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#!/usr/bin/env python3
"""
Cylinder form factor in Born approximation
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm
def get_sample():
"""
A sample with cylinders in a homogeneous environment ("Vacuum"),
implying a simulation in plain Born approximation.
"""
# Materials
material_particle = ba.RefractiveMaterial("Particle", 0.0006, 2e-08)
vacuum = ba.RefractiveMaterial("Vacuum", 0, 0)
# Form factors
ff = ba.Cylinder(5*nm, 5*nm)
# Particles
particle = ba.Particle(material_particle, ff)
# Particle layouts
layout = ba.ParticleLayout()
layout.addParticle(particle)
layout.setTotalParticleSurfaceDensity(0.01)
# Layers
layer = ba.Layer(vacuum)
layer.addLayout(layout)
# Sample
sample = ba.Sample()
sample.addLayer(layer)
return sample
def get_simulation(sample):
beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
n = 200
detector = ba.SphericalDetector(n, -2*deg, 2*deg, n, 0, 3*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
return simulation
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
bp.plot_datafield(result)
bp.plt.show()
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