Specific Heat Measurement
Systems
Specific heat measurements are made for
samples with microgram weights using a miniature calorimeter on
a silicon nitride membrane with thermometer
and heater. The calorimeter operates in low
temperature exchange gas and is enclosed in a chamber with access via a
conical seal. The sample is mounted using Apieson
grease to the calorimeter chip.
The normal temperature range is
5 to 300K.
The Cryogenic Specific measurement system
has the following competitive features:
- Low
amplitude of temperature oscillations and hence high
temperaurte resolution (0.1K typically).
- Fast measurements as the
frequency of the temperature modulation is of the order
of 10 to 100 Hertz.
- Robust and durabile with
reasonable care the lifetime of a single sensor can span
over tens of sample replacements.
- High sensitivity of 1 nJ/K
through out the temperature range 5-300K.
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