FarLabPointSource

class marxs.source.FarLabPointSource(sourcePos, **kwargs)

Bases: Source, FlatOpticalElement

Simple in-lab point source used with aperture

• assumes point source is far from a rectangular aperture, and only the photons that pass through are tracked

• photon start positions uniformly distributed within rectangular aperture (reasonable approximation if source is far)

• photon direction determined by location of source, and selected photon starting position

• aperture is in its local y-z plane

Parameters:

sourcePos: 3 element list

3D coordinates of photon source (not aperture)

kwargs:

pos4d or position, orientation, and zoom can be used to set the position, size and orientation of the rectangular apeture; see pos4d for details. 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.