SAXS‑FFT 2D microstructure → scattering

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Joaquin Ramirez-Rico, University of Seville · mates-lab.es · source

Microstructure

Type

Grid & contrast

Grid N Pixel size anm Seed ρ matrix ρ particle Invert phases (Babinet)

Scattering

Subtract mean ρ (remove q = 0 spike) Window Zero padding 1D range Resolution smearing (Gaussian in q) Smearing FWHM× Δq Include pixel blur in analytic curve

Display

Colormap 2D scale 2D range6 dec 2D topmax Analytic particles (S = 1) Porod law 2Δρ²(P/A) q⁻³ Guinier I₀ exp(−q²Rg²/2) log q log I

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Microstructure ρ(x, y)

Scattering pattern log₁₀ I(qx, qy)

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