High-charge ultrashort electron bunch generation by an energy chirping cell-attached rf electron gun and its measurement using a transverse deflecting cavity
التفاصيل البيبلوغرافية
العنوان:
High-charge ultrashort electron bunch generation by an energy chirping cell-attached rf electron gun and its measurement using a transverse deflecting cavity
Ultrashort electron bunches are becoming increasingly important for applications such as free-electron lasers, time-resolved electron diffraction/microscopy, and advanced accelerator concepts. We report femtosecond electron bunch generation with a unique rf gun and its precise measurement using a transverse deflecting cavity. A bunch length of $323\ifmmode\pm\else\textpm\fi{}13\text{ }\text{ }\mathrm{fs}$ with 120 pC ($\ensuremath{\sim}7.5\ifmmode\times\else\texttimes\fi{}{10}^{8}\text{ }\text{ }\mathrm{electrons}$) was achieved at a distance of just 3 m from the cathode. A longitudinal phase space distribution was also achieved, and we successfully experimentally confirmed the linearly energy chirped electron bunch generation and self-compression by the velocity difference.
