HE-3-SOSV Helium-3 Cryostat

"Wet" system - Standard Sample Loading - Sample in Vacuum

The model HE-3-SOSV cryostat provides optical access to a He-3 cooled cold finger. It is designed for standard sample loading with the sample in vacuum. The sample is typically attached at the bottom of the He-3 pot in the cryostat vacuum space and optical windows are installed on the vacuum shroud and the radiation shields. The path for the light beam to the sample may be totally in vacuum (i.e. not through any cryogen), while it is more cost effective if a path of light beam through the cryogen is acceptable.

This He-3 cryostat includes the following components:

  • Charcoal absorption pump with heater and thermometer
  • 1 K pot with thermometer
  • He-3 pot with heater and thermometer
  • Permanently stored He-3 gas
  • Optical windows
  • High efficiency liquid helium cryostat
  • Operation test


  • Resistive and/or superconducting wires
  • Coaxial cables
  • Clear shots to IVC
  • 1 K cold plate
  • Computer controller motorized 1 K pot cryogenic needle valve
  • Rotating and/or linear motion sample holder
  • Automatic temperature controller
  • Operating temperature up to 300 K in full magnetic fields
  • High efficiency helium dewar
  • Superconducting magnet
  • Magnet support with high current leads
  • Magnet power supply
  • IVC tail for superconducting magnet
  • Low eddy current cold finger
  • Liquid nitrogen level probe
  • Liquid helium level probe
  • Digital cryogen monitor
  • Liquid helium transfer line
  • 1 K pot pumping station
  • Turbo pumping station

Performance Specification

Base temperature: 400 mK (typical, depending on the window size)
Holding time at base temperature: 24 hours (typical)
Operation temperature range: 0.30 K - 80 K (300 K optional)
Sample space: As required

Drawing of HE-3-SOSV Helium-3 Cryostat, Janis Research, ultra low temperature
Drawing of Model HE-3-SOSV Helium-3 Cryostat

HE-3-SOSV-S Special Cryostat for FTIR

"Wet" System

Standard sample loading, sample in vacuum for Fourier Transform Infra-Red (FTIR) experiments.

HE-3-SOSV Helium-3 Cryostat, Janis Research, Ultra Low Temperature
Model HE-3-SOSV Helium-3 Cryostat

Helpful Resources

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

Complete our Helium-3 System Inquiry Checklist.