Temperature Control
5
Keysight 5500 SPM User’s Guide
5-22
11
On the Lakeshore controller press
Heater Range
and select
Low
.
12
Press
the
Setpoint
button and enter the desired final temperature.
13
Allow the temperature to stabilize.
14
Initiate an approach.
Tips for Temperature Controlled Imaging
•
Make sure there is good thermal contact between the sample and the
sample plate. If possible, mount the sample using the liquid cell even
for ambient imaging.
•
Double-sided tape reduces thermal conductivity as well as
introducing sample drift. Therefore it should not be used to mount
samples for temperature controlled experiments.
•
It is possible to ramp the temperature while imaging. Use slow
ramps, typically less than 1
C per minute.
•
Every sample will react differently to temperature control. A thin
piece of graphite is a good test sample to use while setting up the
temperature control system.
•
Temperature fluctuations due to excessive gains will cause the
surface to appear wavy. Reduce gains on the Lakeshore controller to
reduce this waviness.
•
Imaging in the environmental chamber is recommended as it will
help keep the temperature stable. Purging the environmental cell
with a dry gas such as nitrogen will help control the sample
environment if condensation from cooling to below the dew point
becomes an issue.
