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
59
|
#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Dilute film of small spheres: scattering intensity for different particle densities.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
thickness = 100*nm
def get_sample(density):
# Materials
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("Particle", particle_color, 1e-5, 0)
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 1e-6, 0)
vacuum = ba.Vacuum()
# Particles
ff = ba.Sphere(4*nm)
particle = ba.Particle(particle_mat, ff)
# Layers
layer_1 = ba.Layer(vacuum)
layer_2 = ba.Layer(vacuum, thickness)
layer_3 = ba.Layer(substrate_mat)
layer_2.fill3D(ba.Dilute3D(density, particle))
# Sample
sample = ba.Sample()
sample.addLayer(layer_1)
sample.addLayer(layer_2)
sample.addLayer(layer_3)
return sample
def get_simulation(sample):
beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
n = 300
# Just compute a 1d cut at phi=0
detector = ba.SphericalDetector(1, -1*deg, 1*deg, n, 0., 2*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
return simulation
if __name__ == '__main__':
densities = [1e-9, 3.16e-9, 1e-8, 3.16e-8, 1e-7]
samples = [get_sample(d) for d in densities]
results = [get_simulation(sample).simulate() for sample in samples]
ba.showSample3D(samples[-1], sample_size=1000*nm, seed=0)
for r in results:
ba.plot_datafield(r, intensity_min=1e-5, intensity_max=1e3)
ba.plt.legend([f'{d*1e9:.2g}/nm³' for d in densities])
ba.plt.show()
|
BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Particles, layers, and interfaces ≻ Film vs density
