Experience with short-period, small gap undulators at the SwissFEL aramis beamline
| Autor: | Schmidt, Thomas J., Calvi, Marco, Kittel, Christoph, Voulot, Didier, Hiller, Nicole, Schietinger, Thomas, Prat-Costa, E., Bettoni, Simona, Reiche, Sven, Ferrari, Eugenio, Aiba, Masamitsu, Ganter, Romain, Löhl, F., Alarcon, Arturo, Wagner, Ulrich H., Follath, Rolf, Juranic, Pavle N., Arrell, Christopher A., Scherrer, Paul, Cassar, Ariana, Sammut, Nicholas, 39th International Free-Electron Laser Conference |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
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| Popis: | The SwissFEL Aramis beamline provides hard X-ray FEL radiation down to 1 Angström with 5.8 GeV and short period, 15 mm, in-vacuum undulators (U15). To reach the maximum designed K-value of 1.8 the U15s have to be operated with vacuum gaps down to 3.0 mm. The thirteen-undulator modules are 4 m long and each of them is equipped with a pair of permanent magnet quadrupoles at the two ends, aligned magnetically to the undulator axis. Optical systems and dedicated photon diagnostics are used to check the alignment and improve the K-value calibration. In this talk the main steps of the undulator commissioning will be recalled and a systematic comparison between the magnetic results and the electron and photon based measurements will be reported to highlight achievements and open issues. Proceedings of the 39th Free Electron Laser Conference, FEL2019, Hamburg, Germany |
| Databáze: | OpenAIRE |
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