CN219496437U - Multi-line test lofting table for cryostat and cryostat - Google Patents

Abstract

The utility model discloses a multi-line test sample stage for a cryostat and the cryostat, wherein the multi-line test sample stage comprises a support seat for conducting cold, a sample stage, a socket board and a pin board, wherein the socket board and the pin board are connected through pin sockets, through holes for conveniently placing samples are formed in the socket board and the pin board, and the pins and the sockets are made of conductive materials; the sample is connected with the contact pins through test wires, the socket is connected with the measuring device through wires, and each test wire is connected with different contact pins to carry out multi-wire testing. The utility model also discloses a cryostat using the multi-line test loft station. According to the utility model, the multi-line test can be performed by dividing each test line connected with the sample into different pins; the sample can be directly replaced without disassembling the mechanical structure of the sample placing table, and the test efficiency is improved.

Description

Multi-line test lofting table for cryostat and cryostat

Technical Field

The utility model relates to a low-temperature device, in particular to a multi-line test lofting table for a cryostat and the cryostat.

Background

The cryostat uses a cryogenic liquid or gas refrigerator to make a sample in a space where the temperature of the cryogenic liquid is constant or can be changed as needed, and can measure physical quantity of the sample, and is widely used in the fields of cryogenic superconductivity, electromagnetic testing, and the like. When the low-temperature property of the sample is measured, the sample-placing table needs to have good heat conduction and insulation property, meanwhile, the sample needs to be connected with enough measuring lines, so that the sample-placing table is tightly connected with a refrigerating system such as a cryostat, and the like, as shown in the figure 1, the measuring lines need to be directly led out from the pressed sample, and therefore, when the sample is replaced, mechanical fixing structures such as a pressing plate and the like need to be detached. In addition, the existing sample stage structure is not suitable for multi-line testing because the test space is small, and specific welding spots between the sample and the measuring line are not well distinguished.

Disclosure of Invention

The utility model aims to: it is an object of the present utility model to provide a rapidly removable multi-line test loft station for a cryostat, and another object of the present utility model is to provide a cryostat including a loft station as described above.

The technical scheme is as follows: the utility model relates to a multi-line test sample stage for a cryostat, which comprises a support seat for conducting cold, a sample stage, a socket board and a pin board, wherein the socket board and the pin board are connected through pin sockets, the socket board and the pin board are respectively provided with a through hole for conveniently placing a sample, and the pins and the sockets are made of conductive materials; the sample is connected with the contact pins through test wires, the socket is connected with the measuring device through wires, and each test wire is connected with different contact pins to carry out multi-wire testing.

Preferably, the sample stage is located between the socket board and the pin board, and a through hole for the pin to pass through is formed in the sample stage.

Preferably, the support seat is a three-stage step with a smaller surface area from bottom to top, and comprises a bottom table, a two-stage support table and a three-stage support table.

Further, the sample table is fixed on the three-stage supporting table through screws, and a heat-conducting and insulating film is arranged between the sample table and the sample.

Further, the socket board is located on a secondary support table.

Preferably, the pin plate and the socket plate are made of FR4 material.

The cryostat comprises a cold source, a cold guide structure, a cold screen and the multi-line test sample stage for the cryostat.

Preferably, the cold source is a refrigerator or liquid helium.

The beneficial effects are that: compared with the prior art, the utility model has the following advantages: 1. the multi-line test can be performed by dividing each test line connected with the sample into different pins; 2. the sample can be directly replaced without disassembling the mechanical structure of the sample placing table, so that the test efficiency is improved; 3. the sample is not in direct contact with the cold-conducting structure, avoiding conductive connection with the cold-conducting structure.

Drawings

FIG. 1 is a top view of a prior art loft station;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is an assembly view of the present utility model;

FIG. 4 is a schematic view of a structure of a support base;

FIG. 5 is an assembly view of a plug pin board and a receptacle board;

FIG. 6 is a schematic diagram of the structure of a sample stage;

FIG. 7 is a cryostat according to example 3;

fig. 8 is a cryostat according to example 4.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Example 1

The utility model relates to a multi-line test sample stage for a cryostat, which comprises a supporting seat 1 for conducting cold, a sample stage 3, a socket board 2 and a pin board 4 which are connected through pins 9 and sockets 8, wherein the socket board 2 and the pin board 4 are provided with through holes for placing samples, and the pins 9 and the sockets 8 are made of conductive materials; the sample is connected with the contact pin 9 through the test wire, and the socket 8 is connected with the measuring device through the wire, and each test wire is connected with different contact pins to carry out multi-line test.

The sample platform 3, the socket board 2 and the pin board 4 are all rectangular, and the sample platform 3 is smaller than the through openings formed in the socket board 2 and the pin board 4.

