Liquid Nitrogen Cryostat - Optics

Working principle

The low-pressure refrigerant is introduced into the cryostat from the liquid inlet, and then introduced into the evaporator at the bottom of the cryostat through the capillary tube inside the cryostat. A heater and a temperature sensor are also installed on the evaporator of the cryostat. , the steam whose temperature is controlled by the temperature controller is sprayed into the sample chamber. After cooling the sample, the steam is discharged through the air outlet pipe into the atmosphere or into a gas recovery device. In the design of this type of cryostat, in order to facilitate customers to easily load samples, the sample can be loaded from the top of the cryostat through the sample rod. The bottom of the cryostat uses a compact design with a vacuum cover. has a smaller duty cycle and is more suitable for measurements in magnetic fields.

Features:

◆ Temperature range (65K~500K), (optional 700K), high efficiency and fast cooling speed;
◆ The sample is in the vacuum chamber, providing an ideal and stable experimental environment;
◆ The vacuum interlayer is equipped with low-temperature adsorbent, which can increase the vacuum holding time and extend the use time of liquid nitrogen;
◆ The temperature sensor uses PT100 platinum resistor with good stability and repeatability;
◆ Multiple options to meet different testing needs;
◆ It is convenient to add liquid nitrogen during use;
◆ The optical sample holder can be equipped with a pluggable sample card and easy-to-use and beautiful binding posts;
◆ Can be customized according to customer requirements;
◆ Comes with 8 measuring leads as standard, which can be expanded to 32;
◆ The window comes standard with 2 fused quartz windows, which can be expanded to 5, and the window material can be changed according to user requirements;
◆ Changing samples is quick and convenient, and can be completed within 5 minutes;
◆ The sample holder is available as liquid sample holder, dust sample holder, solid sample holder, and block sample holder.

Technical specifications

Sample holder options:

Remark:
 
1: All standard optical cryostats are shipped from the factory with only one sample holder.
2: If the above standard sample holder cannot meet customer needs, it can be customized according to customer requirements.
3: In order to fix the optical performance sample, all optical cryostats are equipped with a pressing plate to hold the sample. The aperture of the pressing plate is consistent with the size of the light hole.

Cryostat Optical connector options:

Remark:

1: When all cryostats leave the factory, they are equipped with two connectors. One is for the installation of temperature sensors and heaters, and the other is a connector prepared for other performance measurements. When more test lines are needed, you will need Add mounting holes or install one or more Breakout Boxes;
2: There is the DXT91-S option in the above table. The wiring board and the shell of this option are integrally connected to the ground. The other is the DXT91-PTEF option. This option uses PTFE board insulation in the shell and the installed connector. The electrical properties of the housing and connector are independent of each other. This issue should be paid attention to when selecting.
3: Pressure reduction accessory options. The standard cryostat itself does not come with special pressure reduction spare parts. When a low temperature of 65K is required, corresponding pressure reduction accessories need to be configured.