| Paper |
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| TUPPH060 |
Three Years of CW-Operation at FELBE - Experiences and Applications
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382 |
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- W. Seidel, E. Cizmar, O. Drachenko, M. Helm, M. Justus, U. Lehnert, P. Michel, M. Ozerov, H. Schneider, R. Schurig, D. Stehr, M. Wagner, S. Winnerl, D. Wohlfarth, S. Zvyagin
FZD, Dresden
- L. Eng, S. C. Kehr
Dresden University of Technology, Institute of Applied Photophysics, Dresden
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This paper reviews the basic properties of the infrared free-electron laser FELBE at the Forschungszentrum Dresden-Rossendorf. A few highlight experiments using the cw-operation are discussed. Driven by a superconducting linear accelerator, FELBE continuously generates infrared pulses with a repetition rate of 13 MHz. In addition, operation in a macropulse modus (pulse duration >100 μs, repetition rate ≤ 25 Hz) is possible. At present FELBE delivers microJ pulses with typical duration of about 0.9-30 ps in the wavelength range 4-230 micrometer. Furthermore we give an outlook on the experiments will use the beam of FELBE in the High Magnetic Field Laboratory Dresden (HLD). The HLD will provide pulsed magnetic fields up to 60 T. It operates as a user facility since 2007.
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| FRAAU03 |
Investigation and Improvement of Beam Stability at the ELBE FELs
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543 |
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- P. Michel, M. Justus, U. Lehnert, P. Michel, D. Proehl, R. Schurig, W. Seidel, J. Teichert
FZD, Dresden
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At the radiation source ELBE in the Forschungszentrum Dresden-Rossendorf two free electron lasers (4-20 μm and 20-230 μm) are in routine user operation for a wide range of IR experiments for some years. The lasers are driven by a superconducting RF Linac which permits the generation of a cw-beam with high average beam power. For many experiments the frequency and power stability of the laser beam is of outstanding importance. Therefore studies on fluctuations and drifts in different time scales (from μs to hours) were accomplished and possible causes for these instabilities were investigated. To improve the long and short term stability we developed and implemented active feed back controls for electron energy and thus laser wavelength and out-coupled IR-beam power at ELBE.
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