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@PHDTHESIS{Music:626053,
      author       = {Music, Valerija},
      othercontributors = {Ehresmann, Arno and Ilchen, Markus},
      title        = {{T}owards the investigation of ultrafast dynamics in chiral
                      systems using free-electron lasers},
      school       = {University of Kassel},
      type         = {Dissertation},
      reportid     = {PUBDB-2025-01275},
      pages        = {156},
      year         = {2024},
      note         = {Dissertation, University of Kassel, 2024},
      abstract     = {Chiral molecules are life’s building blocks, making the
                      study of their ultrafast processes a pursuit across various
                      fundamental research fields. The results presented in this
                      dissertation contain methodological, technical and
                      scientific advancements that pave the way for future
                      time-resolved, site-specific investigations into chiral
                      photochemistry of randomly orientated molecules, using
                      photoelectron circular dichroism and free-electron lasers.
                      The high-repetitionrate free-electron lasers EuXFEL and
                      FLASH2 will soon deliver undulatorbased circularly polarized
                      pulses, opening new avenues for chiral studies. The
                      EuXFEL’s instrumentation and applicability for chiral
                      studies are presented based on the first performed
                      experiments at the SQS endstation. The ultrafast
                      spectroscopy technique of velocity map imaging and its
                      suitability to measure the angular distribution of
                      photoelectrons and ions in experiments targeting ultrafast
                      dynamics is presented in detail. The double-sided velocity
                      map imaging spectrometer, which was built and commissioned
                      in the frame of this work, is presented, including technical
                      details, and its simulated and experimentally retrieved
                      performance. Inside into a performed study combining
                      free-electron lasers and double-sided velocity map imaging
                      spectroscopy, in the light of chiral perspectives, is given
                      via the performed and here-presented experiment at FLASH1.
                      Here, highly intense XUV pulses 63 eV and 75 eV, addressing
                      the neutral and singly charged iodine 4d edge respectively,
                      were used to probe the optical laser-induced fragmentation
                      of the prototypical chiral molecule 1-iodo-2-methyl-butane
                      (C5H11I) in a pump-probe scheme using 267nm and 800nm
                      pulses. For charged Coulombic interaction of dissociating
                      photofragments, the optical-laser-pump FEL-probe scans
                      revealed that the molecule dissociates significantly slower
                      with an 800nm pump than with a 267nm pump. The results show
                      substantial wavelength and intensity dependence for the
                      dissociation dynamics of this prototypical chiral molecule.
                      In addition, electron-ion partial covariance imaging was
                      demonstrated and enabled isolating the I 4d atomic and
                      molecular levels. The outcomes of this dissertation provide
                      a basis for future time-resolving investigations of chiral
                      systems using free-electron lasers.},
      keywords     = {free-electron laser (Other) / chirality studies (Other) /
                      iodomethylbutane (Other) / pump-probe experiments (Other) /
                      VMI spectroscopy (Other) / mass spectroscopy (Other) /
                      Massenspektroskopie (Other) / Pump-Probe-Technik (Other) /
                      Chirale Verbindungen (Other) / Freie-Elektronen-Laser
                      (Other)},
      cin          = {FS DOOR-User},
      ddc          = {530},
      cid          = {$I:(DE-H253)FS_DOOR-User-20241023$},
      pnm          = {6G2 - FLASH (DESY) (POF4-6G2) / PHGS, VH-GS-500 - PIER
                      Helmholtz Graduate School $(2015_IFV-VH-GS-500)$ / DFG
                      project G:(GEPRIS)328961117 - SFB 1319: Extremes Licht zur
                      Analyse und Kontrolle molekularer Chiralität (ELCH)
                      (328961117)},
      pid          = {G:(DE-HGF)POF4-6G2 / $G:(DE-HGF)2015_IFV-VH-GS-500$ /
                      G:(GEPRIS)328961117},
      experiment   = {EXP:(DE-H253)F-BL1-20150101},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.17170/KOBRA-202404159988},
      url          = {https://bib-pubdb1.desy.de/record/626053},
}