GKICKMAP—An ordinary kick map (use UKICKMAP for undualtors).

10.41 GKICKMAP—An ordinary kick map (use UKICKMAP for undualtors).

An ordinary kick map (use UKICKMAP for undualtors).
Parallel capable? : yes
GPU capable? : no
Back-tracking capable? : yes


Parameter Name	Units	Type	Default	Description

L	M	double	0.0	length

TILT	RAD	double	0.0	rotation about longitudinal axis

DX	M	double	0.0	misalignment

DY	M	double	0.0	misalignment

DZ	M	double	0.0	misalignment

FACTOR		double	1	Factor by which to multiply the kicks.

XY_FACTOR		double	1	Factor by which to multiply the x and y values in the input file.

YAW		double	0.0	Yaw angle of the device. Meaningful only if N_KICKS is not 1.

INPUT_FILE		STRING	NULL	Name of SDDS file with undulator kickmap data.

N_KICKS		long	1	Number of kicks into which to split the element.

SYNCH_RAD		short	0	include classical, single-particle synchrotron radiation?

ISR		short	0	include incoherent synchrotron radiation (quantum excitation)?

YAW_END		short	0	-1=Entrance, 0=Center, 1=Exit

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

This element provides simulation a generalized kick map, similar to the UKICKMAP but appropriate for maps that do not pertain to undulators or wigglers.

The input file has the following columns:

x — Horizontal position in meters.
y — Vertical position in meters.
xpFactor — Dimensionless horizontal kick factor. The horizontal kick for any particle with a particular momentum deviation δ is the interpolated value of xpFactor divided by 1 + δ.
ypFactor — Dimensionless horizontal kick factor. The vertical kick for any particle with a particular momentum deviation δ is the interpolated value of ypFactor divided by 1 + δ.

The values of x and y must be laid out on a grid of equispaced points. It is assumed that the data is ordered such that x varies fastest. This can be accomplished with the command

% sddssort -column=y,increasing -column=x,increasing input1.sdds input2.sdds

where input1.sdds is the original (unordered) file and input2.sdds is the new file, which would be used with KICKMAP.

This element is included in beam moments computations via the moments_output command.

The YAW and YAW_END parameters can be used in the simulation of canted IDs. Normally, steering magnets are used to create an angle between the devices. The devices are thus oriented in the reference coordinate system, meaning the beam tranverses the IDs at an angle. If it is desirable to align the IDs to the beam, the IDs can be yawed. A positive yaw will tilt the ID so that it is colinear with a beam that has been kicked by a positive horizontal steering angle. The YAW_END parameter defines which end of the ID is held fixed when the yaw is applied.

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