HE-3-SOSV Helium-3 Cryostat for FTIR

"Wet" System - Standard Sample Loading - Sample in Vacuum - Optical - For FTIR experiments

The model HE-3-SOSV-S is a special optical cryostat. Optical windows with typical clear view size of 0.5" are installed on the vacuum shroud, as well as both the liquid nitrogen and liquid helium temperature radiation shields.

A special sample positioner with rotary/linear motion manipulator is installed at the top of the sample positioner so that the sample can be moved up and down, as well as rotated. OFHC copper braids are employed to provide the flexibilities of motion and rotation. A double optical sample holder is installed at the bottom of the sample positioner for reference and sample measurements.

This He-3 cryostat includes the following components:

  • Highly efficient liquid nitrogen shielded helium dewar
  • Liquid nitrogen temperature radiation with optical windows
  • Liquid helium temperature radiation with optical windows
  • 1 K radiation shield
  • Charcoal sorption pumps with heaters and thermometers
  • 1 K pots with thermometers
  • He-3 pots with heaters and thermometers
  • He-3 gas
  • Sample probe with rotary/linear motion manipulator
  • Sample mount with heater and thermometer
  • Operation test


  • Resistive wires
  • Coaxial cables
  • Automatic temperature controller
  • Helium level sensor and read out
  • Liquid helium transfer line
  • 1 K pot pumping station
  • High vacuum pumping station


Performance specification with two sets of 0.25" clear view quartz windows installed:
Sample Mount Base Temperature:less than 350 mK
Holding Time at Base Temperature:24 hours minimum
Operation Temperature Range:0.35 K - 300 K
Typical Sample Space:1.5"
Sample Z-motion:± 0.5"
Sample Rotation:± 90 degree


"Wet" System

Optical, Standard sample loading, sample in vacuum

HE-3-SOSV helium-3 cryostat, Janis Research, ultra low temperature
Model HE-3-SOSV Helium-3 Cryostat
HE-3-SOSV-S Helium-3 Cryostat for FTIR experiments, Janis Research, ultra low temperature, fourier transform infra-red
Model HE-3-SOSV-S Helium-3 Cryostat for FTIR Experiments

Helpful Resources

Importance of Ultra Low Temperature Research - an interview with Dr. Zuyu Zhao

Complete our Helium-3 System Inquiry Checklist.