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Figure 4
Calculated diffractometer arm angle, 2Θ, for the LaB6 100 peak, d = 4.15689 Å, at 35 keV, 2θ = 4.88410°, as a function of φ, for ϑx = 0 (black) and ϑx = 0.5° (red). Also indicated is the corresponding axial distance, za, of the diffracted beam on the Si 111 analyzer crystal (with L = 442.5 mm). Only when ϑx = 0 is the curve symmetric about the vertical diffraction plane φ = 0. When ϑx = 0.5° the maximum 2Θ is at 4.88416° at φ = 0.5002° with za = 0.328 mm.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 54| Part 4| August 2021| Pages 1088-1099
https://doi.org/10.1107/S1600576721005288
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