Turnplot-a graphical tool for analyzing tracking data

An interactive graphical interface for exploring turn-by-turn data is presented. A variety of plots are available, not only the traditional phase space plots and Fourier transforms, but also plots of tune as a function of amplitude and of tunes on a resonance diagram so that resonance-crossing is easily diagnosed. Multiple particles and groups of particles can be plotted together or separately, and synchrotron sidebands can be identified in data that includes synchrotron oscillations. The program is written in C++, and is designed to make it relatively easy to accommodate different tracking data formats. The Turnplot is found to be a useful tool in dynamic aperture studies, since it gives insight into the reasons for particle loss.<>