Low-vibration and low-temperature magnetic field measurement device based on GM refrigerator cooling

Abstract

The invention discloses a low-vibration and low-temperature magnetic field measurement device based on GM refrigerator cooling. The device is characterized by comprising a refrigerator cavity (6) withone refrigerating cavity gas inlet (30) and a refrigerating cavity liquid outlet (9) and one matched GM refrigerator (4), wherein the cold head of the GM refrigerator (4) is inserted into the refrigerator cavity (6), and the GM refrigerator (4) is connected with the upper edge of the refrigerator cavity (6) through a damping bellows (5) and is fixed on a support beam (56) through a refrigerator damper (53). The device can effectively reduce influence of vibration of the GM refrigerator on sample testing; and a sample testing cavity is connected with a low-temperature superconducting magnet through thermal-insulating rigid connection, a sample testing rod is connected with the sample testing cavity through a cavity flange, relative motion between a sample and the low-temperature superconducting magnet is avoided, and influences of vibration on testing are avoided.

Description

technical field [0001] The invention relates to the technical field of temperature regulation in cryostats and superconducting magnets, in particular to a low-vibration low-temperature magnetic field measurement device based on GM refrigerator cooling that can measure relevant property parameters of samples in a low-temperature magnetic field environment. Background technique [0002] There are superconducting magnet cryostats available for temperature scanning and magnetic field scanning, and such cryostats can be used to measure physical parameters of samples. Such cryostats typically include a vacuum enclosure, multi-stage thermal radiation shields, a cryocooler, helium refrigerant tubes, superconducting magnets, a sample space, and devices for controlling temperature and magnetic fields. [0003] A common example of use for this type of cryostat is a variable temperature control that automates physical property measurements. For testing, the magnetic field strength in t...

AI Technical Summary

Problems solved by technology

An optional magnet cooling method for this type of cryostat is direct cooling of the refrigerator. This cooling method has the advantage of small cooling loss, but there is a problem that the magnet is greatly affected by the state of the cold head, and the system temperature adjustment is limited. Quench

A common configuration for this type of cryostat is that the refrigerator is rigidly attached to the vacuum enclosure and the heat radiation shield; this configuration is simple and reliable, but the vibration of the refrigerator has a great influence on the sample test under the magnetic field environmental test conditions

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