Dell 3100 Spécifications Page 126

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Head, Probe, & Sample Preparation
Basic AFM Operation
106 Dimension 3100 Manual Rev. D
1. Mate the cantilever holder sockets to the Dimension SPM head pins to install the loaded
AFM cantilever holder.
2. Verify the tip points down and away from the head. The end of the cantilever must point in
the direction of the optics assembly.
3. Verify the AFM cantilever holder mounts flat against each pin on the end of the head.
7.2.7 Replace the Dimension SPM Head
1. Carefully slide the Dimension SPM head down into the dovetail groove of the Z-stage SPM.
2. When sliding the SPM head into the dovetail, make sure that the tip will not touch the
sample. If it appears that the tip may touch when the SPM head is fully inserted in the
dovetail, raise the Z-stage by selecting Motor > Withdraw several times, or by selecting
Stage > Focus Surface and raising the Z-stage upward.
3. Loosen the screw located on the right side of the Dimension SPM head dovetail to lock the
head in place (see Figure 7.2d).
7.2.8 Connect the Dimension Head
Insert the Dimension SPM head black 21-pin connector plug into the socket just behind the Z-stage
located on the stage control electronics box (see Figure 7.2d).
7.2.9 Align Laser
For both TappingMode and Contact Mode AFM, the user aligns the laser by moving the laser beam
relative to the cantilever while observing the laser spot on the granite surface (a piece of white
paper also works well) below the Dimension head. If the laser is not on the cantilever substrate, the
laser appears as a bright red spot on the surface below. When the laser is aligned on the cantilever, a
shadow appears on the surface below.
Figure 7.2e displays the laser control knobs located on the top of the Dimension head. There is a
diagram printed on top of the Dimension head illustrating which direction the laser moves when
turning the laser control knobs clockwise.
CAUTION: Turn down the illuminator intensity before proceeding with laser
alignment.
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