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A: Fachverband Atomphysik
A 19: Interaction with VUV and X-ray light II
A 19.1: Talk
Tuesday, March 19, 2013, 14:00–14:15, F 428
First direct seeding at FLASH — •Theophilos Maltezopoulos1, Sven Ackermann2, Armin Azima1, Sasa Bajt2, Joern Boedewadt1, Francesca Curbis1, Hossein Delsim-Hashemi1, Markus Drescher1, Stefan Duesterer2, Bart Faatz2, Matthias Felber2, Josef Feldhaus2, Eugen Hass1, Ulrich Hipp1, Katja Honkavaara2, Rasmus Ischebeck3, Shaukat Khan4, Tim Laarmann2, Christoph Lechner1, Velizar Miltchev1, Manuel Mittenzwey1, Marie Rehders1, Juliane Roensch-Schulenburg1, Joerg Rossbach1, Holger Schlarb2, Siegfried Schreiber2, Lasse Schroedter2, Michael Schulz1, Roxana Tarkeshian1, Markus Tischer2, and Marek Wieland1 — 1University of Hamburg and CFEL — 2DESY, Hamburg — 3PSI, Villigen, Switzerland — 4DELTA, Dortmund
Direct seeding with a high-harmonic generation source can improve the spectral, temporal, and coherence properties of a free-electron-laser (FEL) and reduces intensity- and arrival-time fluctuations. In the seeding experiment at the XUV-FEL in Hamburg, FLASH, which is normally operated in the self-amplified spontaneous emission mode, the 21st harmonic of an 800 nm laser is focused into a dedicated seeding undulator. The interaction with the relativistic electrons acts as an amplifier for the seed radiation. We present the setup of the seeding section of FLASH and first experimental results. This work is supported by the Federal Ministry of Education and Research in the framework of the FSP301 program.