The Liquid Pourfill
Dewar is designed for the spectroscopist seeking the advantages
of cryogenically cooled samples. This system allows sample cooldown
from room temperature to 77K in less than ten minutes. Optical access
is provided through two windows
mounted on the Vacuum Shroud
and the sample can be rotated with respect to the optional window.
The base sample temperature
is obtained by the cryogen used to fill the reservoir. When using
the Variable Temperature Pourfill Dewar, a range of test temperatures
is then obtained using a control system consisting of a temperature
reading diode (cold head mount) and a controller to vary the heater
output to arrive at the desired sample temperature(s).
The Pourfill Dewar sample cooler interfaces
with a wide variety of sample
mounts, vacuum shrouds and accessories to provide a versatile
tool for the spectroscopist, material research analyst or engineer.
Electrical signals
can be obtained through a hermetically sealed 26-pin connector.
For high frequency and low noise requirements, either coaxial or
triaxial connectors are an option. An optional compression interlock
accessory may be ordered for fiber optic access.
When a Pourfill Dewar, Fixed or Variable, is
to be ordered the following standard parts would be included as
components of the system, unless custom applications determine differently: