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- W2558479086 abstract "The European X-ray Free-Electron laser Facility (XFEL) is going to be built in an international collaboration at the Deutsches Elektronen-Synchrotron (DESY), Germany, The Technical Design Report [1] was published recently. The official project is expected for early 2007. The new facility will offer photon beams at wavelengths as short as 1 Angstroem with highest peak brilliance being more than 100 million times higher than present day synchrotron radiation sources. The radiation has a high degree of transverse coherence and the pulse duration is reduced from ~100 picoseconds (typ. for SR light sources) down to the ~10 femtosecond time domain. The overall layout of the XFEL will be described. This includes the envisaged operation parameters for the linear accelerator using superconducting TESLA technology. The complete design is based on the actually operated VUV free-electron laser at DESY. Experience with the operation during first long user runs will be described in detail. Various subsystems of the XFEL could be tested. Specially developed electron beam diagnostics was commissioned. A summary of the status of the XFEL preparation work will be given. HISTORY OF THE TTF/VUV-FEL (FLASH) AND THE XFEL The basic technology underlying the European X-ray Free-Electron Laser Facility is the superconducting linear accelerator technology, developed by an international collaboration coordinated by the DESY laboratory in Hamburg, with the initial objective to create TESLA (Tera-Electronvolt Superconducting Linear Accelerator), an electron-positron linear collider with TeV energy, for particle physics studies, hence the name TESLA technology. It was soon realized that this type of innovative linear accelerator had ideal characteristics for an X-ray free-electron laser. Proposals to build a freeelectron laser, first as a side branch of the linear collider, and later as a stand-alone facility were put forward by DESY to the German government. The construction of a test facility (TESLA Test Facility 1, or TTF1) was undertaken, and lasing down to ~90 nm wavelengths was successfully demonstrated in 2000. TTF2 had the more ambitious goal to push lasing to 6 nm wavelengths, with a 1 GeV linear accelerator. This should be achieved in 2007; in the meantime, acceleration of electrons up to 0.75 GeV has obtained lasing at 32 nm (Jan. 2005) and at 13 nm (April 2006), and a vigorous user program was started in August 2005 in the experiments’ hall downstream from the free-electron laser, forming what is now called the FLASH (Free-Electron Laser in Hamburg) facility. In 2003, the German government decided to launch the proposal to constitute a European Facility for the construction and operation of an x-ray free-electron laser in Hamburg, undertaking the commitment to finance the new facility by providing up to 60% of its construction costs, and up to 40% of the operation costs. The choice of the location in Hamburg is motivated by the possibility to take advantage of the unique experience and know-how of DESY in the area of superconducting linacs, and of the possibility to gain first-hand experience on the operation of an FEL through the FLASH facility. LAYOUT OF THE XFEL FACILITY The main components of the XFEL Facility are the injector, the linear accelerator, the beam distribution system, the undulators, the photon beamlines, and the instruments in the Experiments Hall (see Figure 1). These components are distributed along an essentially linear geometry, 3.4 km long, starting on the DESY campus in the northwest part of the city of Hamburg, and ending in the neighbouring Federal State of SchleswigHolstein, south of the city of Schenefeld, where the Experimental Hall is located." @default.
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- W2558479086 date "2006-01-01" @default.
- W2558479086 modified "2023-09-23" @default.
- W2558479086 title "The TTF/VUV-FEL (FLASH) as the Prototype for the European XFEL Project" @default.
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