ST-400 Ultra-High Vacuum (UHV) Cryostat

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

ST-400 Ultra High Vacuum Supertran Cryostat

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

  • One (1) 6-pin UHV electrical feedthrough and one (1) 8-pin electrical feedthrough
  • 2.75 in 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 ft superinsulated cryogen transfer line
  • Control heater
  • System test

Typical applications:

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ST-400 Ultra High Vacuum SuperTran Cryostat

ST-400 Specifications

Temperature range<2 to 500 K (700 K optional)
BakeableUp to 200 °C
Initial cooldown time15 min
Nominal temperature stability (with controller)50 mK or less
OrientationAny position (with increased cryogen consumption)
System weight (without transfer line)10 lb (4.6 kg)
Cryogen consumption on cooldown0.4 L LHe (325 to 4.2 K)
0.1 L LN2 (325 to 77 K)
Nominal cryogen consumption rate0.6 L/h LHe (5 K) (ST-400-1, ST-400-2)
0.90 L/h LHe (5 K) (ST-400-3)
0.1 L/h 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.


Other configurations

Other UHV configurations:

  • Customized length
  • Other CF-style flange sizes
  • Compact system
  • Optical vacuum shrouds (shown below)
  • Additional multipin feedthroughs

Model ST-400 custom configuration for optical measurements

ST-400 Ultra High  Vacuum cryostat for optical measurements