BESSY is operating Europe’s largest third generation synchrotron radiation user facility for the VUV and Soft X-Ray range. For this presentation special emphasis will be placed upon introducing the BESSY FEL project. BESSY is planning to build a Soft X-Ray FEL facility covering the photon energy range from 24 eV to 1 keV at the site next to the existing BESSY II storage ring.  This second generation FEL facility will offer laser like photon beams with fully coherent, high power (mJ) pulses of  ≤20 fs duration, enabling a whole set of novel experiments dedicated to understand dynamical processes in matter or for the investigations of very dilute systems. Complementary to the SASE FEL facilities such as FLASH or LCLS, the pulses will be generated in a HGHG scheme (High Gain Harmonic Generation) which offers controlled, reproducible pulses as determined by the external seed UV (430-230 nm) laser pulse. Additionally this scheme allows for an inherent synchronization for pump-probe investigations. The HGHG-FEL covers the traditional BESSY II photon energy range, which is especially suited for electronic structure investigations of atoms, molecules, clusters, and solids. With the anticipated temporal resolution of ≤ 20 fs charge transfer processes and time resolved  ‘femtochemistry’ studies as well as magnetization dynamics in magnetic materials establish some of the major areas of scientific interest in this new facility. Furthermore, in exploiting the coherence of the photon pulses in microscopy applications it is possible to acquire an image with about 10nm resolution using a single laser pulse. Thus, for example, stroboscopic time resolved images of dynamical processes in living cells can be recorded.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/12622 must be provided.

1. Electron Dynamics in magnetic Nanostructures
2. Photon-in photon-out soft X-ray spectroscopy for the study of electronic properties in nanostructured materials: advantages and problems.
3. Electronic structure and chemical environment of Si nanoclusters embedded in a SiO₂ matrix.
4. Electronic structure of the subnanometer diameter MoS2 single wall nanotubes