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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Spheroid particles attached to the top of a substrate.
The particle center is placed at the vacuum-substrate interface.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm, nm2
def get_sample():
"""
Two-layer sample (vacuum + substrate) with spheroid particles
attached to the top of the substrate layer.
"""
# Materials
vacuum = ba.Vacuum()
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 6e-6, 2e-8)
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("Particle", particle_color, 3e-5, 2e-8)
# Spheroid particle (equatorial radius 4nm, polar radius 6nm)
ff = ba.Spheroid(4*nm, 6*nm)
particle = ba.Particle(particle_mat, ff)
# Shift up so center lands at the interface
# (suspend2D anchors the top by default)
particle.translate(0, 0, particle.height_above_center())
# Layers
vacuum_layer = ba.Layer(vacuum)
substrate_layer = ba.Layer(substrate_mat)
substrate_layer.suspend2D(ba.Dilute2D(0.01/nm2, particle))
# Sample
sample = ba.Sample()
sample.addLayer(vacuum_layer)
sample.addLayer(substrate_layer)
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, 3*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
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 ≻ Attach above substrate
