HE-3-SVC Helium-3 Cryostat

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

The model HE-3-SVC cryostat is a compact He-3 unit designed for experiments that cannot accommodate the larger height of the standard units. It is ideal for installation on an optical table and is typically used for detector cooling to He-3 temperatures. The sample or detector is attached at the bottom of the He-3 pot inside the vacuum jacket of the cryostat, and the system is often supplied with a window that provides optical access to the He-3 cold finger. The cryostat includes a superinsulated, liquid nitrogen shielded helium reservoir designed for long hold times, consistent with the size of the unit. The He-3 gas is permanently contained in a storage volume attached to the outer jacket of the unit.

This He-3 cryostat 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
  • Janis special CNDT liquid nitrogen shielded helium dewar
  • Liquid nitrogen level probe
  • Liquid helium level probe
  • Digital cryogen level monitor
  • Operation test


  • Resistive and/or superconducting wires
  • Coaxial cables
  • Fiber optics
  • 1 K cold plate
  • Computer controller motorized 1 K pot cryogenic needle valve
  • Rotating sample holder
  • Automatic temperature controller
  • Liquid helium transfer line
  • 1 K pot pumping station
  • Turbo pumping station

Performance Specifications

Base temperature: 300 mK
Hold time at base temperature: 72 hours

Stop pumping the 1 K pot after the base temperature is reached
Base temperature: 340 mK
Hold time at base temperature: 40 hours
Operation temperature range: 0.3 K - 300 K
Sample space: As required

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

Helpful Resources

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

Complete our Helium-3 System Inquiry Checklist.