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.

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
GPU capable? : yes
Back-tracking capable? : yes


Parameter Name	Units	Type	Default	Description

L	M	double	0.0	length

XO	M	double	0.0	radiation length

ENERGY_DECAY		long	0	If nonzero, then particles will lose energy due to material using a simple exponential model.

ENERGY_STRAGGLE		long	0	Use simple-minded energy straggling model coupled with ENERGY_DECAY=1?

NUCLEAR_BREMSSTRAHLUNG		long	0	Model energy loss to nuclear bremsstrahlung? If enabled, set ENERGY_DECAY=0 to disable simpler model.

ELECTRON_RECOIL		long	0	If non-zero, electron recoil during Coulomb scattering is included (results in energy change).

Z		long	0	Atomic number

A	AMU	double	0.0	Atomic mass

RHO	KG∕M³	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, x, +y, -y, y)

DIRECTION		long	-1	Deprecated. use INSERT_FROM.

GROUP		string	NULL	Optionally used to assign an element to a group, with a user-defined name. Group names will appear in the parameter output file in the column ElementGroup

The method used for material modeling is the same as that used for the MATTER element.

The DIRECTION parameter is deprecated and the more versatile INSERT_FROM parameter should be used instead. The values for the latter determine from which side the scraper is inserted. E.g., INSERT_FROM="-x",POSITION=0.005 means the scraper is inserted from the negative x side and extends from x = -∞ to x = 0.005m.

INSERT_FROM="x" or INSERT_FROM="y" means the scraper is inserted from both sides, in which case the interpretation of the position is different. E.g., INSERT_FROM="x",POSITION=0.005 means that only the region x : [-0.005,0.005]m is clear.

10.100 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.