Bernd Steffen

TL;DR: In this paper, the performance of a free-electron laser operating at a wavelength of 13.7 nm where unprecedented peak and average powers for a coherent extreme-ultraviolet radiation source have been measured.

TL;DR: In this article, the authors dealt with TTF/FLASH in the XFEL context, general layout of the X-FEL facility, the X FEL accelerator, undulators for SAES and spontaneous emission, infrastructure and auxiliary systems, commissioning and operation, project management and organization, cost and time schedule.

TL;DR: The European XFEL as discussed by the authors is a hard X-ray free-electron laser (FEL) based on a highelectron-energy superconducting linear accelerator, which allows for the acceleration of many electron bunches within one radio-frequency pulse of the accelerating voltage and, in turn, for the generation of a large number of hard Xray pulses.

TL;DR: In this article, a simulation code has been written to understand the faithfulness and the limitations of electron bunch shape reconstruction by electro-optic sampling in order to understand how to determine the time profile of ultrashort relativistic electron bunches.

TL;DR: In this paper, an extension of FLASH with a second undulator line and self-amplified spontaneous emission (SASE) is demonstrated in both FELs simultaneously.