%0 Journal Article
%A Ying, Jianwei
%A He, Xie
%A Su, Dace
%A Zheng, Lingbin
%A Kroh, Tobias
%A Rohwer, Timm
%A Fakhari, Moein
%A Kassier, Günther H.
%A Ma, Jingui
%A Yuan, Peng
%A Matlis, Nicholas H.
%A Kärtner, Franz X.
%A Zhang, Dongfang
%T High gradient terahertz-driven ultrafast photogun
%J Nature photonics
%V 18
%N 7
%@ 1749-4885
%C London [u.a.]
%I Nature Publ. Group
%M PUBDB-2024-04712
%P 758-765
%D 2024
%X Terahertz (THz)-based electron acceleration has potential as a technology for next-generation cost-efficient compact electron sources. Although proof-of-principle demonstrations have proved the feasibility of many THz-driven accelerator components, THz-driven photoguns with sufficient brightness, energy and control for use in demanding ultrafast applications have yet to be achieved. Here we present a novel millimetre-scale multicell waveguide-based THz-driven photogun that exploits field enhancement to boost the electron energy, a movable cathode to achieve precise control over the accelerating phase as well as multiple cells for exquisite beam control. The short driving wavelength enables a peak acceleration gradient as high as  3 GV m−1. Using microjoule-level single-cycle THz pulses, we demonstrate electron beams with up to  14 keV electron energy, 1
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001222564100001
%R 10.1038/s41566-024-01441-y
%U https://bib-pubdb1.desy.de/record/610878