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Title: Time-resolved x-ray imaging of a laser-induced nanoplasma and its neutral residuals

The evolution of individual, large gas-phase xenon clusters, turned into a nanoplasma by a high power infrared laser pulse, is tracked from femtoseconds up to nanoseconds after laser excitation via coherent diffractive imaging, using ultra-short soft x-ray free electron laser pulses. A decline of scattering signal at high detection angles with increasing time delay indicates a softening of the cluster surface. Here we demonstrate, for the first time a representative speckle pattern of a new stage of cluster expansion for xenon clusters after a nanosecond irradiation. The analysis of the measured average speckle size and the envelope of the intensity distribution reveals a mean cluster size and length scale of internal density fluctuations. Furthermore, the measured diffraction patterns were reproduced by scattering simulations which assumed that the cluster expands with pronounced internal density fluctuations hundreds of picoseconds after excitation.
 [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [2] ;  [2] ;  [4] ;  [2] ;  [3] ;  [5] ;  [6] ;  [7] ;  [6] ;  [6] ;  [2]
  1. Technische Univ. Berlin, Berlin (Germany); LaTrobe Univ., Melbourne (Australia)
  2. Technische Univ. Berlin, Berlin (Germany)
  3. Technische Univ. Berlin, Berlin (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Technische Univ. Berlin, Berlin (Germany); European XFEL GmbH, Hamburg (Germany)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  6. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Institute of Mineralogy, Paris (France)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
05K10KT2; AC02-76SF00515
Accepted Manuscript
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 18; Journal Issue: 4; Journal ID: ISSN 1367-2630
IOP Publishing
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States