islatu.corrections¶
Reflectometry data must be corrected as a part of reduction. These functions facilitate this, including the footprint and DCD q-variance corrections.
- islatu.corrections.footprint_correction(beam_width, sample_size, theta)[source]¶
The factor by which the intensity should be multiplied to account for the scattering geometry, where the beam is Gaussian in shape.
- Parameters
beam_width (
float
) – Width of incident beam, in metres.sample_size (
float
) – Width of sample in the dimension of the beam, in metres.theta (
float
) – Incident angle, in degrees.
- Returns
Array of correction factors.
- islatu.corrections.get_interpolator(file_path, parser, q_axis_name='qdcd_', intensity_axis_name='adc2')[source]¶
Get an interpolator object from scipy, this is useful for the DCD q-normalisation step.
- Parameters
file_path (
str
) – File path to the normalisation file.parser (
callable
) – Parser function for the normalisation file.q_axis_name (
str
, optional) – Label for the q-value in the normalisation file. Defaults to'qdcd_'
.intensity_axis_name (
str
, optional) – Label for the intensity in the normalisation file. Defaults to'adc2'
.
- Returns
- Containing:
array_like
: Interpolation knots.array_like
: B-spline coefficients.int
: Degree of spline.
- Return type
tuple