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@ARTICLE{Tomin:587132,
      author       = {Tomin, Sergey and Kaiser, Jan and Lockmann, Nils Maris and
                      Wohlenberg, Torsten and Zagorodnov, Igor},
      title        = {{U}ndulator linear taper control at the {E}uropean
                      {X}-{R}ay {F}ree-{E}lectron {L}aser facility},
      journal      = {Physical review accelerators and beams},
      volume       = {27},
      number       = {4},
      issn         = {2469-9888},
      address      = {College Park, MD},
      publisher    = {American Physical Society},
      reportid     = {PUBDB-2023-04158},
      pages        = {042801},
      year         = {2024},
      abstract     = {Undulator tapering controls the resonance properties of the
                      Free-Electron Laser (FEL) amplification process. Energy
                      losses in an undulator, caused by synchrotron radiation and
                      wakefields within the undulator's vacuum chamber, determine
                      the undulator's linear taper. Synchrotron radiation
                      contribution can be calculated analytically, while
                      calculating wakefield energy loss necessitates a beam
                      current profile.We introduce a system for the automatic
                      estimation of wakefield energy loss, which leverages
                      non-invasive THz diagnostics, a current profile
                      reconstruction algorithm enhanced with machine learning, and
                      a recently developed analytical wakefield function for the
                      undulator beamline. The effectiveness of this approach was
                      validated by directly measuring wakefield-induced electron
                      beam energy loss in the European XFEL's undulator section.},
      cin          = {MXL / MPY / MVS / MSK},
      ddc          = {530},
      cid          = {I:(DE-H253)MXL-20160301 / I:(DE-H253)MPY-20120731 /
                      I:(DE-H253)MVS-20120731 / I:(DE-H253)MSK-20120731},
      pnm          = {621 - Accelerator Research and Development (POF4-621) /
                      6G13 - Accelerator of European XFEL (POF4-6G13)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-HGF)POF4-6G13},
      experiment   = {EXP:(DE-H253)XFEL(machine)-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001223197200003},
      doi          = {10.1103/PhysRevAccelBeams.27.042801},
      url          = {https://bib-pubdb1.desy.de/record/587132},
}