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@ARTICLE{Gang:622840,
      author       = {Gang, Seung-gi and Jung, Ekaterina and Matlis, Nicholas and
                      Stojanovic, Nikola and Pan, Rui},
      title        = {{L}aser-free and low-jitter {E}lectro-{O}ptic {S}ampling of
                      {FEL}-based {TH}z radiation by intrinsic ultrafast
                      laserlike-pulses at {FLASH}},
      journal      = {Infrared physics $\&$ technology},
      volume       = {151},
      issn         = {1350-4495},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PUBDB-2025-00520},
      pages        = {106121},
      year         = {2025},
      note         = {Dr. Ulrike Frühling at FLASH served as an internal
                      reviewer for the manuscript, and the review report is
                      attached.Submission deadline is by 01.02.2025.},
      abstract     = {The FLASH1 THz beamline at DESY produces intense multicycle
                      THz undulator radiation, along with quasi-single cycle edge
                      radiation. Characterizing the temporal profile of THz
                      radiation generated by free-electron lasers (FELs) is
                      challenging due to unavoidable timing jitter between the THz
                      pulse and an external laser synchronized to the FEL master
                      clock. Although Electro-Optic Sampling (EOS) is a powerful
                      diagnostic technique for the FEL THz sources, this jitter
                      limits the temporal resolution and spectral bandwidth,
                      necessitating timing jitter correction. To address this, we
                      introduce a laser-free and low-jitter diagnostic method,
                      Afterburner EOS (ABEOS), which uses broadband
                      laserlike-pulses generated with the THz radiation as a
                      probe. ABEOS results demonstrate good consistency with
                      simulations across two probe configurations: a sequence of
                      10 pulses and a single pulse. Furthermore, comparisons with
                      conventional methods of scanning EOS with an external laser,
                      single-shot EOS (SSEOS), and FTIR show strong and reliable
                      agreement. This technique offers ’laser-free and
                      low-jitter’ THz waveform characterization as a simplified,
                      accurate, and reliable alternative to conventional THz
                      diagnostics, validated up to 2 THz with potential for
                      application at higher frequencies.},
      month         = {Oct},
      date          = {2024-10-07},
      organization  = {12th international workshop on
                       infrared microscopy and spectroscopy
                       with accelerator-based sources (WIRMS
                       2024), Barcelona (Spain), 7 Oct 2024 -
                       11 Oct 2024},
      cin          = {FS-FLASH-B / DOOR ; HAS-User},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-FLASH-B-20160930 /
                      I:(DE-H253)HAS-User-20120731},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / 6G2 - FLASH (DESY) (POF4-6G2)},
      pid          = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G2},
      experiment   = {EXP:(DE-H253)F-ThzBL-20150101},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)16},
      doi          = {10.1016/j.infrared.2025.106121},
      url          = {https://bib-pubdb1.desy.de/record/622840},
}