Example 2

This embodiment differs from embodiment 1 in that: the sample platform 3, the socket board 2 and the pin board 4 are rectangular boards with the same size, the sample platform 3 is positioned between the socket board 2 and the pin board 4, the sample platform 3 is provided with a through hole for the pin 9 to pass through, and the pin board and the socket board are made of FR4 materials. Preferably, the support base 1 is a three-stage step with a smaller surface area from bottom to top, and is composed of a bottom table 5, a two-stage support table 6 and a three-stage support table 7. The sample stage 3 is fixed on the three-stage support stage 7 through a screw 10, and a heat-conducting and insulating film 11 is arranged between the sample stage 3 and the sample, wherein the film can be made of sapphire.

The bottom table 5 is in direct contact with the cold source part, so that the cold energy of the cold source is guided to the secondary support table 6, and the whole structure of the sample table 3 is supported; the secondary support 6 directs the cooling energy obtained in the base table 5 to the tertiary support 7, optionally the socket plate 2 being attached to the upper surface of the secondary support 6 by adhesive or similar fastening; the three-stage support table 7 guides the obtained cooling capacity to the sample table 3 and the sample, and plays a limiting role on the installation of the socket plate 2. The sample table 3 guides the cooling capacity of the supporting seat 1 to the sample and plays a role in supporting and limiting the pin board 4; the screw 10 tightly fixes the sample stage 3 and the three-stage supporting stage 7, thereby fixing the relative positions of the sample stage 3 and the three-stage supporting stage, ensuring that the contact surfaces of the sample stage 3 and the three-stage supporting stage are in tight and good contact, and reducing the heat transfer resistance caused by the solid contact surfaces.

A plurality of pins 9 are fixed on the pin board 4 by gluing or other similar matching means, and a plurality of sockets 8 are fixed on the socket board 2 by gluing or other similar matching means; the contact pins 9 are matched with the sockets 8 one by one in a plugging manner, and the electric signals to be measured of the sample are led out to an external measuring device. The sample is connected with the contact pin 9 through the test wire, and socket 8 passes through wire connection measuring device, has a plurality of wire connectors on the measuring device, and during the test, can set up the power as required between two connectors, forms the return circuit, realizes the test. Each test line connected to the sample may be connected to a different pin for multi-line testing.

Example 3

The cryostat according to the utility model comprises a refrigerator, a cold-conducting structure, a cold screen and a multi-line test loft station for a cryostat according to example 1 or example 2.

As shown in fig. 7, the cryostat adopts a vertical installation mode, a sample stage is fixed on a secondary cold head of a refrigerator, the sample stage and the secondary cold head are placed in a cold screen for radiation protection together, and then the sample stage and the secondary cold head are placed in a vacuum cover together, so that heat leakage is reduced, and more cold energy is obtained by the sample stage at the same working temperature. In the experimental process, the heat conduction and insulation target from the cold head of the refrigerator to the sample is successfully realized, and the quick sample exchange of the sample platform is realized through the plug-in structure of the plug-in pin plate and the plug-in socket plate.

Example 4

The cryostat according to the utility model comprises liquid helium, a cold conducting structure, a cold screen and a multi-line test loft station for a cryostat according to example 1 or example 2.

As shown in fig. 8, the sample stage is placed at the bottom of the sample holder, which has an extended copper bar, and the cooling is provided by the liquid helium in the liquid helium dewar. The cold energy is transferred to the copper bar through the liquid helium Dewar, and then is conducted to the lofting table through the copper bar. In the sample changing process, quick sample changing is realized through the insertion and extraction of the insertion needle plate and the socket plate.

Example 3 and example 4 are cryostats using a multi-wire test loft station, and the loft station described in the present utility model can be applied to other cryogenic devices having thermal insulation and replacement requirements.

Claims (8)

1. The multi-line test sample stage for the cryostat is characterized by comprising a supporting seat (1) for conducting cold, a sample stage (3), a socket board (2) and a pin board (4) which are connected through pin sockets, wherein through holes for placing samples are formed in the socket board (2) and the pin board (4), and pins (9) and the socket (8) are made of conductive materials; the sample is connected with the contact pins (9) through test wires, the socket (8) is connected with the measuring device through wires, and each test wire is connected with different contact pins (9) for multi-wire testing.

2. The multi-line test sample stage according to claim 1, characterized in that the sample stage (3) is located between the socket board (2) and the pin board (4), and the sample stage (3) is provided with a through hole through which the pin (9) passes.

3. The multi-line test lofting station according to claim 1, wherein the support base (1) is a three-stage step with a reduced surface area from bottom to top, and is composed of a base table (5), a two-stage support table (6) and a three-stage support table (7).

4. A multi-wire test specimen stage according to claim 3, characterized in that the specimen stage (3) is fixed to the tertiary support stage (7) by means of screws (10), a thermally conductive and insulating film (11) being provided between the specimen stage (3) and the specimen.

5. The multi-wire test specimen stage according to claim 4 characterized in that the socket plate (2) is located on a secondary support stage (6).

6. The multi-wire test specimen stage according to claim 1, characterized in that the pin plate (4) and the socket plate (2) are made of FR4 material.

7. A cryostat comprising a cold source, a cold conducting structure, a cold screen and a multi-line test loft station for a cryostat according to any of claims 1 to 6.

8. The cryostat of claim 7, wherein the cold source is a refrigerator or liquid helium.