Low-temperature sample support

Abstract

The invention provides a low-temperature sample support. The low-temperature sample support is positioned in a vacuum cavity and at least comprises an electric movement mechanism, a refrigerating device and a three-dimensional moving device, wherein the electric movement mechanism is used for enabling a sample to move relative to the refrigerating device under the driving of electricity; the refrigerating device is used for achieving a low temperature of the sample; and the three-dimensional moving device is used for achieving three-dimensional movement of the refrigerating device and the electric movement mechanism relative to the vacuum cavity. According to the low-temperature sample support in the invention, the sample is electrically driven to move relative to the vacuum cavity, the low temperature of the sample is realized, and heat conduction between the electric movement mechanism and an external room temperature environment is achieved only by a heat conduction channel formed by an alloy wire, so the heat conductivity of the heat conduction channel between a low-temperature part and the external room temperature environment is effectively reduced; and therefore, lower sample temperature, lower vacuum leakage risks and more compact and smaller structure can be realized.

Description

technical field [0001] The invention relates to the field of cryogenic refrigeration, in particular to a low-temperature sample holder. Background technique [0002] Low temperature is an important physical environment, which is of great significance to scientific research and application. The current vacuum low-temperature sample holder uses a mechanical transmission device to connect with the motion control unit at room temperature outside the vacuum chamber to complete the rotation of the sample and uses differentially pumped rotary seals (DPRS, Differentially pumped rotary seals) to realize the relative vacuum of the sample holder. overall rotation. Such a design has two disadvantages. One, the device is huge and complex, and there is a danger of vacuum leakage. Second, due to the mechanical transmission device, there is a heat transfer channel with a large thermal conductivity between the internal low-temperature components of the vacuum chamber and the external high...

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Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a low-temperature sample holder, which is used to solve the problem of large and complex devices in the prior art, the danger of vacuum leakage, and the gap between the internal low-temperature components and the external room temperature environment. The heat transfer channel with a large thermal conductivity is not easy to achieve a lower sample temperature

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