H. Customer Acceptance Test Protocol
DOC-M88-EXX157_V17_04.2019 91 / 96
Part II: Angular Accuracy, Instrument Response and Resolution
Anode: Co Parallel Beam Geometry
Angular Accuracy: Difference Deflection angle corr Instrument Resolution
Maximum allowed 2θ deviation depends on height FWHM
obs
< FWHM
max
2θ
obs
[°]
Difference 2θ
obs
Deflection
angle corr
Difference
Deflection
angle corr
2θ
exp
1)
[°]
FWHM
obs
[°]
FWHM
max
2)
[°]
29.773
41.041
81.250
118.165
Deflection angle corr
½(Difference
max
+Difference
min
)
Detector
3)
Current Deflection angle Shift
2-Theta
3)
Corrected Deflection angle
(Current Deflection angle -
Deflection angle corr) Height Maximum allowed shift 2θ [°] for specified accuracy of:
Vertical 150 0.02 ± 0.01°
For details cf. chapter Reference Values [}15]
214 0.03 ± 0.015°
obs: observed 258 0.04 ± 0.02°
exp: expected Horizontal 214 0.02 ± 0.01°
corr: corrected 258 0.02 ± 0.01°
1)
see table 3.2
2)
see table 3.4
3)
mark applicable: detector in case of Theta/Theta and 2-Theta in case of Theta/2Theta
Depending on specific measurement setups, individual reflections may not be measurable. Then measurements must be restricted to accessible reflections.