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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Basic example for regular small-angle scattering (SAS).
Sample is a dilute assembly of ordered dodecahedra.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm, nm3
def get_sample():
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("Particle", particle_color, 6e-4, 2e-8)
ff = ba.Dodecahedron(12*nm)
particle = ba.Particle(particle_mat, ff)
sample = ba.Cuvette(1000*nm)
sample.middleLayer().fill3D(ba.Dilute3D(1e-7/nm3, particle))
return sample
def get_simulation(sample):
# Beam from above (perpendicular to sample):
beam = ba.Beam(1e9, 0.4*nm, 0.001*deg)
# Detector opposite to source:
n = 200 # number of pixels per direction
detector = ba.SphericalDetector(n, -5*deg, 5*deg, n, -5*deg, 5*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
# Pure SAS form-factor scattering, not an averaged decorated layer.
simulation.options().setUseAvgMaterials(False)
return simulation
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=1000*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1)
ba.plt.show()
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