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- W2911152978 abstract "The European X-ray Free Electron Laser (European XFEL) is a new user facility in the metropolitan area of Hamburg, Germany. It offers ultra-short (femtosecond) and intense (GigaWatt) transversely coherent x-ray laser beams in the soft to hard x-ray domain at MHz repetition rate. Up to 2700 pulses per train will be delivered at 10 Hz train repetition rate. The x-ray diagnostics [1-4] serves the electron machine to achieve lasing by Self-Amplified Spontaneous Emission (SASE), supports the SASE tuning, and assists to align and commission the photon beam transport. Finally, it delivers non-invasive online beam diagnostic data to the users at the experimental end-stations. In May 2017 the first undulator beamline, SASE1, was successfully commissioned with beam, and First Lasing was detected. This presentation describes the contribution of photon diagnostics during the distinct commissioning phases: Pre-beam checkout, first light from the bending magnets, x-rays from single undulator segments, SASE tuning with many undulator segments, First Lasing, optics alignment for FEL beam transport through the tunnel up to the experimental hutches, and finally beam delivery to first users. Assessed beam properties included per-pulse intensity, beam position, shape, lateral dimensions, and spectral properties. During this period, the machine provided up to 0.1 nm wavelength at up to 1.5 mJ pulse energy, up to 300 FEL pulses per train, and up to 4.5 MHz intra-bunch train repetition." @default.
- W2911152978 created "2019-01-25" @default.
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- W2911152978 date "2019-01-01" @default.
- W2911152978 modified "2023-10-01" @default.
- W2911152978 title "First photon diagnostics commissioning at the European XFEL" @default.
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- W2911152978 doi "https://doi.org/10.1063/1.5084577" @default.
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