vacuum cryostat

The model HE-3-SOSV-S is a special optical cryostat. Optical windows with typical clear view size of 0.5" are installed on the vacuum shroud, as well as both the liquid nitrogen and liquid helium temperature radiation shields.

A special sample positioner with rotary/linear motion manipulator is installed at the top of the sample positioner so that the sample can be moved up and down, as well as rotated. OFHC copper braids are employed to provide the flexibilities of motion and rotation. A double optical sample holder is installed at the bottom of the sample positioner for reference and sample measurements.

This He-3 cryostat includes the following components:
Highly efficient liquid nitrogen shielded helium dewar
Liquid nitrogen temperature radiation with optical windows
Liquid helium temperature radiation with optical windows
1 K radiation shield
Charcoal sorption pumps with heaters and thermometers
1 K pots with thermometers
He-3 pots with heaters and thermometers
He-3 gas
Sample probe with rotary/linear motion manipulator
Sample mount with heater and thermometer
Operation test