SCRAPER

A collimating element that sticks into the beam from one side only. The directions 0, 1, 2, and 3 are from +x, +y, -x, and -y, respectively.
Parallel capable? : yes

Parameter Name	Units	Type	Default	Description
L	$M$	double	0.0	length
XO	$M$	double	0.0	radiation length
ELASTIC		long	0	elastic scattering? If zero, then particles will lose energy due to material.
ENERGY_STRAGGLE		long	0	Use simple-minded energy straggling model? Ignored for ELASTIC scattering.
Z		long	0	Atomic number
A	$AMU$	double	0.0	Atomic mass
RHO	$KG/M^3$	double	0.0	Density
PLIMIT		double	0.05	Probability cutoff for each slice
POSITION	$M$	double	0.0	position of edge
DX	$M$	double	0.0	misalignment
DY	$M$	double	0.0	misalignment
INSERT_FROM		STRING	NULL	direction from which inserted (+x, -x, +y, -y)
DIRECTION		long	-1	obsolete, use insert_from instead