gas cylinder 8 in the control room via a sample gas line 7. A sample gas line seal adapter 15 is provided on this sample gas line 7 and is located on the side of a partition wall 17 near the control room. A gas line shutoff valve is provided on the control room side of the sample gas line 7.

[0047] The partition wall 17 and the control of pipelines and lines are used to realize remote cooling and remote target making during the detonation site experiment, thereby improving the operability and safety of the explosion magnetic flux quasi-isentropic loading low-temperature sample experiment.

[0048] Example 3

[0049] The present embodiment provides a method for the experimental use of explosive magnetic quasi-isentropic loading of a cryogenic sample, which is based on the experimental apparatus for the explosive magnetic quasi-isentropic loading of a cryogenic sample in embodiment 1 or 2, and includes the following steps:

[0050] After installing the low-temperature cold source fixed sealing plate on the explosive magnetic flux loading device, install and connect the sample target cavity, cold screen and refrigeration cold head. After fixing the refrigeration cold head to the low-temperature cold source fixed sealing plate, install the vacuum cover. After completing the connection of the connecting pipes and connecting lines, complete the installation of the explosive magnetic flux compression detonation assembly, and complete the explosive magnetic quasi-isentropic loading of the low-temperature sample experiment through remote detonation.

[0051] The specific steps include:

[0052] (1) Installing the low-temperature cooling source fixed sealing plate on the explosion magnetic flux loading device;

[0053] (2) Install and connect the sample target cavity, cold shield and refrigeration cold head;

[0054] (3) The installed refrigeration cold head is connected and fixed to the low-temperature cold source fixed sealing plate;

[0055] (4) placing the vacuum cover on the refrigeration cold head and connecting and fixing it to the low-temperature cold source fixed sealing plate;

[0056] (5) Connect the circulating refrigeration pipeline, detonation range pipeline adapter, compressor, sample gas line, vacuum pipeline, and temperature monitoring line;

[0057] (6) Complete the installation of the explosive flux compression device detonation assembly;

[0058] (7) Personnel evacuate the detonation range to the control area and close the detonation range door;

[0059] (8) Check the power supply of the control circuit, perform sample target cavity cooling, sample cavity gasification and target preparation, and temperature control;

[0060] (9) When the predetermined target production requirements are met, cut off the sample gas line and close the detonation range pipeline transfer valve;

[0061] (10) The detonation completed the quasi-isentropic loading experiment of the low-temperature sample.

[0062] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quasi-isentropic loading low-temperature sample experimental device for explosive magnetic field, characterized in that: include: A hollow explosive magnetic flux loading device (100), a sample target cavity (2) and a sealed cooling mechanism; The sample target cavity (2) is coaxially arranged in the explosive magnetic flux loading device (100); The sealed cooling mechanism comprises: a low-temperature cold source fixed sealing plate (3) with a hole in the middle, a refrigeration cold head (4) and a vacuum cover (5); the low-temperature cold source fixed sealing plate (3) adapted to the end of the explosive magnetic flux loading device (100) is arranged on the explosive magnetic flux loading device (100) for sealing; the refrigeration cold head (4) is arranged above the explosive magnetic flux loading device (100), and the end of the refrigeration cold head (4) passes through the low-temperature cold source fixed sealing plate (3) and extends into the explosive magnetic flux loading device (100) and is connected to the sample target cavity (2) through a heat-conducting material; the vacuum cover (5) is arranged above the refrigeration cold head (4).

2. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 1 is characterized in that: The explosive magnetic flux loading device (100) comprises: an explosive magnetic flux loading explosive initiation network plate (101) and an explosive magnetic flux loading metal inner cylinder (102) coaxially arranged from outside to inside; a hollow space formed by the explosive magnetic flux loading explosive initiation network plate (101) and the explosive magnetic flux loading metal inner cylinder (102) is filled with an explosive magnetic flux loading explosive layer (103), and explosive magnetic flux loading initial magnetic field coils (104) are provided at both ends of the explosive magnetic flux loading explosive layer (103).

3. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 1, characterized in that: A cold screen (6) is provided along the outside of the refrigeration cold head (4).

4. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 1, characterized in that: The sample target cavity (2) is connected to a sample gas cylinder (8) via a sample gas path (7) to provide a target sample.

5. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 1, characterized in that: The refrigeration cold head (4) is connected to a compressor (10) via a circulating refrigeration pipeline (9).

6. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 5, characterized in that: The circulating refrigeration pipeline (9) is provided with a detonation range pipeline adapter (11).

7. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 1, characterized in that: The sample target cavity (2) and the refrigeration cold head (4) are both provided with thermometers, and the thermometers are connected to a temperature controller (13) via a temperature monitoring route (12).

8. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 7, characterized in that: A temperature monitoring route switch (14) is provided on the temperature monitoring route (12).

9. The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to claim 4, characterized in that: The sample gas path (7) is provided with a sample gas path sealing adapter (15).

10. A method for quasi-isentropic loading of low-temperature samples by explosive magnetic field, characterized in that: The explosive magnetic quasi-isentropic loading low-temperature sample experimental device according to any one of claims 1 to 9 comprises the following steps: After installing the low-temperature cold source fixed sealing plate on the explosive magnetic flux loading device, install and connect the sample target cavity, cold screen and refrigeration cold head. After fixing the refrigeration cold head to the low-temperature cold source fixed sealing plate, install the vacuum cover. After completing the connection of the connecting pipes and connecting lines, complete the installation of the explosive magnetic flux compression detonation assembly, and complete the explosive magnetic quasi-isentropic loading of the low-temperature sample experiment through remote detonation.

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