Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 19: Interaction with VUV and X-ray light II

A 19.1: Vortrag

Dienstag, 19. März 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.