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#!/usr/bin/env python3
"""
Reflectivity of a multilayer with different widths of the
Gaussian distribution of incident angles alpha_i.
"""
import numpy as np, os, sys
import bornagain as ba
from bornagain import ba_plot as bp, deg, std_samples
def get_sample():
return std_samples.alternating_layers()
def simulate(sample, alpha_width, title):
n = 200
scan = ba.AlphaScan(n, 2*deg/n, 2*deg)
scan.setWavelength(0.154)
scan.setGrazingAngleDistribution(ba.DistributionGaussian(0, alpha_width, 25, 3.))
result = ba.SpecularSimulation(scan, sample).simulate()
result.setTitle(title)
return result
if __name__ == '__main__':
sample = get_sample()
results = [
simulate(sample, 0, "0 deg"),
simulate(sample, 0.003 * deg, "0.003 deg"),
simulate(sample, 0.01 * deg, "0.01 deg"),
simulate(sample, 0.03 * deg, "0.03 deg"),
]
plotargs = bp.parse_commandline()
bp.plot_multicurve(results, **plotargs)
bp.export(**plotargs)
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