Stereo Scan 440 - DCU

Assembly
Assembly
.
of the STEM detector is a very simple procedure.
Remove the ZTR module from the stage in the nonna] manner.
. Position the STEM detector assembly onto the rear of the stage.
Underneath the detector assembly are two pins, these help to locate the
detector assembly correctly onto the stage where it can then be secured
.
using the two M3 x 12 screws provided.
Refit the ZTR module onto the SEM stage, ensuring that there is enough
Z clearance to allow the STEM sample holder to be fitted without hitting
and damaging the STEM detector.
Once the samples have been mounted into the STEM sample holder. this
can then be fitted in place of the normal SEM carousel. It is a good idea
to position an empty sample hole over the detector cut-out to aid final
positioning of the stage during operation.
. Partially close the stage door ensuring that there is adequate clearance
for the stage beneath the final lens and any other detectors in the
chamber, and carefully fit the cable from the detector to the feedthrough.
Ensure that this cable will not foul on anything inside the chamber
during operation before closing the chamber completely and pumping
the system down again.
Operation
To use the S1EM detector. it is first necessary to ensure that the stage with the
S1EM sample holder is con-ectly positioned over the S1EM detector to allow the
electron beam to pass through the sample holder and reach the S1EM detector.
This is the reason for leaving a empty sample hole over the detector during
assembly. Using the stage X and Y controls manoeuvre the stage in order to find
this empty sample hole whilst viewing the image with the SE detector. and once
found it is wise to record this position to simplify S1EM operation and assembly
on the next occasion. Typical figures should be about X = 49.2 and Y = 10.1.
Stereoscan 440 Operator Manual