Time-of-flight reflectometry

This example shows how to set up a $q_z$ scan using a NumPy array. This can be used to simulate a time-of-flight (TOF) reflectometry experiment.

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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.
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):
    """
    Defines and returns specular simulation
    with a qz-defined beam
    """
    n = bp.simargs['n']
    qzs = np.linspace(0.01, 1, n)  # qz-values
    scan = ba.QzScan(qzs)
    return ba.SpecularSimulation(scan, sample)


if __name__ == '__main__':
    bp.parse_args(sim_n=500)
    sample = get_sample()
    simulation = get_simulation(sample)
    result = simulation.simulate()
    bp.plot_simulation_result(result)
Examples/specular/TimeOfFlightReflectometry.py