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#!/usr/bin/env python3
"""
An example of defining reflectometry instrument
for time of flight experiment. In this example
we will use purely qz-defined beam,
without explicitly specifying
incident angle or a wavelength.
Additionally we will set pointwise resolution
to the scan.
Note that these approaches work with SLD-based
materials only.
"""
import numpy as np
import bornagain as ba
from bornagain import ba_plot as bp, std_samples
def get_sample():
return std_samples.alternating_layers()
def get_simulation(sample):
"Specular simulation with a qz-defined beam"
n = 500
qzs = np.linspace(0.01, 1, n) # qz-values
dq = 0.03*qzs
distr = ba.DistributionGaussian(0., 1., 25, 2.)
scan = ba.QzScan(qzs)
scan.setVectorResolution(distr, dq)
return ba.SpecularSimulation(scan, sample)
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)
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