Closed-cycle Cryostat - 4K 6.5K 10K 30K
The closed-cycle cryostat uses the G-M thermodynamic cycle principle to compress and expand helium. The compressor provides the high-pressure helium required during the cycle, which is transmitted to the cold head through a flexible metal helium pipeline. The compressed helium The gas expands and is cooled in the cold head, and the expanded low-pressure helium returns to the compressor to repeat the cycle.
The closed-cycle cryostat provided by Dexinmag is a variable temperature low-temperature platform based on GM refrigerators produced by domestic and foreign companies. When used with a high-precision temperature controller, it can accurately control the temperature of samples within the entire temperature range. Simple operation and low maintenance cost. It is mainly used for magnetic measurement, optical measurement, photoelectric reaction, light reflection, fluorescence and magnetoresistance tests in low temperature and vacuum environments.
The closed-cycle cryostat includes two stages of cooling. The first stage is used to cool the thermal radiation shield around the sample, and the second stage is used to cool the sample.
Features:
-
Suitable for electrical, optical and magnetic measurements in low temperature environments;
-
Compact structure, high cost performance, no refrigerant consumption at low temperatures, long maintenance-free period, strong scalability, and easy to use;
-
The sample is in a high vacuum environment or atmosphere;
-
Optical windows can be integrated and a variety of optional window materials are available;
-
A variety of gold-plated oxygen-free copper sample holders can meet the measurement needs of different experimental requirements, and the sample holders can be quickly replaced;
-
A silicon diode temperature sensor or Cernox temperature sensor (used in strong magnetic fields) is installed on the cold finger;
-
A variety of options can meet the measurement needs of different experiments.
Technical specification
-
Temperature Sensor: Silicon diode temperature sensor, iron rhodium temperature sensor, CernoxTM temperature sensor (suitable for magnetic fields);
-
Temperature stability: ±0.01K depends on DXTC-290 temperature controller;
-
Vacuum evacuation: No special requirements are KF25;
-
Experiment type: It can be used in optical and electrical experiments. Except for the pulse tube refrigerator, the other cold heads can be installed at any angle. In addition, when used in conjunction with a spectrometer, the cold head can be equipped with three-level shock absorption, and the sample vibration amount is less than 1 micron;
-
Number of windows: When conducting electrical experiments, there is no need to open windows. When conducting optical experiments, 1-5 windows can be used;
-
Window selection: Fused quartz, infrared silicon material, sapphire, zinc selenide, zinc sulfide, cadmium, hoofide, germanium, silicon, cadmium fluoride, mylar, kapton, wrinkle, etc., the size can be customized.
-
Integrated configuration: ①A set of vacuum cover; ②A temperature sensor and a temperature-controlled heater; ③A gold-plated oxygen-free copper sample holder; ④A vacuum suction port KF25; ⑤A release valve KF16; ⑥A 8pin Electrical vacuum connector, a temperature sensor and heater share a 6-core connector; ⑦Supporting compressor, cold head drive line, high-pressure nitrogen pipe and Toolkit; ⑧A set of standard cold head placement brackets.