Schiwietz, G.; Koopmans, M.; Kalus, C.; Marongiu, M.; Schälicke, A.; Schnizer, P.; Ries, M.: Approaching an optimum time resolution for synchroscan streak-camera measurements with visible synchrotron light. Nuclear Instruments & Methods in Physics Research A 1062 (2024), p. 169196/1-13
10.1016/j.nima.2024.169196
Open Access Version
Abstract:
The optical beam diagnostics at the BESSY II light source in Berlin have been improved significantly over the last few years. In particular, the streak-camera system has been extended in precision and sensitivity to allow two-dimensional imaging in time and space for equilibrated and non-equilibrated bunch patterns. In this paper, we prove experimentally and theoretically that we have reached a sub-ps RMS total time resolution using filtered synchrotron light. Detailed simulations, including the different physical time-dispersion mechanisms, show the influence of various band-pass and edge wavelength filters on the resolution. The limits for unfiltered near-visible synchrotron radiation (white-light) and the band-pass filter to achieve optimal time resolution are derived as well, providing a basis for more advanced beam-dynamics studies in the near future.