Liquid Helium Cryostat

Ultra-Low Vibration Dry Liquid Helium Optical Cryostat System
Gas-conduction vibration isolation, nanoscale mechanical stability

Minimum 4.2K | Vibration at sample ≤50nm | Optional high-temperature stage up to 800K

The Liquid Helium Cryostat is an ultra-low vibration dry liquid helium optical cryostat system independently developed by ZEPTOOLS. It adopts a gas-conduction vibration isolation design and is installed on an optical vibration isolation platform, providing nanoscale mechanical stability for the sample stage and effectively reducing the impact of environmental vibration on measurements.

The system uses helium gas exchange to cool the sample. The cold head is supported by an adjustable bracket, which ensures structural stability while allowing flexible height adjustment. The main structure includes the refrigerator system, vacuum shroud, radiation shield, and sample holder. By configuring different types of vacuum pumps and related equipment, it can meet the sample cooling requirements of numerous low-temperature experiments; it can also be equipped with a nanoscale-precision three-dimensional positioning device (including for ultra-high vacuum environments), satisfying the observation needs of various samples.

Main Technical Specifications

Comparison of two refrigerator systems, flexible selection according to requirements

Parameter	KDE401SA Refrigerator System	KDE415SA Refrigerator System
Temperature range (no load)	5~300K	4.2~300K
Cooling time	5h (room temperature to 5K)	3.5h (room temperature to 5K)
Refrigerator cooling capacity	0.25W @ 4.2K	1.5W @ 4.2K
Vibration at sample	<±50nm @ 1Hz	<±50nm @ 1Hz
Static power consumption	3.2kW	6.5kW