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
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 Specifications
| Temperature range | <2 to 500 K (700 K optional) | |
| Bakeable | Up to 200 °C | |
| Initial cooldown time | 15 min | |
| Nominal temperature stability (with controller) | 50 mK or less | |
| Orientation | Any position (with increased cryogen consumption) | |
| System weight (without transfer line) | 10 lb (4.6 kg) | |
| Cryogen consumption on cooldown | 0.4 L LHe (325 to 4.2 K) 0.1 L LN2 (325 to 77 K) | |
| Nominal cryogen consumption rate | 0.6 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
