Janis Research, cryogenics, cryostats

3HELIUM SYSTEMS

Model HE-3-SSV-CF Cryostat
Description:

Model HE-3-SSV-CF Continuous Flow He-3 cryostat by Janis Research, cryogenics, ultra low temperatureThe model HE-3-SSV-CF is a continuous flow
He-3 cryostat.  A hermetically sealed mechanical pump is employed to circulate the He-3 and cool down the system to the base temperature.  He-3 condenses inside the 1 K pot before it enters the He-3 pot through a condensing impedance.  An external gas handling system with a special liquid nitrogen cold trap is equipped to operate the cryostat.  Turbo pump can be added to further reduce the He-3 vapor pressure so that the system will reach the lower base temperatures.  The sample is typically attached at the bottom of the He-3 pot inside the inner vacuum chamber (IVC) can for cooling.

This system can also be operated in the single shot mode for a lower base temperature of
~350 mK, in which case the holding time will be three days or longer.

The He-3 pot is installed on the system with an indium seal.  It can be replaced with the Janis model JDR-100 dilution stage, which will allow the system to reach a base temperature near 10 mK.

This He-3 cryostat includes the following components:

  • 1 K pot
  • He-3 pumping line
  • He-3 condensing impedance
  • He-3 pot
  • He-3 return line
  • Gas handling system
  • Hermetically sealed pump
  • Electrical controlling circuit with over-pressure safety protection
  • Operation test

Options:

  • Resistive and/or superconducting wires
  • Coaxial cables
  • IVC tail for superconducting magnet
  • Low eddy current cold finger
  • Liquid nitrogen shielded dewar
  • Automatic temperature controller
  • Superconducting magnet
  • Magnet support with high current leads
  • Magnet power supply
  • Helium level sensor and read out
  • Nitrogen level sensor and read out
  • Liquid helium transfer line

 

Performance Specification:
Base Temperature: 450 mK
Holding Time at Base Temperature: Continuously operated
Sample Space: As required
Temperature Range: 0.45 K - 80 K (300 K optional)

 

Mechanical Drawing of Model HE-3-SSV-CF cryostat, Janis Research, cryogenics, ultra low temperature

Table of Contents

Pages
Introduction 1

Standard He-3 Cryostats
HE-3-SSV Insert, Standard Sample Loading, Sample in Vacuum 2
HE-3-SVSD Insert, Standard Sample Loading, Sample in Vacuum for He-4 Storage Dewar 3
HE-3-SSXGAS Insert, Standard Sample Loading, Sample in Exchange Gas 4
HE-3-XGHS Mini-Exchange-Gas Handling System 5
HE-3-SOSV Cryostat, Standard Sample Loading, Optical, Sample in Vacuum 6
HE-3-SOSV-S Cryostat, Standard Sample Loading, Optical, Sample in Vacuum 7
HE-3-SVC Cryostat, Standard Sample Loading, Sample in Vacuum, Compact for Detector Application 8
HE-3-CCR-SSV Cryostat, Standard Sample Loading, Sample in Vacuum, Cryogen-free 9
HE-3-SSV-CF Cryostat, Standard Sample Loading, Sample in Vacuum, Continuous Flow 10
HE-3-TLSL Cryostat, Top Loading, Sample in He-3 Liquid 11
HE-3-TLOSL Cryostat, Top Loading, Optical, Sample in He-3 Liquid 12
HE-3-TLSV Cryostat, Top Loading, Sample in Vacuum 13
Gas Handling System for Top Loading He-3 Systems 14

Special He-3 Cryostats
HE-3-TLSL-NMR Cryostat, Top Loading, Sample in He-3 Liquid for NMR Experiments 15
HE-3-TLSUHV-SPM Cryostat, Top Loading, Sample in UHV for Scanning Probe Microscope System 16
HE-3-SSUHV-SPM/ESR Cryostat, Standard Sample Loading, Sample in UHV for Scanning Probe Microscope System and Electron Spin Resonance System 17
HE-3-BLSUHV-STM Cryostat, Bottom Loading, Sample in UHV for Scanning Tunneling Microscope System 18
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