APPARATUS FOR TEMPERATURE CONTROL USING THE VIBRATING SAMPLE MAGNETOMETER

摘要

The present invention relates to a temperature control device used in a vibrating sample magnetometer, and more particularly, by cooling the sample holder in the vacuum vessel through a freezer instead of expensive liquid helium and equipped with a temperature sensor and a heater to adjust the temperature, Anyone can easily and simply change the temperature of the sample from 4 K to 325 K and use a beryllium copper tube as an inner tube attached to the cold head of the freezer to cool the sample. It has little effect on the flow and good heat transfer. By using the stainless steel tube which is shallow upward from the heater which is the upper part of the inner tube, the heat loss by heat transfer can be reduced and the lower part of the inner tube is oxygen free. By using copper tube, heat transfer is good and the existing liquid helium is There is no cost loss due to liquid helium consumption compared to the equipment used, and the vacuum vessel, the radiation shield and the inner tube are installed to minimize and maintain the sample temperature by maximizing the performance of the freezer. While blocking, it is possible to reduce the elements that impede the flow of magnetic flux from the sample, and to lower the temperature to 4 K simply by operating the switch of the helium compressor that operates the freezer, and precisely below 10 mK using the temperature control heater. While controlling the effect of the magnetic moment can be easily obtained by the temperature change.