Paper | Title | Page |
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TUPOPT014 | The Status of the SASE3 Variable Polarization Project at the European XFEL | 1029 |
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The undulator systems at the European XFEL consist of two hard X-ray systems, SASE1 and SASE2, and one soft X-ray system, SASE3. All three systems are equipped with planar undulators using permanent neodymium magnets. These systems allow the generation of linearly polarized radiation in the horizontal plane. In order to generate variable polarization radiation in the soft X-ray range, an afterburner is currently being implemented behind the SASE3 planar undulator system. It consists of four APPLE-X helical undulators. The project, called SASE 3 Variable Polarization, is close to being put into operation. All four helical undulators have been installed in the tunnel during the 2021-2022 winter shutdown. This paper describes the status of the project and the steps toward its commissioning. It also presents lessons learned during the implementation of the project. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT014 | |
About • | Received ※ 02 June 2022 — Revised ※ 12 June 2022 — Accepted ※ 13 June 2022 — Issue date ※ 05 July 2022 | |
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TUPOPT065 | Dispersion-Free Steering Beam Based Alignment at SwissFEL | 1163 |
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Micron-level alignment of the undulator line is required for successful operation of linear accelerator based high gain free electron lasers to produce powerful radiation at X-rays’ wavelengths. Such precision in the straightness of the trajectory allows for an optimal transverse superposition between the electrons and the photon beam. This is extremely challenging and can only be achieved via beam-based techniques. In this paper we will report on the dispersion-free steering approach implemented at SwissFEL, that helped achieving improved performance for both the hard and soft X-ray beamlines. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT065 | |
About • | Received ※ 16 May 2022 — Accepted ※ 16 June 2022 — Issue date ※ 23 June 2022 | |
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