The storage ring linear optics debugging code LOCO (Linear Optics from Closed Orbits) [1] has been rewritten in MATLAB and linked to the accelerator modeling code AT [2]. LOCO uses the measured orbit response matrix to determine normal and skew quadrupole gradients. A MATLAB GUI provides a greatly improved user interface with graphical display of the fitting results. The option of including the shift in orbit with rf-frequency in the orbit response matrix has been added so that the model is adjusted to match the measured dispersion.This facilitates control of the horizontal dispersion, which is important for achieving small horizontal emittance. Also included are error bar calculation, outlier data rejection, accommodation of single-view BPMs (beam position monitors), and the option of including coupling in the fit. The code was written to allow the flexibility of linking it to other accelerator modeling codes.

No abstract

No abstract

No abstract

No abstract