Streak Camera 101: Visualizing Charged-Particle Beam Dynamics

Bunch-resolved diagnostics for a future electron-storage ring

“…Dependent on the chosen configuration of the transfer-line mirrors (periscope optics), we may acquire either horizontal or vertical beam shapes vs. the time distribution of each spot (see, e.g., refs. [25][26][27][28][29] for non-destructive 2D analysis). The third parameter (the other transversal direction) may in principle be scanned sequentially using a motorcontrolled mirror.…”

“…Instead, they all detect different 2D distributions for time vs. each of the two lateral directions. Most systems enable also x vs. y detection (for large bunch separations), e.g., by reduction of the streaking effect at significantly lower streaking speeds [28]. With our high-repetition-rate sweeping electronics, we may use the latter method for the short bunches of the low-alpha mode, at the lowest timing resolution and by opening the streak-camera entrance-slit completely.…”

“…For closely spaced bunches, i.e., within the multi-bunch train, peak structures may overlap in the horizontal streak-camera direction due to the intrinsic resolution given by the Abbe limit, aberrations, the point-spread function and the encoded transversal-size information. The peak smearing and blending is counteracted by selecting a low time range for the horizontal scan axis (about 100 ns in Fig.5), to increase the horizontal bunch separation in the image.Dependent on the chosen configuration of the transfer-line mirrors (periscope optics), we may acquire either horizontal or vertical beam shapes vs. the time distribution of each spot (see, e.g., refs [25][26][27][28][29]. for non-destructive 2D analysis).…”

Beam Diagnostic Requirements: an Overview

“…Apart from the report in these proceedings [14], more information about streak cameras can be found e.g., in Refs. [276,277].…”