Direct autocorrelation of soft-x-ray free-electron-laser pulses by time-resolved two-photon double ionization of He
Mitzner R, Sorokin AA, Siemer B, Roling S, Rutkowski M, Zacharias H, Neeb M, Noll T, Siewert F, Eberhardt W, Richter M, Juranic P, Tiedtke K, Feldhaus J
Research article (journal)Abstract
The pulse duration of soft x-ray free-electron laser (FEL) radiation is directly measured by time-resolved observation of doubly charged helium ions at 51.8 eV. A wave front splitting autocorrelator produces two correlated FEL pulses with a resolution of better than a femtosecond. In the interesting intensity range from 10(13) to 10(16) W/cm(2) direct and sequential double ionization contribute to the ion yield which has significant influence on the correlation width, being a general feature at high photon energies. Here, a duration of tau(L) = (29 +/- 5) fs is derived for the soft x-ray pulses at FLASH.
Details about the publication
Authors from the University of Münster
| Roling, Sebastian | Institute of Physics (PI) Workgroup Ultrafast Dynamics on Interfaces Experiment (Prof. Zacharias) |
| Siemer, Björn | Institute of Physics (PI) Workgroup Ultrafast Dynamics on Interfaces Experiment (Prof. Zacharias) |
| Zacharias, Helmut | Institute of Physics (PI) Center for Nonlinear Science Workgroup Ultrafast Dynamics on Interfaces Experiment (Prof. Zacharias) |
Promotionen, aus denen die Publikation resultiert
| Zeitaufgelöste Messungen mit ultrakurzen XUV-Pulsen des Freie-Elektronen-Lasers "FLASH" Candidate: Siemer, Björn | Supervisors: Zacharias, Helmut Period of time: 01/06/2006 - 11/07/2012 Doctoral examination procedure finished at: Doctoral examination procedure at University of Münster |