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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
GISAS of a thick, highly absorptive Au layer on Si, at extra-long wavelength.
Au (SLD: 3.484e-5, 1.791e-5) on a 10 nm vacuum gap on Si (SLD: 3.842e-7,
6.282e-7) with ErfTransient roughness. Beam wavelength 12 nm tests
the numerics under strong absorption.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
def get_sample():
au_color = (0.93, 0.72, 0.25)
au_mat = ba.SLDMaterial("Au", au_color, 3.48388057043e-05, 1.79057609656e-05)
si_color = (0.30, 0.62, 0.86)
si_mat = ba.SLDMaterial("Si", si_color, 3.84197565094e-07, 6.28211531498e-07)
autocorr = ba.SelfAffineFractalModel(5*nm, 0.5, 10*nm)
transient = ba.ErfTransient()
roughness = ba.Roughness(autocorr, transient)
vacuum_layer = ba.Layer(ba.Vacuum())
au_layer = ba.Layer(au_mat, 200*nm)
vacuum_layer_2 = ba.Layer(ba.Vacuum(), 10*nm)
substrate_layer = ba.Layer(si_mat, roughness)
sample = ba.Sample()
sample.addLayer(vacuum_layer)
sample.addLayer(au_layer)
sample.addLayer(vacuum_layer_2)
sample.addLayer(substrate_layer)
return sample
def get_simulation(sample):
beam = ba.Beam(1e8, 12*nm, 0.2*deg)
n = 100
detector = ba.SphericalDetector(n, -2*deg, 2*deg, n, 0, 2*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
simulation.options().setIncludeSpecular(True)
return simulation
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=120*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1)
ba.plt.show()
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BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Particles, layers, and interfaces ≻ Thick absorptive sample with roughness
