TUA03
PSI, Villigen PSI, Switzerland
PSI, Villigen PSI, Switzerland
University of Malta, Faculty of Engineering, Msida, Malta
PSI, Villigen PSI, Switzerland
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TUA03 |
Generation of Sub-Femtosecond X-Ray Pulses at SwissFEL | |
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| We report on the first generation of sub-femtosecond hard X-ray FEL pulses at SwissFEL. A few microjoule pulses with a single spike in the frequency domain have been predicted by simulations and then experimentally demonstrated. Ultra-short X-ray pulses are produced by the electron bunch with a specially-tailored current profile and longitudinal phase space. This configuration is achieved by means of an optimized nonlinear compression. Two- and three-stage nonlinear compression schemes are compared in terms of FEL performance and stability. We also discuss different FEL lasing regimes that can be realized depending on the particular configuration of the electron beam and undulator settings. | ||
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Slides TUA03 [1.809 MB] | |
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| WED01 | Experience with Short-Period, Small Gap Undulators at the SwissFEL Aramis Beamline | 564 |
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| 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. | ||
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Slides WED01 [13.825 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-WED01 | |
| About • | paper received ※ 28 August 2019 paper accepted ※ 06 November 2019 issue date ※ 05 November 2019 | |
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| THP085 | Status of Athos, the Soft X-Ray FEL Line of SwissFEL | 753 |
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| The Athos line will cover the photon energy range from 250 to 1900 eV and will operate in parallel to the hard X-ray line Aramis of SwissFEL. The paper will describe the current layout of the Athos FEL line starting from the fast kicker magnet followed by the dogleg transfer line, the small linac and the 16 APPLE undulators. From there the photon beam passes through the photonics front end and the beamline optics before reaching the experimental stations AMO and FURKA. The focus of this contribution will be on the two bunch operation commissioning (two bunches in the same RF macropulse), which started in 2018, and the characterization of the major components like the APPLE X undulator UE38, the CHIC chicane and the dechirper. The Athos installation inside the tunnel is alternating with Aramis FEL user operation and the first lasing is planned for winter 2019 / 2020. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP085 | |
| About • | paper received ※ 30 July 2019 paper accepted ※ 28 August 2019 issue date ※ 05 November 2019 | |
| Export • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | |