@misc{oai:repo.qst.go.jp:00083834,
 author = {HUANG, KAI and Hideyuki, Kotaki and Michiaki, Mori and Timur, Esirkepov and Kevin Koga, James and Yukio, Hayashi and Nobuhiko, Nakanii and Jin, Zhan and Tomonao, Hosokai and Masaki, Kando and HUANG, KAI and Hideyuki, Kotaki and Michiaki, Mori and Timur, Esirkepov and Kevin Koga, James and Yukio, Hayashi and Nobuhiko, Nakanii and Jin, Zhan and Tomonao, Hosokai and Masaki, Kando},
 month = {Nov},
 note = {High power laser-driven electron sources [1,2], with their inherent ultrafast character, are considered to have potentials for applications in fast ignition [3], pump-probe study [4], and the construction of a table-top x-ray free-electron laser (XFEL) [5]. For such applications, the timing jitter and the bunch duration of the electron bunches are important parameters that are barely investigated experimentally.
We established electro-optic sampling techniques [6] adequate for the diagnostics of electron temporal information in laser wakefield acceleration (LWFA) [2]. For the investigation of electron timing jitter and injection process, electro-optic spatial decoding (EOSD) on the electron Coulomb field was performed. The spherical wavefront of the Coulomb field and plasma-density-dependent electron emission timing were discovered [7,8,9]. For the determination of electron bunch durations, EOSD on the coherent transition radiation (CTR) produced when electrons passing through a metal foil was conducted. An electron beam peak current up to 10 kA was demonstrated.
This research not only showed the capability of EO sampling serving as a real-time electron temporal diagnostic for laser-driven sources but also demonstrated the ultra-fast and high-brightness nature of laser-driven electron sources for various applications., The 30th International Toki Conference on Plasma and Fusion Research},
 title = {Temporal characterization of laser driven ultrafast electron bunches via electro-optic sampling},
 year = {2021}
}