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@INPROCEEDINGS{Schneller:615333,
      author       = {Schneller, Lukas and Henn, Manuel and Spurk, Christoph and
                      Olowinsky, Alexander and Beckmann, Felix and Moosmann,
                      Julian and Holder, Daniel and Hagenlocher, Christian and
                      Graf, Thomas},
      title        = {{H}igh-speed {X}-ray imaging of bulge formation during
                      laser percussion drilling with various polarizations in
                      stainless steel},
      journal      = {Procedia CIRP},
      volume       = {124},
      issn         = {2212-8271},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2024-06091},
      pages        = {644-648},
      year         = {2024},
      abstract     = {Achieving high-quality and high-aspect-ratio micro holes
                      with ultrashort pulse laser percussion drilling remains a
                      challenge. Lateral extensions or bulges in dependence on the
                      polarization of the laser beam have so far only been
                      observed by analyzing metallographically prepared
                      cross-sections and the outlets of the holes. For the first
                      time, we present the use of in-situ synchrotron high-speed
                      X-ray imaging to quantitatively capture the time-resolved
                      growth of these bulges in metals. A laser with a pulse
                      duration of 1 ps and a wavelength of 1030 nm was used to
                      investigate the influence of linear and circular
                      polarization as well as the pulse energy on the shape and
                      orientation of the bulges at increasing depths during the
                      drilling process. The bulges were observed to form
                      perpendicular to the polarization at the start of the
                      drilling process. The observations from X-ray images were
                      confirmed by µCT images of the drilled samples.},
      month         = {Sep},
      date          = {2024-09-15},
      organization  = {13th CIRP Conference on Photonic
                       Technologies, Fürth (Germany), 15 Sep
                       2024 - 19 Sep 2024},
      cin          = {DOOR ; HAS-User / Hereon},
      ddc          = {670},
      cid          = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal:
                      BAG-20211050 (BAG-20211050) / DFG project
                      G:(GEPRIS)236616214 - SFB 1120: Bauteilpräzision durch
                      Beherrschung von Schmelze und Erstarrung in
                      Produktionsprozessen (236616214)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)BAG-20211050 /
                      G:(GEPRIS)236616214},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8},
      doi          = {10.1016/j.procir.2024.08.192},
      url          = {https://bib-pubdb1.desy.de/record/615333},
}