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#!/usr/bin/env python3
"""
Example of simulating a rough sample with a
tanh and Nevot-Croce roughness model using BornAgain.
"""
from matplotlib import pyplot as plt
import bornagain as ba
from bornagain import angstrom, ba_plot as bp, deg
def get_sample(roughness_model):
# create 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)
# create layers
ambient_layer = ba.Layer(vacuum)
ti_layer = ba.Layer(material_ti, 30*angstrom)
ni_layer = ba.Layer(material_ni, 70*angstrom)
substrate_layer = ba.Layer(material_substrate)
# Roughness
roughness = ba.LayerRoughness(10*angstrom)
# create sample
sample = ba.MultiLayer()
sample.addLayer(ambient_layer)
for _ in range(10):
sample.addLayerWithTopRoughness(ti_layer, roughness)
sample.addLayerWithTopRoughness(ni_layer, roughness)
sample.addLayerWithTopRoughness(substrate_layer, roughness)
sample.setRoughnessModel(roughness_model)
return sample
def get_simulation(sample):
n = 500
scan = ba.AlphaScan(n, 2*deg/n, 2*deg)
scan.setWavelength(1.54*angstrom)
return ba.SpecularSimulation(scan, sample)
def simulate(roughness_model, title):
"""
Runs simulation and returns its result.
"""
sample = get_sample(roughness_model)
simulation = get_simulation(sample)
result = simulation.simulate()
result.setTitle(title)
return result
if __name__ == '__main__':
results = [
simulate(ba.RoughnessModel.NEVOT_CROCE, "Névot-Croce"),
simulate(ba.RoughnessModel.TANH, "Tanh"),
]
bp.plot_multicurve_specular(results)
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