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#!/usr/bin/env python3
"""
Example of simulating a reflectometry experiment
with a rough sample using BornAgain.
"""
import bornagain as ba
from bornagain import nm, ba_plot as bp, deg, nm
def get_sample():
# Materials
vacuum = ba.MaterialBySLD("Vacuum", 0, 0)
material_ti = ba.MaterialBySLD("Ti", -1.9493e-06, 0)
material_ni = ba.MaterialBySLD("Ni", 9.4245e-06, 0)
material_substrate = ba.MaterialBySLD("SiSubstrate", 2.0704e-06, 0)
# roughness
autocorr = ba.SelfAffineFractalModel(1*nm, 0.7, 25*nm)
transient = ba.TanhTransient()
roughness = ba.Roughness(autocorr, transient)
# Layers
ambient_layer = ba.Layer(vacuum)
ti_layer = ba.Layer(material_ti, 3*nm, roughness)
ni_layer = ba.Layer(material_ni, 7*nm, roughness)
substrate_layer = ba.Layer(material_substrate, roughness)
# Periodic stack
n_repetitions = 10
stack = ba.LayerStack(n_repetitions)
stack.addLayer(ti_layer)
stack.addLayer(ni_layer)
# Sample
sample = ba.Sample()
sample.addLayer(ambient_layer)
sample.addStack(stack)
sample.addLayer(substrate_layer)
return sample
def get_simulation(sample):
n = 500
scan = ba.AlphaScan(n, 2*deg/n, 2*deg)
scan.setWavelength(0.154*nm)
return ba.SpecularSimulation(scan, sample)
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
plotargs = bp.parse_commandline()
bp.plot_datafield(result, **plotargs)
bp.export(**plotargs)
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