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@INPROCEEDINGS{Kierspel:393098,
      author       = {Kierspel, Thomas and Trippel, Sebastian and Küpper,
                      Jochen},
      title        = {{P}hotophysics and diffractive imaging of controlled
                      gas-phase molecules},
      school       = {Elettra - Sincrotrone Trieste S.C.p.A.},
      reportid     = {PUBDB-2017-11253},
      year         = {2017},
      abstract     = {The understanding of the temporal evolution of a molecular
                      systems on the atomic level is typically described by the
                      term molecular movie. Recording of a full time- resolved
                      molecular movie requires a temporal resolution in the order
                      of femtoseconds and a spatial resolution of picometers. The
                      control of gas-phase molecules can be highly advantageous or
                      simply necessary for the recording of such a movie. Here,
                      “control“ refers to the spatial separation of different
                      quantum states, conformers, or clusters, and the alignment
                      or orientation of the molecular axes in space. We present
                      two experiments which are utilizing the different types of
                      control, i.e., spatial separation and alignment, as a
                      preparation step for the recording of such a molecular
                      movie.At first, the photophysics of spatially separated
                      indole, and indole-water1 clusters, i.e., indole
                      ‘solvated’ by a single water molecule, will be
                      discussed. The spatial separation allowed to purify the
                      indole-water1 clusters, which were otherwise hidden in the
                      soup of different generated clusters, to study the influence
                      of the hydrogen- bonded water on the photofragmentation of
                      indole. Photofragmentation was induced by side specific 1s
                      core hole ionization of the indole’s nitrogen or carbon
                      atom. Emitted electrons and ionic fragments were recorded in
                      coincidence, and the different fragmentation channels of the
                      different species will be discussed.Strongly aligned
                      molecules were used to image gas-phase molecules with atomic
                      resolution via diffractive imaging, which is a promising
                      tool to unravel ultrafast molecular dynamics [3,4], such as
                      isomerization, folding, or photofragmentation. Here,
                      2,5-diiodothiophene molecules were laser-aligned in the
                      so-called ‘intermediate regime’ between adiabatic and
                      impulsive alignment [5]. The laser pulses had a pulse
                      duration of 94 ps and were provided by a Ti:Sapphire laser
                      system. The strongly aligned molecules were probed by (hard)
                      x-ray radiation (9.5 keV) provided by the Linac Coherent
                      Light Source (LCLS). The alignment procedure as well as the
                      outcome of the experiment will be discussed.[1] Trippel,
                      Chang, Stern, Mullins, Holmegaard, Küpper, Phys. Rev. A.
                      86, 033202 (2012) [2] Chang, Horke, Trippel, Küpper, Int.
                      Rev. Phys. Chem. 34(4), 557-590 (2015)[3] Küpper et al. (53
                      authors), Phys. Rev. Lett. 122(8), 083002 (2014)[4] Barty,
                      Küpper, Chapman, Ann. Rev. Phys. Chem. 64(1), 415-435
                      (2013)[5] Kierspel et al. (30 authors), J. Phys. B. 48(20),
                      204002 (2015)},
      organization  = {(Italy)},
      subtyp        = {Other},
      cin          = {FS-CFEL-1 / FS-CFEL-CMI / UNI/CUI / UNI/EXP},
      cid          = {I:(DE-H253)FS-CFEL-1-20120731 /
                      I:(DE-H253)FS-CFEL-CMI-20220405 /
                      $I:(DE-H253)UNI_CUI-20121230$ /
                      $I:(DE-H253)UNI_EXP-20120731$},
      pnm          = {6211 - Extreme States of Matter: From Cold Ions to Hot
                      Plasmas (POF3-621) / CUI - Hamburger Zentrum für
                      ultraschnelle Beobachtung (194651731) / VH-VI-419 - Dynamic
                      Pathways in Multidimensional Landscapes (VH-VI-419)},
      pid          = {G:(DE-HGF)POF3-6211 / G:(GEPRIS)194651731 /
                      G:(DE-HGF)VH-VI-419},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://bib-pubdb1.desy.de/record/393098},
}