Review of the European XFEL Bunch Compression System: Introduction and Concept Torsten Limberg.

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Presentation transcript:

Review of the European XFEL Bunch Compression System: Introduction and Concept Torsten Limberg

Topics and Speakers Introduction and Concept T. Limberg Optic and Tolerances W. Decking Simulation Calculations M. Dohlus Tuning T. Limberg Bunch Compression Options M. Dohlus Diagnostic Overview & FB H. Schlarb Diagnostic Sections Lay Out C. Gerth Diagnostic Tools and Optical Replica B. Schmidt & M. Yurkov Vacuum N. Mildner, T. Wohlenberg, K. Zapfe

Design Goals and Considerations Electron bunches out of the gun: 50 A peak current, small energy spread BC system has to convert that to: 5 kA peak current < 25 mm Bunch Length (shorter pulses?) < 1.4 mm-mrad slice emittance < 1 MeV slice energy spread (stay about a factor of two below that from synchrotron radiation in undulator) Compensate rf structure wake field induced correlated energy spread as good as possible with rf induced energy chirp for compression (mimimize laser bandwidth) avoid high gain for micro-bunch instability avoid big projected emittance (> 2.5 mm-mrad) < 10% peak current jitter (SASE jitter <10 %) arrival time jitter has mainly to be measured and taken care of by the experiments

Bunch Compression Scheme (TADR)