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,)

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

half_opening: float

This is half the openning 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.