Module traceon.focus

Module containing a single function to find the focus of a beam of electron trajecories.

Functions

def focus_position(positions)

Find the focus of the given trajectories (which are returned from Tracer.__call__()). The focus is found using a least square method by considering the final positions and velocities of the given trajectories and linearly extending the trajectories backwards.

Parameters

positions : iterable of (N,6) np.ndarray float64

Trajectories of electrons, as returned by Tracer.__call__()

Returns

(3,) np.ndarray of float64, representing the position of the focus