Focusing Parameters

The field strength of (F-)quadrupoles, focusing in the x-plane.

The fields strength of (D-)quadrupoles, defocusing in the x-plane. GENESIS 1.3 automatically applies the correct signs to QUADF and QUADD indicating the alternating focusing in the FODO-lattice.

Length of the F-quadrupoles in measures of the undulator period. The integration step size DELZ must resolve the quadrupole length.

Length of the D-quadrupoles in measures of the undulator period.

Drift length between F- and D-quadrupoles in measures of undulator period.

Position within a FODO cell, where GENESIS 1.3 starts the FODO cell lattice. To start with a full F-quadrupole set F1ST to zero while a value of FL/2 begins the cell in the middle of the focusing quadrupole.

Maximum transverse misplacement of the quadrupoles in x-direction. A random offset between [-,] in x is applied to every quadrupole. Quadrupole position errors are generated even if the magnetic field is defined by an external file.

Maximum transverse misplacement of the quadrupoles in y-direction, respectively. See QFDX for more information.

On-axis field strength of a superimposed solenoid field.

Length of solenoid field in measures of undulator period. The solenoid is aligned to the beginning of each undulator section.