HE-3-TLSL Helium-3 Cryostat

"Wet" System - Top Sample Loading - Sample in Liquid

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

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

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"

Drawing of HE-3-TLSL Helium-3 Cryostat with Superconducting Magnet, Janis Research, ultra low temperature
Drawing of Model HE-3-TLSL Helium-3 Cryostat with Superconducting Magnet

Special HE-3-TLSL 3He/VTI system in a 31 Tesla magnet

Top-loading Helium-3 Cryostat and Variable Temperature Insert

JanisULT 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.


Helium-3 High Field Magnet System

HE-3-TLSL for Nanoscale Studies

Helium-3 Cryostat for Nuclear Magnetic Resonance (NMR) Spectroscopy

"Wet" System - top sample loading, sample in liquid
Model HE-3-TLSL helium-3 cryostat with gas handling system, ref. 11101, Janis Research, ultra low temperature
Model HE-3-TLSL Helium-3 Cryostat with Gas Handling System
Top view of Model HE-3-TLSL Helium-3 Cryostat, ref. 11101, Janis Research, ultra low temperature
Top View of Model HE-3-TLSL Helium-3 Cryostat

Gas Handling System

Gas handling system (GHS) designed to operate models HE-3-TLSL and HE-3-TLOSL Helium-3 cryostats.

Helpful Resources

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

Complete our Helium-3 System Inquiry Checklist.