toolbox_scs.base.knife_edge¶
Module Contents¶
Functions¶
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Calculates the beam radius at 1/e^2 from a knife-edge scan by |
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The base implementation of the knife-edge scan analysis. |
- toolbox_scs.base.knife_edge.knife_edge(positions, intensities, axisRange=None, p0=None)[source]¶
Calculates the beam radius at 1/e^2 from a knife-edge scan by fitting with erfc function: f(a,b,u) = a*erfc(u) + b or where u = sqrt(2)*(x-x0)/w0 with w0 the beam radius at 1/e^2 and x0 the beam center.
- Parameters
positions (np.ndarray) – Motor position values, typically 1D
intensities (np.ndarray) – Intensity values, could be either 1D or 2D, with the number or rows equivalent with the position size
axisRange (sequence of two floats or None) – Edges of the scanning axis between which to apply the fit.
p0 (list of floats, numpy 1D array) – Initial parameters used for the fit: x0, w0, a, b. If None, a beam radius of 100 um is assumed.
- Returns
width (float) – The beam radius at 1/e^2
std (float) – The standard deviation of the width
- toolbox_scs.base.knife_edge.knife_edge_base(positions, intensities, axisRange=None, p0=None)[source]¶
The base implementation of the knife-edge scan analysis.
Calculates the beam radius at 1/e^2 from a knife-edge scan by fitting with erfc function: f(a,b,u) = a*erfc(u) + b or where u = sqrt(2)*(x-x0)/w0 with w0 the beam radius at 1/e^2 and x0 the beam center.
- Parameters
positions (np.ndarray) – Motor position values, typically 1D
intensities (np.ndarray) – Intensity values, could be either 1D or 2D, with the number or rows equivalent with the position size
axisRange (sequence of two floats or None) – Edges of the scanning axis between which to apply the fit.
p0 (list of floats, numpy 1D array) – Initial parameters used for the fit: x0, w0, a, b. If None, a beam radius of 100 um is assumed.
- Returns
popt (sequence of floats or None) – The parameters of the resulting fit.
pcov (sequence of floats) – The covariance matrix of the resulting fit.