1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
#!/usr/bin/env python3
"""
Spin-flip scattering by magnetic spheres
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm, R3
def get_sample():
# Materials
B = R3(0, 0, 1e7)
material_particle = ba.RefractiveMaterial("Particle", 2e-05, 4e-07, B)
material_substrate = ba.RefractiveMaterial("Substrate", 7e-06, 1.8e-07)
vacuum = ba.RefractiveMaterial("Vacuum", 0, 0)
# Particles
ff = ba.Sphere(5*nm)
particle = ba.Particle(material_particle, ff)
particle_position = R3(0, 0, -10*nm)
particle.translate(particle_position)
layout = ba.ParticleLayout()
layout.addParticle(particle, 1)
layout.setTotalParticleSurfaceDensity(0.01)
# Multilayer
layer_1 = ba.Layer(vacuum)
layer_2 = ba.Layer(material_substrate)
layer_2.addLayout(layout)
sample = ba.Sample()
sample.addLayer(layer_1)
sample.addLayer(layer_2)
return sample
def get_simulation(sample):
beam = ba.Beam(1e12, 0.1*nm, 0.5*deg)
n = 200
detector = ba.SphericalDetector(n, -3*deg, 3*deg, n, 0, 4*deg)
polarizer_vec = R3(0, 0, 1)
analyzer_vec = R3(0, 0, -1)
beam.setPolarization(polarizer_vec)
detector.setAnalyzer(analyzer_vec)
return ba.ScatteringSimulation(beam, sample, detector)
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
plotargs = bp.parse_commandline()
bp.plot_datafield(result, **plotargs)
bp.export(**plotargs)
|
