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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
GISAS simulation including the specular peak, for cylinders
on a square 2D lattice.
Same sample as SquareLattice2D.py (Crystal2D, 10 nm spacing,
5 nm cylinders, Cauchy decay). Specular peak is enabled via
simulation.options().setIncludeSpecular(True).
"""
from math import pi
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
def get_sample():
# Materials
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("Particle", particle_color, 6e-4, 2e-8)
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 6e-6, 2e-8)
vacuum = ba.Vacuum()
# Particles
ff = ba.Cylinder(5 * nm, 5 * nm)
particle = ba.Particle(particle_mat, ff)
# Square lattice with Crystal2D and Cauchy decay
lattice = ba.SquareLattice2D(10 * nm, 0)
layout = ba.Crystal2D(particle, lattice)
profile = ba.Profile2DCauchy(
300 / (2 * pi) * nm, 100 / (2 * pi) * nm, 0)
layout.setDecayFunction(profile)
# Layers
layer_1 = ba.Layer(vacuum)
layer_1.deposit2D(layout)
layer_2 = ba.Layer(substrate_mat)
# Sample
sample = ba.Sample()
sample.addLayer(layer_1)
sample.addLayer(layer_2)
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, 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=300*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1, log_range=8)
ba.plt.show()
|
BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Simulation setup and instrument ≻ Lattice with specular
