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#!/usr/bin/env python3
"""
Basic offspec example.
Sample is a grating on a substrate, modelled by a 1d lattice of long boxes
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm
def get_sample():
# Materials
material_particle = ba.RefractiveMaterial("Particle", 0.0006, 2e-08)
material_substrate = ba.RefractiveMaterial("Substrate", 6e-06, 2e-08)
vacuum = ba.RefractiveMaterial("Vacuum", 0, 0)
# Particles
ff = ba.Box(1000*nm, 20*nm, 10*nm)
particle = ba.Particle(material_particle, ff)
particle_rotation = ba.RotationZ(90*deg)
particle.rotate(particle_rotation)
# Interference functions
iff = ba.Interference1DLattice(100*nm, 0)
profile = ba.Profile1DCauchy(1e6*nm)
iff.setDecayFunction(profile)
# Particle layouts
layout = ba.ParticleLayout()
layout.addParticle(particle)
layout.setInterference(iff)
layout.setTotalParticleSurfaceDensity(0.01)
# Layers
layer_1 = ba.Layer(vacuum)
layer_1.addLayout(layout)
layer_2 = ba.Layer(material_substrate)
# Sample
sample = ba.Sample()
sample.addLayer(layer_1)
sample.addLayer(layer_2)
return sample
def get_simulation(sample):
nscan = <%= test_mode ? 50 : 200 %>
ny = 50
scan = ba.AlphaScan(nscan, 0.1*deg, 10*deg)
scan.setIntensity(1e9)
scan.setWavelength(0.1*nm)
detector = ba.OffspecDetector(ny, -1*deg, +1*deg, nscan, 0.1*deg, 10*deg)
return ba.OffspecSimulation(scan, sample, detector)
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
<%- if test_mode -%>
from bornagain import ba_check
ba_check.persistence_test(result)
<%- elsif figure_mode -%>
plotargs = bp.parse_commandline()
plotargs['intensity_min'] = 1
bp.plot_datafield(result, **plotargs)
bp.export(**plotargs)
<%- else -%>
bp.plot_datafield(result, intensity_min=1)
bp.plt.show()
<%- end -%>
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