Abstract
DESY’s free-electron laser FLASH provides soft X-ray pulses for scientific users at wavelengths down to 4nm simultaneously in two undulator beamlines. They are driven by a common linear superconducting accelerator with a beam energy of up to 1.25 GeV. The superconducting technology allows the acceleration of electron bunch trains of several hundred bunches with a spacing of 1 microsecond or more and a repetition rate of 10 Hz. A fast kickerseptum system directs one part of the bunch train to FLASH1 and the other part to FLASH2 keeping the full 10 Hz repetition rate for both. The unique setup of FLASH allows independent FEL pulse parameters for both beamlines. In April 2016, simultaneous operation of FLASH1 and FLASH2 for external users started. This paper reports on our operating experience with this type of multi-beam, multi-beamline set-up.
Highlights
The superconducting soft X-ray free-electron laser FLASH [1, 2, 3] delivers FEL pulses in the wavelength range from 4 to 90 nm for user experiments
All these measurements have been performed in simultaneous operation with FLASH1
Even with a factor 5 difference in charge between FLASH1 and FLASH2 an independent setup of both beamlines is possible. Such a setup is challenging since the injector laser beam size at the photo-cathode can currently not be chosen independently but in future it is planed to modify the laser beamline to allow different beam sizes. This will further increase the flexibility of the setup
Summary
This content has been downloaded from IOPscience. Ser. 874 012023 (http://iopscience.iop.org/1742-6596/874/1/012023) View the table of contents for this issue, or go to the journal homepage for more. You may be interested in: Simultaneous operation of two soft x-ray free-electron lasers driven by one linear accelerator B Faatz, E Plönjes, S Ackermann et al An optical parametric chirped-pulse amplifier for seeding high repetition rate free-electron lasers H Höppner, A Hage, T Tanikawa et al Performance measurements on NIF beamlines for future experiments to support polar direct drive J K Crane, B Kruschwitz, S T Yang et al AMO science at the FLASH and European XFEL free-electron laser facilities J Feldhaus, M Krikunova, M Meyer et al Current status and future perspectives of accelerator-based x-ray light sources Takashi Tanaka The soft x-ray free-electron laser FLASH at DESY: beamlines, diagnostics and end-stations K Tiedtke, A Azima, N von Bargen et al DiamHond and ISIS get extra beamlines Matin Durrani Studying planetary matter using intense x-ray pulses K Appel, M Nakatsutsumi, A Pelka et al Comparison of Multi-Beam and Single-Beam Cytofluorometers for an Automated Screening System in Gynecologic Cytology Ken-ichi Fujii and Norihito Suzuki. J Ronsch-Schulenburg, B Faatz, K Honkavaara, M Kuhlmann, S Schreiber, R Treusch, M Vogt
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