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18 May 2007 The BESSY soft X-ray FEL
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Free electron lasers (FEL) for the hard- and soft X-ray regime are promoted in many projects around the world and the first VUV-FEL with wavelengths down to 20 nm is already in operation at DESY in Hamburg. They open up new domains in coherent radiation, time resolution and intensity and extend current X-ray science. The BESSY project of a 2nd generation FEL facility proposes the implementation of an externally seeded FEL with significantly improved beam quality compared to the conventional self seeded SASE-FELs. The BESSY design as described in the technical design report1 provides full tunability of photon energies from 24 eV to 1 keV, complete polarisation control and reproducible pulse structures with pulse lengths in the femtosecond range. The external seeding ensures the synchronisation to other laser sources necessary for pump-probe experiments and provides shot-to-shot reproducible pulse properties.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rolf Follath "The BESSY soft X-ray FEL", Proc. SPIE 6586, Damage to VUV, EUV, and X-ray Optics, 658604 (18 May 2007);


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