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@INPROCEEDINGS{Schrder:463084,
      author       = {Schröder, Sarah and Lindstroem, Carl Andreas and Bohlen,
                      Simon and Boulton, Lewis and Boyle, Gregory James and
                      D'Arcy, Richard and Ossa, Alberto de la and Chappell, James
                      and Diederichs, Severin and Garland, Matthew James and
                      Gonzalez Caminal, Pau and Knetsch, Alexander and Loisch,
                      Gregor and Poder, Kristjan and Schaper, Lucas and Schmidt,
                      Bernhard and Sheeran, Bridget and Tauscher, Gabriele and
                      Wesch, Stephan and Wood, Jonathan Christopher and Zemella,
                      Johann and Osterhoff, Jens},
      title        = {{P}recision control of plasma wakefields for highly
                      efficient and energy-spread-preserving electron
                      acceleration},
      reportid     = {PUBDB-2021-03640},
      year         = {2021},
      abstract     = {Plasma-wakefield accelerators driven by intense particle
                      beams promise to significantly reduce the size of future
                      high-energy facilities. These applications require an
                      energy-efficient acceleration process with a well-controlled
                      energy spectrum, both of which can be achieved
                      simultaneously by tailoring the plasma wakefield.
                      Prerequisite for such control of the wakefield is its
                      precise measurement. Here we discuss a new measurement
                      technique that enables femtosecond-level sampling of the
                      longitudinal electric fields and that is particularly
                      powerful due to its operational simplicity. Using this
                      method, we experimentally demonstrated optimal beamloading
                      in a nonlinear electron-driven plasma accelerator by
                      wakefield flattening at the few-percent level. Bunches were
                      accelerated at a gradient of 1.3  GV/m and with an
                      energy-transfer efficiency of $(42±4)\%$ while preserving
                      per-mille energy spreads with full charge coupling. These
                      results open the door to high-quality operation of future
                      plasma accelerators through precise control of the
                      acceleration process.},
      month         = {May},
      date          = {2021-05-24},
      organization  = {12th International Particle
                       Accelerator Conference, IPAC2021,
                       Campinas (Brazil), 24 May 2021 - 28 May
                       2021},
      subtyp        = {Invited},
      cin          = {$HH_FH_FTX_AS$},
      cid          = {$I:(DE-H253)HH_FH_FTX_AS-20210421$},
      pnm          = {621 - Accelerator Research and Development (POF4-621) / PWA
                      - Research group for plasma-based accelerators
                      (PWA-20150304)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-H253)PWA-20150304},
      experiment   = {EXP:(DE-H253)FLASHForward-20150101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://bib-pubdb1.desy.de/record/463084},
}