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@ARTICLE{Manz:302028,
      author       = {Manz, Stephanie and Casandruc, Albert and Zhang, Dongfang
                      and Zhong, Yinpeng and Loch, Rolf A. and Marx, Alexander and
                      Hasegawa, Taisuke and Liu, Lai Chung and Bayesteh, Shima and
                      Delsim-Hashemi, Hossein and Hoffmann, Matthias and Felber,
                      Matthias and Hachmann, Max and Mayet, Frank and Hirscht,
                      Julian and Keskin, Sercan and Hada, Masaki and Epp, Sascha
                      W. and Flöttmann, Klaus and Miller, R. J. Dwayne},
      title        = {{M}apping {A}tomic {M}otions {W}ith {U}ltrabright
                      {E}lectrons: {T}owards {F}undamental {L}imits in
                      {S}pace-{T}ime {R}esolution},
      journal      = {Faraday discussions},
      volume       = {177},
      issn         = {1364-5498},
      address      = {Cambridge [u.a.]},
      publisher    = {Soc.},
      reportid     = {PUBDB-2016-03071},
      pages        = {467 - 491},
      year         = {2015},
      note         = {(c) The Royal Society of Chemistry},
      abstract     = {The long held objective of directly observing atomic
                      motions during the defining moments of chemistry has been
                      achieved based on ultrabright electron sources that have
                      given rise to a new field of atomically resolved structural
                      dynamics. This class of experiments requires not only
                      simultaneous sub-atomic spatial resolution with temporal
                      resolution on the 100 femtosecond time scale but also has
                      brightness requirements approaching single shot atomic
                      resolution conditions. The brightness condition is in
                      recognition that chemistry leads generally to irreversible
                      changes in structure during the experimental conditions and
                      that the nanoscale thin samples needed for electron
                      structural probes pose upper limits to the available sample
                      or “film” for atomic movies. Even in the case of
                      reversible systems, the degree of excitation and thermal
                      effects require the brightest sources possible for a given
                      space-time resolution to observe the structural changes
                      above background. Further progress in the field,
                      particularly to the study of biological systems and solution
                      reaction chemistry, requires increased brightness and
                      spatial coherence, as well as an ability to tune the
                      electron scattering cross-section to meet sample
                      constraints. The electron bunch density or intensity depends
                      directly on the magnitude of the extraction field for
                      photoemitted electron sources and electron energy
                      distribution in the transverse and longitudinal planes of
                      electron propagation. This work examines the fundamental
                      limits to optimizing these parameters based on relativistic
                      electron sources using re-bunching cavity concepts that are
                      now capable of achieving 10 femtosecond time scale
                      resolution to capture the fastest nuclear motions. This
                      analysis is given for both diffraction and real space
                      imaging of structural dynamics in which there are several
                      orders of magnitude higher space-time resolution with
                      diffraction methods. The first experimental results from the
                      Relativistic Electron Gun for Atomic Exploration (REGAE) are
                      given that show the significantly reduced multiple electron
                      scatteringproblem in this regime, which opens up micron
                      scale systems, notably solution phase chemistry, to
                      atomically resolved structural dynamics.},
      cin          = {MPSD},
      ddc          = {540},
      cid          = {I:(DE-H253)MPSD-20120731},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000353034300027},
      pubmed       = {pmid:25631530},
      doi          = {10.1039/C4FD00204K},
      url          = {https://bib-pubdb1.desy.de/record/302028},
}