Bonn 2010 – wissenschaftliches Programm
HK 68.6: Vortrag
Freitag, 19. März 2010, 15:20–15:35, HG ÜR 4
Temporal overlap of electron bunch and soft x-ray pulse at sFLASH — •Roxana Tarkeshian1, Armin Azima1, Joern Boedewadt1, Hossein Delsim-Hashemi1, Markus Drescher1, Stefan Duesterer2, Josef Feldhaus2, Katja Honkanavaara2, Rasmus Ischebeck3, Shaukat Khan4, Tim Laarmann2, Theophilos Maltezopoulos1, Atoosa Meseck5, Velizar Miltchev1, Manuel Mittenzwey1, Juliane Roensch1, Joerg Rossbach1, Holger Schlarb2, Siegfried Schreiber2, Michael Schulz1, and Marek Wieland1 — 1Hamburg University, Germany — 2DESY, Hamburg, Germany — 3PSI, Villigen, Switzerland — 4DELTA, TU Dortmund, Germany — 5Helmholtz-Zentrum Berlin, Berlin, Germany
sFLASH is a seeded free-electron Laser (FEL) experiment at DESY-Hamburg, which uses a High Harmonic Generation(HHG)-based XUV laser pulse, overlapping with the electron bunch at the entrance of the seeding undulators. The temporal overlap between the electron bunch (600fs FWHM) and the HHG pulse (30fs FWHM) is critical for the seeding. To ensure the overlap, the synchronization of the HHG drive laser (Lambda:800nm) and the incoherent undulator radiation is determined by using a streak camera. Afterwards interaction of HHG drive laser with the electron bunch will modulate the beam in the undulator. After a dispersive section this Inverse FEL modulated beam will produce coherent light on a screen or in the following undulator which proves the overlap of two beams. The enhancement of coherent light will be analyzed spectrally. The layout of the experiment and simulation results of generation and transport of both pulses are presented.