ST-400 Ultra High Vacuum (UHV) Cryostat


Click the button below to enlarge view of ST-400 ultra high vacuum (UHV) cryostat from Janis Research, cryogenic equipment

The simplest method of providing cooling in an ultra-high vacuum environment, the ST-400 has all the features of the standard SuperTran cryostats combined with several features that are specific for UHV requirements. Each cryostat is built to order so that the cold finger length and conflat-style vacuum flange may be sized to fit the user's chamber. 


Standard Configuration

Designed for experiments in ultra high vacuum, the Janis Research ST-400 includes the following components:

Click on button below to enlarge view of ST-400 UHV cryostat mechanical drawing, Janis Research, cryogenic equipmentEnlarge

ST-400 UHV Cryostat Mechanical Drawing

  • One (1) 6-pin UHV electrical feedthrough and one (1) 8-pin electrical feedthrough
  • 2.75" rotatable CF style vacuum mounting flange (other sizes available)
  • Gold-plated copper radiation shield and sample mount (NOTE: Standard systems have a nickel undercoat)
  • Temperature sensor
  • 6' superinsulated cryogen transfer line
  • Control heater
  • System test

Typical Applications:

  • Ion Source Cooling
  • Materials Deposition
  • Materials Characterization

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Specification SuperTran
(Sample in Vacuum)
Temperature Range <2-500 K (700 K optional)
Bakeable Up to 200 °C
Initial Cooldown Time 15 minutes
Nominal Temperature Stability (with controller) 50 mK or less
Orientation any position (with increased cryogen consumption)
System Weight (without transfer line) 10 lbs (4.6 kg)
Cryogen Consumption on Cooldown 0.4L LHe (325 - 4.2 K)
0.1L LN2 (325 - 77 K)
Nominal Cryogen Consumption Rate 0.6 L/Hr LHe (5 K) (ST-400-1, ST-400-2)
0.90 L/Hr LHe (5 K) (ST-400-3)
0.1 L/Hr LN2 (80 K)
NOTE: Specifications do not include optical or experimental heat loads and assume vertical orientation.  Specifications may change depending on the length of the transfer line flexible section.

Typical Cryogen Consumption of Optical SuperTran Cryostats

Click button to enlarge view of SuperTran and SuperTranVP liquid helium consumption rate, Janis Research, cryogenic equipment




Other Configurations

Other UHV Configurations:

  • Customized length
  • Other CF style flange sizes
  • Compact system
  • Optical vacuum shrouds  (shown below)
  • Additional multipin feedthroughs
Click image for enlarged view of ST-400 UHV cryostat with custom configuration for optical measurements.  Ref 8942

Model ST-400 Custom Configuration for Optical Measurements


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