SCATTER

A scattering element to add gaussian random numbers to particle coordinates.

Parameter Name	Units	Type	Default	Description
X	$M$	double	0.0	rms scattering level for x
XP	$M$	double	0.0	rms scattering level for x'
Y	$M$	double	0.0	rms scattering level for y
YP	$M$	double	0.0	rms scattering level for y'
DP	$M$	double	0.0	rms scattering level for (p-pCentral)/pCentral
PROBABILITY		double	1	Probability that any particle will be selected for scattering.