Speaker
Description
Terahertz (THz) streaking is a powerful technique for ultrafast longitudinal diagnosis of relativistic electron beams, as THz pulses generated via optical rectification are intrinsically synchronized to the driving laser and exhibit wavelengths well matched to the characteristic phase-space dimensions of relativistic electron bunches. However, the temporal resolution of THz streaking is often constrained to the femtosecond-level by the available THz pulse energy and the efficiency of the THz-electron interaction. Here we introduce a high-efficiency THz streaking scheme and the corresponding experiments conducted at the FORTRESS (Facility Of Relativistic Time-Resolved Electron Source and Scattering) beamline of Tsinghua University. Using single-cycle THz pulses with only a few microjoules of energy, the measurement precisions of 100 as level for bunch length and 10 as level for arrival time have been achieved. These results demonstrate the potential of THz streaking as a practical attosecond-level diagnosis tool for the next-generation ultrafast electron beam facilities.
| Working group | WG5 |
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