The free-electron laser FLASH

Schreiber, S.; Faatz, B.

doi:10.1017/hpl.2015.16

Cited by 54 publications

(43 citation statements)

References 43 publications

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“…FLASH began operation for experiments in the extended ultraviolet (XUV) and soft X-ray regime in summer 2005 as the world's first short-wavelength free-electron laser (FEL) facility [1][2][3]. Due to its superconducting accelerator technology, FLASH is currently the only high-repetition rate XUV and soft X-ray FEL which can deliver up to 8000 photon pulses per second for experiments, while normal conducting FELs typically run at rates between 10 and 120 pulses per second.…”

Section: Introductionmentioning

confidence: 99%

The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives

et al. 2017

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Since 2016, the two free-electron laser (FEL) lines FLASH1 and FLASH2 have been run simultaneously for users at DESY in Hamburg. With the installation of variable gap undulators in the new FLASH2 FEL line, many new possibilities have opened up in terms of photon parameters for experiments. What has been tested so far is post-saturation tapering, reverse tapering, harmonic lasing, harmonic lasing self-seeding and two-color lasing. At the moment, we are working on concepts to enhance the capabilities of the FLASH facility even further. A major part of the upgrade plans, known as FLASH2020, will involve the exchange of the fixed gap undulators in FLASH1 and the implementation of a new flexible undulator scheme aimed at providing coherent radiation for multi-color experiments over a broad wavelength range. The recent achievements in FLASH2 and the current status of plans for the further development of the facility are presented.

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Section: Introductionmentioning

confidence: 99%

The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives

et al. 2017

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“…Beams with durations of 1-7 ps r.m.s. and charges of up to 1 nC are generated in a laser-driven photocathode RF-gun and accelerated to a maximum energy of 1.25 GeV by seven 1.3 GHz SRF modules [6]. Longitudinal compression down to sub-100 fs durations takes place in two magnetic chicanes.…”

Section: Flashforward Overviewmentioning

confidence: 99%

FLASHForward X-2: Towards beam quality preservation in a plasma booster

Libov

Aschikhin

Dale

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tBeam quality preservation in the external injection scheme is one of the key missing milestones towards staging of plasma-wakefield accelerators, a prerequisite for their utilisation in particle physics or other applications requiring high energy beams. This topic will be studied at FLASHForward, a unique beam-driven plasma wakefield acceleration facility currently under construction at DESY (Hamburg, Germany), in the frame of the FLASHForward X-2 experiment. High-quality 1 GeV-class electron beams from the free-electron laser FLASH with m-emittances, kA-scale currents, and less than 100 fs durations will be utilised to generate driver-witness pairs by using a mask in a dispersive section. In this contribution the physics case and the current status of the FLASHForward X-2 experiment are reviewed. The experimental installation is described, with a focus on the electron beamline. Electron beam dynamics and particle-in-cell simulations are presented.

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“…The layout of the FLASH facility including the new FLASH2 beamline is sketched in figure 1. A detailed description of the accelerator can be found in [5,16], only the components which are important for simultaneous operation are described below. As the electrons are emitted by the same gun and accelerated by the same accelerator, they have similar properties.…”

Section: Beam Distribution For Flash1 and Flash2mentioning

confidence: 99%

Simultaneous operation of two soft x-ray free-electron lasers driven by one linear accelerator

et al. 2016

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Extreme-ultraviolet to x-ray free-electron lasers (FELs) in operation for scientific applications are up to now single-user facilities. While most FELs generate around 100 photon pulses per second, FLASH at DESY can deliver almost two orders of magnitude more pulses in this time span due to its superconducting accelerator technology. This makes the facility a prime candidate to realize the next step in FELs-dividing the electron pulse trains into several FEL lines and delivering photon pulses to several users at the same time. Hence, FLASH has been extended with a second undulator line and self-amplified spontaneous emission (SASE) is demonstrated in both FELs simultaneously. FLASH can now deliver MHz pulse trains to two user experiments in parallel with individually selected photon beam characteristics. First results of the capabilities of this extension are shown with emphasis on independent variation of wavelength, repetition rate, and photon pulse length.

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The free-electron laser FLASH

Cited by 54 publications

References 43 publications

The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives

The FLASH Facility: Advanced Options for FLASH2 and Future Perspectives

FLASHForward X-2: Towards beam quality preservation in a plasma booster

Simultaneous operation of two soft x-ray free-electron lasers driven by one linear accelerator

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