LabPointSourceCone

class marxs.source.LabPointSourceCone(position=[0, 0, 0], half_opening=3.141592653589793, direction=[1.0, 0.0, 0.0], **kwargs)

Bases: Source

In-lab point source

• Photons are uniformly distributed in all directions in cone (from the point). Cone is meant to refer to the volume swept out by a solid angle in a unit sphere centered at the point source.

• Photon start position is source position (tip of cone)

Parameters

position: array-like of shape(3,)

Euclidean coordinates of photon source. Default is at the origin of the coordinate system.

half_opening: float

This is half the opening angle of the cone. It is given in steradians. The default is pi, which distributes the photons evenly over the entire sphere.

direction: array-like of shape (3,)

This is the direction of the center of the cone. Default is the positive x-axis.

kwargssee Source

Other keyword arguments include flux, energy and polarization. See Source for details.

Define a new MARXS element.

Methods Summary

generate_photons(exposuretime)

Central function to generate photons.

Methods Documentation

generate_photons(exposuretime: Unit('s'))

Central function to generate photons.

Calling this function generates a photon table according to the flux, energy, and polarization of this source. The number of photons depends on the total exposure time, which is a parameter of this function. Depending on the setting for flux the photons could be distributed equally over the interval 0..exposuretime or follow some other distribution.

Parameters

exposuretimeastropy.quantity.Quantity

Total exposure time.

Returns

photonsastropy.table.Table

Table with photon properties.