Ultra High Vacuum (UHV)
Cryostat for Microscopy

Janis Research Company is pleased to introduce the latest design in our popular ST-500 cryostat line – the ST-500-UHV cryostat for microscopy with UHV sample environment.  This cryostat combines the already proven ultra-low vibration and thermal drift of the standard ST-500 microscope cryostat with UHV-compatible design features.  This continuous flow cryostat includes the same heat exchanger design as the standard ST-500 resulting in a low thermal drift of ~2 nm/minute.  It also has the same low base temperature (3.8 K) and helium consumption (~1.1 liters/hour) as the standard ST-500.

Fully bakeable to 175 °C (~450 K), this cryostat is true-UHV and is equipped with a viewport configured for short working distance measurements.  Different window materials are available to suit the required transmission range.  Depending on the window thickness, the working distance can be as short as 1 mm.  Like the standard ST-500, this versatile design can be modified to accept internal nano-positioning stages for x-y-z motion.  Systems incorporating nano-positioning stages utilize flexible UHV copper thermal braids for sample cooling.  The cryostat can also be configured for reflection or transmission measurements, and includes electrical feedthroughs allowing a range of electrical measurements to be performed.  The ST-500-UHV can be used with liquid helium or liquid nitrogen, and will operate in any orientation.  Janis can supply a complete turn-key package, including temperature controller and pumping station.

Contact Janis today to see how the ST-500-UHV can be tailored to meet your specific experimental needs.