Lattice Model Calibration and Frequency Map Measurements at the ALS
نویسنده
چکیده
To understand the dynamics in an accelerator it is essential to have a good model representing its realistic lattice. One method used at the ALS to calibrate the linear (coupled) accelerator model is the analysis of orbit response matrices. Recently this method has been combined with frequency map techniques, both in tracking and experiment at the accelerator. Comparing the results of simulated and measured frequency maps shows how accurately the accelerator model describes the nonlinear beam dynamics. In addition measured frequency maps can serve as a model independent tool to evaluate the quality of a lattice. The measurements at the ALS clearly show the network of coupling resonances and the agreement with the simulation using the calibrated model is very good whereas the disagreement is large when using an ideal accelerator model.
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