Hardware Installation for the D8 ADVANCE VÅNTEC-1 Detector User Manual
4 - 26 M88-E01072
4.8.3 Mount and Align the Air Scatter
Screen
The air scatter screen will provide a greater
noise-to-signal ratio, enabling better phase iden-
tification with smaller sample amounts. The air
scatter screen is beneficial with linear detectors
like the MBraun PSD or VÅNTEC-1. Do not
move θ or the tube lower than 0° with the air
scatter screen attached in order to avoid colli-
sion with the stage. The air scatter screen
should be retracted during system alignment
and when the scan range for theta is less than
0°.
Complete the following steps for proper installa-
tion, alignment and use of the air scatter screen.
Test the final settings with an intensity standard
like the NIST SRM1976 Corundum plate. Use a
procedure similar to that in the Instrument Verifi-
cation Booklet M88-Zxx041 for final documenta-
tion of the instrument results.
To mount the air scatter screen:
1. Attach the air scatter screen to the primary
divergence slit devices.
2. Remove the flange plate by removing the
two screws labeled “3” in Figure 4.28.
3. Mount the air scatter screen to the diver-
gence assembly by aligning the two holes to
the matching alignment pin (item 4 in Figure
4.28) located on the plates of the primary
optics. See Figure 4.28 as an example of
mounting for a variable divergence slit
assembly.
4. The plates of the primary optics have two
screw holes (item 3 in Figure 4.28) used for
securing the air scatter screen to the diver-
gence assembly. Secure the air scatter
screen using two Torx M3x10mm screws
(item 2 in Figure 4.28).
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