HE-3-SSV Helium-3 Cryostat

"Wet" system - Standard loading - Sample in vacuum

The model HE-3-SSV insert is designed for standard sample loading with the sample in vacuum. The sample is typically attached at the bottom of the He-3 pot inside the inner vacuum chamber (IVC) can for cooling. The system design minimizes the intrinsic heat leak to the He-3 pot and optimizes the performance, resulting in a cost effective He-3 cryostat that is extremely reliable and easy to operate.

With JanisULT's superior design, the He-3 insert can be operated with the 1 K pot pump turned off after it reaches the base temperature. In this case the system will be extremely quiet, which is highly desirable for many applications. This unique feature also reduces the liquid helium consumption and makes the operation more cost effective.

This He-3 insert includes the following components:

  • Charcoal sorption pump with heater and thermometer
  • 1 K pot with thermometer
  • He-3 pot with heater and thermometer
  • Permanently stored He-3 gas
  • IVC can
  • Operation test


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

Performance Specification:

Pumping the 1 K pot
Base temperature: 300 mK
Hold time at base temperature: 120 hours

Stop pumping the 1 K pot after the base temperature is reached
Base temperature: 320 mK
Hold time at base temperature: 40 hours

Operation temperature range: 0.3 K - 80 K (300 K optional)
Sample space: As required

HE-3-SSV Helium-3 Cryostat, Janis Research, ultra low temperature
Drawing of Model HE-3-SSV Helium-3 Cryostat
Typical Performance Chart of He-3-SSV helium-3 cryostat, Janis Research, ultra low temperature
Typical Performance Chart of Model HE-3- SSV Helium-3 Cryostat


Cryogen-free Cryostat, Standard Sample Loading, Sample in Vacuum

HE-3-SSV-PT-2 cryogen free helium-3 cryostat, ref. 17028, Janis Research
Model HE-3-SSV-PT-2 Cryogen Free Helium-3 Cryostat


Continous Flow Cryostat, Standard Sample Loading, Sample in Vacuum

HE-3-SSV-CF Continuous Flow Helium-3 cryostat, Janis Research, ultra low temperature
Model HE-3-SSV-CF Continuous Flow Helium-3 Cryostat
HE-3-SSV helium-3 cryostat, Janis Research, ultra low temperature
Model HE-3-SSV Helium-3 Cryostat

Helpful Resources

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

Complete our Helium-3 System Inquiry Checklist.