HE-3-TLSL Cryostat - Top Sample Loading, Sample in Liquid


Click button below to enlarge view of HE-3-TLSL top loading helium-3 cryostat, Janis Research, ultra low temperature

The model HE-3-TLSL cryostat is a top loading system that is designed for fast sample exchange. The sample is located in liquid.






Standard Configuration

The model HE-3-TLSL cryostat is a top loading system that is designed for fast sample exchange. The design allows the sample to be removed and introduced directly into the He-3 pot while the cryostat is cold. The system includes a sample probe and a load-lock with gate valve, plus an external gas handling system for safe insertion and removal of the sample in and out of the He-3 chamber.

Click button below to enlarge top view of HE-3-TLSL top loading helium-3 cryostat from Janis Research, ultra low temperatureEnlarge

Top View of HE-3-TLSL Top Loading Cryostat

Click button below to enlarge view of mechanical drawing of HE-3-TLSL top loading, sample in liquid cryostat, ultra low temperature, helium-3 systems, janis researchEnlarge

He-3-TLSL Cryostat Mechanical Drawing

This He-3 cryostat includes the following components:

  • Charcoal sorption pump with heater and thermometer
  • 1 K pot with thermometer
  • He-3 pot (sample chamber)
  • Load-lock
  • Sample probe with thermal anchor stage, thermometer, and heater
  • IVC can
  • External gas handling system with stored He-3 gas
  • External sorption cryo-pump
  • Operation test


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

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Performance Specification:
Base temperature: 300 mK
Holding time at base temperature: 24 hours (typical)
Operation temperature range: 0.3 K - 80 K (300 K optional)
Sample space: 0.5" - 1.5"

Other Configurations

Click image to see information on Top Loading 3He-VTI system in a 31 Tesla magnet at NHMFL-Tallahassee, HE-3-TLSLcClick image to see information on Quantum oscillations in alpha-Uranium in 31 Tesla magnet system, NHMFL, He-3-TLSL

Top-loading He-3 Cryostat and Variable Temperature Insert Designed to Fit 32 mm Room Temperature Bore Magnet
Janis Research Company is proud to announce the development of a top-loading He-3 cryostat with sample in He-3 liquid, as well as a variable temperature insert with sample in He-4 vapor. These cryostats were designed to fit a 32mm room temperature bore magnet at the National High Magnetic Field Laboratory (NHMFL) in Tallahassee, Florida, with a maximum sample space of 17mm.

NHMFL scientists have used these cryostats to study the Fermi surface of alpha-Uranium via quantum oscillations. The shape of the Fermi surface can be reconstructed by measuring the deHaas-vanAlphen oscillations in the magnetization as the field is swept over the sample. These oscillations were measured as a function of angle of the applied field and temperature. Measuring the temperature dependence of the oscillations can determine the effective masses of the electrons, which is a measure of the level of interaction the electrons have with each other and the crystal lattice.

Click image to enlarge view of Model 8TM-TLSL-He3-17 Helium-3 high field superconducting magnet system from Janis Research

Model 8TM-TLSL-HE3-17 He-3 High Field Magnet System

Click image to enlarge view of HE-3-TLSL for Nanoscale Studies from Janis Research

HE-3-TLSL for Nanoscale Studies

Click image to enlarge view of HE-3-TLSL-NMR helium-3 cryostat for NMR experiments, Janis Research, ultra low temperature, cryogenics

HE-3-TLSL-NMR for NMR Experiments


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