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Title: Focus characterization at an X-ray free-electron laser by coherent scattering and speckle analysis

X-ray focus optimization and characterization based on coherent scattering and quantitative speckle size measurements was demonstrated at the Linac Coherent Light Source. Its performance as a single-pulse free-electron laser beam diagnostic was tested for two typical focusing configurations. The results derived from the speckle size/shape analysis show the effectiveness of this technique in finding the focus' location, size and shape. In addition, its single-pulse compatibility enables users to capture pulse-to-pulse fluctuations in focus properties compared with other techniques that require scanning and averaging.
 [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1] ;  [1] ;  [4] ;  [4] ;  [4] ;  [4] ;  [4]
  1. SLAC National Accelerator Laboratory, Menlo Park, CA (United States)
  2. Germany
  3. Technische Universitat Dresden, Dresden (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
OSTI Identifier:
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 22; Journal Issue: 3; Journal ID: ISSN 1600-5775
International Union of Crystallography
Research Org:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Contributing Orgs:
Linac Coherent Light Source, SLAC National Accelerator Laboratory
Country of Publication:
United States
43 PARTICLE ACCELERATORS X-ray; FEL; speckle; focusing