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#!/usr/bin/env python3
"""
Basic example for regular small-angle scattering (SAS).
Sample is a dilute assembly of ordered dodecahedra.
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm
def get_sample():
vacuum = ba.RefractiveMaterial("Vacuum", 0, 0)
material_particle = ba.RefractiveMaterial("Particle", 6e-4, 2e-8)
# Finite sample layer, contains particles:
ff = ba.Dodecahedron(12*nm)
particle = ba.Particle(material_particle, ff)
layout = ba.ParticleLayout()
layout.addParticle(particle)
solution_layer = ba.Layer(vacuum, 1000*nm)
solution_layer.addLayout(layout)
# Flat sample layer sandwiched between semi-infinite vacuum layers:
sample = ba.Sample()
sample.addLayer(ba.Layer(vacuum))
sample.addLayer(solution_layer)
sample.addLayer(ba.Layer(vacuum))
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 = 11 # number of pixels per direction
detector = ba.SphericalDetector(n, -5*deg, 5*deg, n, -5*deg, 5*deg)
return ba.ScatteringSimulation(beam, sample, detector)
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
from bornagain import ba_check
ba_check.persistence_test(result)
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