User Manual LYNXEYE XE Detector
3-8 DOC-M88-EXX240 V1 – 03.2014
3.5 Instrument Performance Test
For a quick performance test of the instrument use the NIST SRM 1976 standard sample and deter-
mine the resolution of the main peak. The system should match the specifications in Table 3.1.
Perform a 2 degree locked coupled (continuous) scan with the main peak centered (e.g.
2Theta = 34.15 to 36.15 for Cu radiation). Refer to Table 6.4 for instrument parameters.
The FWHM (resolution) is determined using the AREA feature of the program DIFFRAC.EVA, which is
part of the DIFFRAC.Measurement Suite Basic package supplied with the diffraction system. To learn
how to use EVA and its AREA function, refer to the DIFFRAC.EVA User Manual (DOC-M88-EXX200).
Table 3.1: FWHM specifications for Cu radiation
Cu Bragg Göbel Mirror*
401 mm
0.060° 0.130°
435 mm
0.055° 0.120°
500 mm
0.050° 0.110°
600 mm < 0.050° < 0.110°
* parallel beam type
Start DIFFRAC.EVA and load the BRML data to evaluate.
1. Open the EVA toolbox to perform background subtraction and a Kα
2
stripping, ensuring a properly
adjusted Kα
1
/Kα
2
ratio to minimize artefacts and a 0.5 intensity ratio. Select the Append button to
create a new phase.
2. Use the Create Area function in the EVA toolbox to create an area measurement using the com-
plete measured range (see Figure 3.6). Use the mouse to select the range. Review the data dis-
played in Toolbox.
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