Bruker VANTEC-1, Руководство пользователя

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Alignment VÅNTEC-1 Detector User Manual
8 - 4 M88-E01072
8.2 Evaluation and Data
Interpretation
Alignment is complete when FWHM matches
the specifications in Table 8.2. The FWHM (res-
olution) is determined using the AREA feature of
the program DIFFRAC
plus
EVA, which is part of
the DIFFRAC
plus
Basic package supplied with
the diffraction system. To learn how to use EVA
and its AREA function, refer to the DIFFRAC
plus
EVA User Manual (M85-Exx002). Check the
alignment if the detector is removed or moved to
another measuring circle. If specifications are
not met, repeat Section 8.1.
Table 8.2 – FWHM specifications for Cu radiation
1. Start EVA and load the RAW data to evalu-
ate.
2. Open the EVA toolbox (press F2 or the
hammer icon) to perform background sub-
traction and a K
α
2
stripping, ensuring a
properly adjusted K
α
1
/K
α
2
ratio to minimize
artifacts and a 0.5 intensity ratio. Select the
Append button to create a new phase.
3. Use the Area function in the EVA toolbox to
create an area measurement using the
complete measured range (see Figure 8.3).
Use the mouse to select the range.
Figure 8.3 - Complete measured range
Cu Bragg Göbel Mirror
401 mm < 0.065° < 0.130°
435 mm < 0.060° < 0.120°
500 mm < 0.055° < 0.110°
600 mm < 0.055° < 0.110°