Detector resolution function

By default, the detector has perfect resolution. Here we show how to set a finite blur.

  • The detector resolution function is a two-dimensional Gaussian with the same width for the $x$ and $y$ axes: $\sigma_x = \sigma_y = 0.0025^{\circ}$.
  • The wavelength is equal to 0.1 nm.
  • The incident angles are $\sigma_{\alpha_i} = \sigma_{\varphi_i} = 0.1^{\circ}$.

Besides this, the example is a DWBA simulation for our standard sample model, Cylinders in DWBA

  • The sample is composed of monodisperse cylinders deposited on a substrate.
  • The cylinders are dilute, and positioned at random, hence there is no interference between scattered waves.

Intensity image

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#!/usr/bin/env python3
"""
Cylinder form factor in DWBA with detector resolution function applied
"""
import bornagain as ba
from bornagain import ba_plot as bp, deg, nm


def get_sample():
    from bornagain import std_samples
    return std_samples.cylinders()


def get_simulation(sample):
    beam = ba.Beam(1, 0.1*nm, ba.Direction(0.2*deg, 0))
    detector = ba.SphericalDetector(bp.simargs['n'], 2*deg, 1*deg, 1*deg)
    detector.setResolutionFunction(
        ba.ResolutionFunction2DGaussian(0.02*deg, 0.02*deg))
    return ba.ScatteringSimulation(beam, sample, detector)


if __name__ == '__main__':
    bp.parse_args(sim_n=100)
    sample = get_sample()
    simulation = get_simulation(sample)
    result = simulation.simulate()
    bp.plot_simulation_result(result)
Examples/scatter2d/DetectorResolutionFunction.py