Speaker
Description
Many accelerator applications, including free-electron lasers and ultrafast electron diffraction, impose stringent requirements on beam energy and arrival-time stability. In linacs, these fluctuations are primarily driven by amplitude and phase variations in RF systems. Conventional jitter analysis typically relies on large ensembles of simulation runs, which are computationally expensive and offer limited insight into the individual contributions of different jitter sources. We present JitTrack, a fast tracking code for evaluating energy and arrival-time jitter in linacs based on a single-particle model. The method employs differential algebra to obtain the explicit dependence of final beam jitters on multiple jitter sources in a single simulation, for a given operating point. This approach enables rapid sensitivity analysis and direct identification of dominant contributors to beam instability. Benchmark results against particle-in-cell simulations demonstrate the accuracy and efficiency of the method.
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