From b880ee900db6b259ab82f15e5a09b696a0b7b345 Mon Sep 17 00:00:00 2001
From: Walter Van Herck <w.van.herck@fz-juelich.de>
Date: Thu, 6 Feb 2014 14:55:04 +0100
Subject: [PATCH] Added python example script for beam divergence
---
.../ex010_BeamDivergence/BeamDivergence.py | 65 +++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 Examples/python/simulation/ex010_BeamDivergence/BeamDivergence.py
diff --git a/Examples/python/simulation/ex010_BeamDivergence/BeamDivergence.py b/Examples/python/simulation/ex010_BeamDivergence/BeamDivergence.py
new file mode 100644
index 00000000000..06aeaa4abda
--- /dev/null
+++ b/Examples/python/simulation/ex010_BeamDivergence/BeamDivergence.py
@@ -0,0 +1,65 @@
+# Cylinder formfactor in DWBA with beam divergence
+import numpy
+import matplotlib
+import pylab
+from libBornAgainCore import *
+
+def get_sample():
+ """
+ Build and return the sample to calculate cylinder formfactor in Distorted Wave Born Approximation.
+ """
+ # defining materials
+ m_ambience = MaterialManager.getHomogeneousMaterial("Air", 0.0, 0.0)
+ m_substrate = MaterialManager.getHomogeneousMaterial("Substrate", 6e-6, 2e-8)
+ m_particle = MaterialManager.getHomogeneousMaterial("Particle", 6e-4, 2e-8)
+
+ # collection of particles
+ cylinder_ff = FormFactorCylinder(5*nanometer, 5*nanometer)
+ cylinder = Particle(m_particle, cylinder_ff)
+ particle_decoration = ParticleDecoration()
+ particle_decoration.addParticle(cylinder, 0.0, 1.0)
+ interference = InterferenceFunctionNone()
+ particle_decoration.addInterferenceFunction(interference)
+ air_layer = Layer(m_ambience)
+ air_layer.setDecoration(particle_decoration)
+ substrate_layer = Layer(m_substrate, 0)
+
+ multi_layer = MultiLayer()
+ multi_layer.addLayer(air_layer)
+ multi_layer.addLayer(substrate_layer)
+ return multi_layer
+
+def get_simulation():
+ """
+ Create and return GISAXS simulation with beam (+ divergence) and detector defined
+ """
+ simulation = Simulation()
+ simulation.setDetectorParameters(100, 0.0*degree, 2.0*degree, 100, 0.0*degree, 2.0*degree, True)
+ simulation.setBeamParameters(1.0*angstrom, 0.2*degree, 0.0*degree)
+ wavelength_distr = DistributionLogNormal(1.0*angstrom, 0.1)
+ alpha_distr = DistributionGaussian(-0.2*degree, 0.1*degree)
+ phi_distr = DistributionGaussian(0.0*degree, 0.1*degree)
+ simulation.addParameterDistribution("*/Beam/wavelength", wavelength_distr, 5)
+ simulation.addParameterDistribution("*/Beam/alpha", alpha_distr, 5)
+ simulation.addParameterDistribution("*/Beam/phi", phi_distr, 5)
+ return simulation
+
+
+def run_simulation():
+ """
+ Run simulation and plot results
+ """
+ sample = get_sample()
+ simulation = get_simulation()
+ simulation.setSample(sample)
+ simulation.printParameters()
+ simulation.runSimulation()
+ result = simulation.getIntensityData().getArray()
+ pylab.imshow(numpy.rot90(result + 1, 1), norm=matplotlib.colors.LogNorm(), extent=[0.0, 2.0, 0, 2.0])
+ pylab.colorbar()
+ pylab.show()
+
+if __name__ == '__main__':
+ run_simulation()
+
+
--
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