FMULT

Multipole kick element with coefficient input from an SDDS file.

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
FSE		double	0.0	fractional strength error
N_KICKS		long	1	number of kicks
SYNCH_RAD		long	0	include classical synchrotron radiation?
FILENAME		STRING	NULL	name of file containing multipole data
SQRT_ORDER		long	0	Order of expansion of square-root in Hamiltonian. 0 means no expansion.

This element simulates a multipole element using a 4th-order sympletic integration. Specification of the multipole strength is through an SDDS file. The file is expected to contain a single page of data with the following elements:

1. An integer column named order giving the order of the multipole. The order is defined as $(N_{poles}-2)/2$, so a quadrupole has order 1, a sextupole has order 2, and so on.
2. A floating point column named KnL giving the integrated strength of the multipole, $K_n L$, where $n$ is the order. The units are $1/m^n$.
3. A floating point column named JnL giving the integrated strength of the skew multipole, $J_n L$, where $n$ is the order. The units are $1/m^n$.

The MULT element is also available, which allows the same functionality without an external file.