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Title: Pulse Duration of Seeded Free-Electron Lasers

The pulse duration, and, more generally, the temporal intensity profile of free-electron laser (FEL) pulses, is of utmost importance for exploring the new perspectives offered by FELs; it is a nontrivial experimental parameter that needs to be characterized. We measured the pulse shape of an extreme ultraviolet externally seeded FEL operating in high-gain harmonic generation mode. Two different methods based on the cross-correlation of the FEL pulses with an external optical laser were used. The two methods, one capable of single-shot performance, may both be implemented as online diagnostics in FEL facilities. The measurements were carried out at the seeded FEL facility FERMI. The FEL temporal pulse characteristics were measured and studied in a range of FEL wavelengths and machine settings, and they were compared to the predictions of a theoretical model. Finally, the measurements allowed a direct observation of the pulse lengthening and splitting at saturation, in agreement with the proposed theory.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [1] ;  [1] ;  [1] ;  [4] ;  [5] ;  [6] ;  [1] ;  [7] ;  [1] ;  [8] ;  [9] ;  [10] ;  [1] more »;  [1] ;  [1] ;  [11] ;  [1] ;  [1] ;  [1] ;  [1] ;  [12] ;  [13] ;  [1] ;  [1] ;  [12] ;  [1] ;  [1] ;  [6] ;  [8] ;  [14] ;  [15] ;  [8] ;  [10] ;  [8] ;  [8] ;  [16] ;  [17] ;  [18] ;  [19] « less
  1. Elettra-Sincrotrone Trieste, Trieste (Italy)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Carl von Ossietzky Univ., Oldenburg (Germany); Hochschule Emden/Leer-Univ. of Applied Sciences, Emden (Germany)
  3. CNR-ISM, Trieste (Italy);Elettra-Sincrotrone Trieste, Trieste (Italy)
  4. Elettra-Sincrotrone Trieste, Trieste (Italy); Univ. of Nova Gorica, Nova Gorica (Slovenia)
  5. Univ. of Trieste, Trieste (Italy); Elettra-Sincrotrone Trieste, Trieste (Italy)
  6. Univ. of Gothenburg, Gothenburg (Sweden)
  7. Elettra-Sincrotrone Trieste, Trieste (Italy); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  8. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  9. Univ. of Trieste, Trieste (Italy); CNR-ISM, Trieste (Italy)
  10. Carl von Ossietzky Univ., Oldenburg (Germany); Hochschule Emden/Leer-Univ. of Applied Sciences, Emden (Germany)
  11. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Czech Academy of Sciences, Prague (Czech Republic)
  12. Helmholtz-Institut Jena, Jena (Germany); Class 5 Photonics GmbH, Hamburg (Germany)
  13. Elettra-Sincrotrone Trieste, Trieste (Italy); Swinburne Univ. of Technology, Melbourne (Australia); CNR-IOM, Trieste (Italy)
  14. Univ. la Sapienza, Roma (Italy); CNR-IOM, Trieste (Italy)
  15. Elettra-Sincrotrone Trieste, Trieste (Italy); Univ. of Trieste, Trieste (Italy)
  16. CNR-IOM, Trieste (Italy); Elettra-Sincrotrone Trieste, Trieste (Italy)
  17. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Polish Academy of Sciences, Krakow (Poland)
  18. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  19. ENEA, Frascati Roma (Italy); Elettra-Sincrotrone Trieste, Trieste (Italy)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review. X
Additional Journal Information:
Journal Volume: 7; Journal Issue: 2; Journal ID: ISSN 2160-3308
Publisher:
American Physical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS
OSTI Identifier:
1369340