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@INPROCEEDINGS{Wood:642928,
      author       = {Wood, Jonathan Christopher and Beinortaite, Judita and
                      Björklund Svensson, Jonas Halfdan and Boulton, Lewis
                      Anthony and Boyle, Gregory James and Burghart, Philipp and
                      Cowley, James and D'Arcy, Richard and Diaz Pacheco, Juan
                      Pablo Jose and Ferran Pousa, Angel and Foster, Brian and
                      Garland, Matthew James and Gonzalez Caminal, Pau and
                      Hohmann, Marcel Stefan and Huck, Maryam and Jones, Harry and
                      Kanekar, Advait and Kornilov, Oleg and Krivkova, Anna and
                      Lindstroem, Carl Andreas and Loisch, Gregor and Long,
                      Tianyun and Maier, Andreas and Mewes, Steven Mathis and
                      Müller, Lukas and Najmudin, Ibrahim and Osterhoff, Jens and
                      Parikh, Trupen and Pena Asmus, Felipe Lars and Samoilenko,
                      Dmitrii and Schröder, Sarah and Schultess, Ivo and
                      Schuette, Bernd and Svirplys, Evaldas and Thévenet, Maxence
                      and Thomas, J and Vrakking, Marc and Wesch, Stephan and
                      Wing, Matthew},
      title        = {{L}atest {R}esults from the {FLASHF}orward {E}xperiment},
      school       = {DESY},
      reportid     = {PUBDB-2025-05724},
      year         = {2025},
      abstract     = {The FLASHForward experiment at DESY uses high-quality
                      electron bunches from the FLASH linac to perform fundamental
                      plasma-wakefield-accelerator research. An overview of recent
                      results will be provided in three areas: beam-quality
                      preservation, energy efficient acceleration and
                      repetition-rate limits. By precisely controlling the
                      transverse properties of the witness bunch we demonstrate
                      the preservation of the witness-bunch emittance εn during
                      plasma acceleration for the first time. εn was preserved at
                      2.8 mm-mrad while maintaining > $20\%$ instantaneous
                      energy-transfer efficiency. To improve the overall
                      energy-transfer efficiency, the acceleration distance must
                      be increased. We will present the design and development of
                      a new discharge plasma source which allowed us to accelerate
                      a 1.2 GeV witness bunch by more than 0.5 GeV with
                      per-cent-level energy spread. To further improve bunch
                      quality, we have incorporated Bayesian optimisation
                      techniques into our workflow and have demonstrated 0.25 GeV
                      energy gain with < $0.2\%$ energy spread. Finally, we
                      further studied the ultimate repetition rate of plasma
                      accelerators, which can be limited by secondary ionisation
                      over tens or hundreds of nanoseconds driven by the hot
                      plasma species left after the wakefield interaction.},
      month         = {Sep},
      date          = {2025-09-21},
      organization  = {7th European Advanced Accelerator
                       Conference, Elba (Italy), 21 Sep 2025 -
                       27 Sep 2025},
      cin          = {MPL / $HH_FH_FTX_AS$},
      cid          = {I:(DE-H253)MPL-20120731 /
                      $I:(DE-H253)HH_FH_FTX_AS-20210421$},
      pnm          = {621 - Accelerator Research and Development (POF4-621) / 6G2
                      - FLASH (DESY) (POF4-6G2)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-HGF)POF4-6G2},
      experiment   = {EXP:(DE-H253)FLASHForward-20150101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://bib-pubdb1.desy.de/record/642928},
}