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@ARTICLE{Zhang:435480,
      author       = {Zhang, Dongfang and Fakhari, Moein and Cankaya, Huseyin and
                      Calendron, Anne-Laure and Matlis, Nicholas and Kärtner,
                      Franz},
      title        = {{C}ascaded multi-cycle terahertz driven ultrafast electron
                      acceleration and manipulation},
      journal      = {Physical review / X},
      volume       = {10},
      number       = {1},
      issn         = {2160-3308},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2020-00667},
      pages        = {011067},
      year         = {2020},
      abstract     = {Terahertz (THz)-based electron acceleration and
                      manipulation has recently been shown to be feasible and to
                      hold tremendous promise as a technology for the development
                      of next-generation, compact electron sources. Previous work
                      has concentrated on structures powered transversely by
                      short, single-cycle THz pulses, with mm-scale, segmented
                      interaction regions that are ideal for acceleration of
                      electrons in the sub- to few-MeV range where electron
                      velocities vary significantly. However, in order to extend
                      this technology to the multi-MeV range, investigation of
                      approaches supporting longer interaction lengths is needed.
                      Here, we demonstrate first steps in electron acceleration
                      and manipulation using dielectrically-lined waveguides
                      powered by temporally long, narrowband, multi-cycle THz
                      pulses that co-propagate with the electrons. This geometry
                      offers centimeter-scale single stage interaction lengths and
                      offers the opportunity to further increase interaction
                      lengths by cascading acceleration stages that recycle the
                      THz energy and rephase the interaction. We prove the
                      feasibility of THz-energy recycling for the first time by
                      demonstrating acceleration, compression and focusing in two
                      sequential Al2O3-based dielectric capillary stages powered
                      by the same multi-cycle THz pulse. Since the multi-cycle THz
                      energy achievable using laser-based sources is currently a
                      limiting factor for the maximum electron acceleration,
                      recycling the THz pulses provides a key factor for reaching
                      relativistic energies with existing sources and paves the
                      way for applications in future ultrafast electron
                      diffraction and free-electron lasers.},
      cin          = {CFEL-UFOX / FS-CFEL-2},
      ddc          = {530},
      cid          = {I:(DE-H253)CFEL-UFOX-20160927 /
                      I:(DE-H253)FS-CFEL-2-20120731},
      pnm          = {631 - Accelerator R $\&$ D (POF3-631) / AXSIS - Frontiers
                      in Attosecond X-ray Science: Imaging and Spectroscopy
                      (609920) / DFG project 390715994 - EXC 2056: CUI: Advanced
                      Imaging of Matter (390715994) / DFG project 194651731 - EXC
                      1074: Hamburger Zentrum für ultraschnelle Beobachtung
                      (CUI): Struktur, Dynamik und Kontrolle von Materie auf
                      atomarer Skala (194651731) / ACHIP - Laser Accelerators on a
                      Chip $(ACHIP_2015-10-01)$},
      pid          = {G:(DE-HGF)POF3-631 / G:(EU-Grant)609920 /
                      G:(GEPRIS)390715994 / G:(GEPRIS)194651731 /
                      $G:(DE-HGF)ACHIP_2015-10-01$},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000619254700001},
      doi          = {10.1103/PhysRevX.10.011067},
      url          = {https://bib-pubdb1.desy.de/record/435480},
}