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[en] Recent advances in linear accelerators, new developments in laser driven low-emittance electron guns, and the feasibility of ultra-precise long undulators open up the exciting possibility of building single pass Free Electron Laser (FELS) based on self-amplified spontaneous emission (SASE). These FELS promise to provide extremely intense, polarised ultra-short pulse radiation for the VUV and x-ray regimes. In addition their high peak and average brilliance, the tunability of the photon energy and the lateral coherence of the radiation will make the FELS to unique sources. World wide several projects for VUV and x-ray FELS have been initiated. At the Deutsches Elektronen-Synchrotron DESY (Hamburg) a VUV - FEL is under construction and tests of a first stage are under way. In order to extend the photon energy range up to approximately 12 keV several XFELS will be integrated into a 500 GeV e+e- linear collider planed at DESY. The principle of operation and the components of FELS based on SASE will be discussed in context with the VUV and XFELS projects. Schemes to overcome the statistical fluctuations and to increase the longitudinal coherence will be presented examples for basic and applied research with the FELS will be given. (author)
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Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Prague (Czech Republic); International Radiation Physics Society (International Organisation without Location); 340 p; ISBN 80-01-02180-7; 
; 2000; p. 56; 8. international symposium on radiation physics (ISRP-8); Prague (Czech Republic); 5-9 Jun 2000; Also available on CD-ROM, data in PDF format for the Acrobat Reader; contact: Professor L. Musilek, Faculty of Nuclear Sciences and Physical Engineering, Brehova ul., CZ-11519 Prague 1, e-mail: musilek@br.fjfi.cvut.cz. In addition, the file can be downloaded from the web site: www.fjfi.cvut.cz/ISRP-8.htm; The abstract in the publication is identical with that reproduced below
; 2000; p. 56; 8. international symposium on radiation physics (ISRP-8); Prague (Czech Republic); 5-9 Jun 2000; Also available on CD-ROM, data in PDF format for the Acrobat Reader; contact: Professor L. Musilek, Faculty of Nuclear Sciences and Physical Engineering, Brehova ul., CZ-11519 Prague 1, e-mail: musilek@br.fjfi.cvut.cz. In addition, the file can be downloaded from the web site: www.fjfi.cvut.cz/ISRP-8.htm; The abstract in the publication is identical with that reproduced below