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WE1L1 |
Status and Future of XFEL Source Developments | |
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| Since the first demonstration of the SASE principle in the X-ray regime, there has been an ongoing development on improving and controlling the properties of the generated X-ray FEL pulses. This presentation gives a brief status on these efforts and an outlook of possible improvements in the future. | ||
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Slides WE1L1 [4.884 MB] | |
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WE1L2 |
Progress of Cavity-based X-ray Free-electron Lasers | |
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Cavity-based X-ray Free electron lasers (FELs) such as the X-ray regenerative amplifier FEL (XRAFEL)* and the X-ray FEL oscillator (XFELO)** have been proposed to produce temporally coherent and stable hard X-ray pulses, especially for high-repetition rate FEL facilities. An X-ray cavity consisting of Bragg crystals will be used to recirculate the spectrally filtered X-rays for repetitive interactions with an electron bunch train and to generate high-power and narrow-bandwidth radiation. In this talk, we review the scientific motivation and recent progress of Cavity-based X-ray FELs. We discuss cavity designs, optics requirements, outcoupling schemes, and the latest experimental results. Finally, we introduce the ongoing RD projects at LCLS*** and European XFEL**** to prove the concept, as well as several Cavity-based proposals to enhance X-ray FEL’s spectral brightness by another two to three orders of magnitude compared to the state of art.
* Z. Huang and R.D. Ruth, Phys. Rev. Lett. 96, 144801 (2006). ** K.-J. Kim et al., Phys. Rev. Lett. 100, 244802 (2008). *** K.J. Kim et al., Cavity-based XFEL R&D Project, this workshop. **** P. Rauer et al., Phys. Rev. Accel. Beams 26, 020701 (2023). |
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Slides WE1L2 [5.251 MB] | |
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WE1L3 |
Enabling Technology Towards Multiline Compact XFELs | |
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| After almost 15 years of openation, XFELs are well-established light sources for addressing many problems in science. However, most FEL facilities are relatively large to reach the beam energies and geometric emittancs needed to lase at higher photon energy. Furthermore, the XFEL can only serve one or a few users at at time. At Argonne National Laboratory, we have initiated a research program to address some of these issues. We report on our program develop independent undulator arrays to allow more simultaneous users. We are developing a compact Adjustable Phase Undulator that have a compact transverse footprint and a superconducting undulator design with multiple undulators per cryostat. In addition, we report on a new concept for an ultrolow emittance electron gun which reaches fields several times higher than existing guns. This is achieved by generating <10 nsec RF pulses similar to other two-beam accelerator concepts. | ||
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Slides WE1L3 [3.183 MB] | |
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| WE1L4 | Operating Liquid MetalJet X-ray Sources for Materials Research | 159 |
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| Even on the 100th anniversary of the death of Wilhelm Conrad Röntgen, the demand for applications of his discovery of X-rays is not diminishing. On the contrary, both academic and industrial research and development need X-ray generating devices with ever-improving properties more than ever to meet the current challenges of science and technology. For this reason, the development of next-generation synchrotrons is being driven forward and made available to users worldwide. Nevertheless, the availability of synchrotron beamtime will always remain limited, even with the most brilliant sources for ultra-fast and high-throughput experiments. That is why the operation of and research with decentralized laboratory equipment becomes just as important. This presentation will therefore focus on the latest developments in laboratory sources in the hard X-ray regime for materials research. In this context, Helmholtz-Zentrum Berlin (HZB) has commissioned EXCILLUM’s new high-flux MetalJet X-ray devices providing photon energies up to 70 keV and 160 keV, respectively. The presentation will give a summary of the technical specifications of these sources utilizing a liquid metal as anode material and the diffractometer lab installations operated with them at HZB. Selected experimental examples are shown providing an overview of applications performed at the MetalJet measuring stations - ranging from residual stress analysis on technical parts to real-time measurements on thin films for photovoltaics applying angle- and energy-dispersive diffraction as well as studies in the field of time-resolved imaging. A comparison to synchrotron measurements is made to benchmark the performance of the available setups. In conclusion, the effort and expenses required to operate such X-ray devices for in-house research and user service measurements are summarized. | ||
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Slides WE1L4 [3.423 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-FLS2023-WE1L4 | |
| About • | Received ※ 23 August 2023 — Revised ※ 29 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023 | |
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