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"""
example script to show how the detector parameters
such as pixel width, center channel and detector tilt
can be determined for a linear detector.
"""
import os
import xrayutilities as xu
# load any data file with with the detector spectra of a reference scan
# in the primary beam, here I use spectra measured with a Seifert XRD
# diffractometer
dfile = os.path.join("data", "primarybeam_alignment20130403_2_dis350.nja")
s = xu.io.SeifertScan(dfile)
ang = s.axispos["T"] # detector angles during the scan
spectra = s.data[:, :, 1] # detector spectra aquired
# determine detector parameters
# this function accepts some optional arguments to describe the goniometer
# see the API documentation
pwidth, cch, tilt = xu.analysis.linear_detector_calib(ang, spectra,
usetilt=True)
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