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Figure 2
The two-dimensional part of the Q resolution ellipsoid for a triple-axis spectrometer, indicated in red. The scattering vector Q = kf − ki, with the size of the analyser, determines the 3D Q resolution, which can be split into three components: two dQ principal axes in the scattering plane, one narrow and one wide, and dQvert, which is the resolution out of the scattering plane (wide, and not drawn). The instrument also has an energy resolution which needs to be taken into account.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 3| June 2026| Pages 783-798
https://doi.org/10.1107/S1600576726002049
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