| Crystal Research and Technology |
The reflection curves as measured by means of the "Ω-Scan Method" have been simulated as exactly as possible and practicable. The contributions of the collimator function for different beam geometry and of the spectral distribution are considered. The influence of the dead time of the counting unit on the fluctuations of the used high intensities is described by computer modelling. By means of the simulated curves, the theoretical statistic errors of the method, employed to the orientation determination of quartz, can be estimated and compared to the measured ones. The statistic errors due to the intensity fluctuations were found to be dominating the measuring errors. From the simulated curves also the corrections to be applied to the measuring values of the peak positions are derived. Thus, the real physical values of the orientation coordinates can be determined.
Keywords: Ω-Scan Method, orientation determination of quartz, simulation of reflection curves, dead-time influence, statistic and systematic errors
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