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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Polarized GISAS in transmission geometry (PM channel) of magnetic spheres.
Magnetic spheres (R = 5 nm, z-magnetisation 1e7 A/m) are embedded in a
substrate. The detector is placed below the horizon (transmission side),
and the PM spin-flip channel (+Z polariser, -Z analyser) is recorded.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm, R3
def get_sample():
vacuum = ba.Vacuum()
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 7e-6, 1.8e-7)
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial(
"Particle", particle_color, 2e-5, 4e-7, R3(0, 0, 1e7))
ff = ba.Sphere(5*nm)
particle = ba.Particle(particle_mat, ff)
particle.translate(R3(0, 0, -10*nm))
vacuum_layer = ba.Layer(vacuum)
vacuum_layer.deposit2D(ba.Dilute2D(0.001, particle))
substrate_layer = ba.Layer(substrate_mat)
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, -2*deg, 0)
beam.setPolarization(R3(0, 0, 1))
detector.setAnalyzer(R3(0, 0, -1))
return ba.ScatteringSimulation(beam, sample, detector)
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 ≻ Magnetic scattering ≻ Magnetic spheres transmission
