HE-3-TLOSL Optical Cryostat - Top Sample Loading, Sample in Liquid
The model HE-3-TLOSL cryostat has optical access to the sample as well as top loading of the sample into the cryostat.
The model HE-3-TLOSL cryostat has optical access to the sample as well as top loading of the sample into the cryostat. This allows the sample to be removed from and introduced into the He-3 chamber while the cryostat is cold. Optical windows are installed on the vacuum shroud, the radiation shields, and the He-3 sample chamber. This permits a light beam to travel through the cryostat vacuum, without passing through the shielding cryogenics (nitrogen and He-4). The system includes a sample probe and a vac-lock system 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.
HE-3-TLOSL Optical Cryostat Mechanical Drawing
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)
- High efficiency liquid helium cryostat
- Sample probe with thermal anchor stage, thermometer, and heater
- Optical windows
- External gas handling system with stored He-3 gas
- External sorption cryo-pump
- Operation test
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Base temperature: 400 mK (typical, depending on window size)
Holding time at base temperature: 16 - 24 hours (typical)
Operation temperature range: 0.3 K - 80 K (300 K optional)
Sample space: 0.5" - 1.0"
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