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TSPDF—measurement specs

Written by Maxwell Terban

Updated at March 30th, 2025

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Table of Contents

Total scattering Pair distribution function

Total scattering

Detector Pilatus3 X CdTe 2M
Beam position on corner of detector (quarter detector)
Minimum energy threshold 37.5 keV
Detector distance 0.3 m
Wavelength / Energy 0.165 Å / 75.0 keV
Beam size ⌀ 0.05–0.075 mm 
Focusing on detector via transfocator
Q-range 0.32–31 Å-1
d-spacing 20–0.2 Å
Peak resolution 0.02 Å-1 (first peak integral breadth for LaB6 660b)
Sample thickness 1 mm
Sample motion vibration plus active translation

Pair distribution function

Usable Qmax ≤20–30 Å-1 (depending on the sample)
Real space Δd approx. ≥0.16–0.11 Å (determined as π/Qmax)
Maximum distance ≤250–300 Å
Qdamp 0.009 Å2 (PDFgui)
Qbroad 0.015 Å2 (PDFgui)
specs tspdf

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