U. Flechsig

Sharper, smaller, brighter: enhanced optical performance at the X06DA-PXIII beamline after the SLS 2.0 upgrade

Benedikt Rösner, Vincent Oliéric, Michael Boege, R. Follath et autres

The X06DA-PXIII beamline is a crystallography beamline on a superbend magnet at the Swiss Light Source. Since 2008, it has served the scientific community, contributing to 2650 Protein Data Bank structures as of today (i.e. before the SLS shutdown started in autumn …

ch (code pays fourni par la source)

High magnification optical imaging systems for the characterization of soft X-ray focii

André Al Haddad, Antoine Sarracini, Kirsten Schnorr, Gregor Knopp et autres

We present a series of novel X-ray imaging systems designed specifically for the soft X-ray energy range, optimized for operation in ultra-high-vacuum environments and compactness. These systems achieve micrometre-level spatial resolution with high collection efficiency of visible light by using high numerical …

ch (code pays fourni par la source)

The new metrology lab at PSI

Benedikt Rösner, Sibylle Spielmann-Jäggi, Sven Drobniewska, Jan Krebs et autres

We report on our new X-ray Optics Metrology Laboratory, which is specifically designed to meet the stringent requirements for nowadays X-ray optics. Recognizing the critical role of precision metrology in advancing high-performance X-ray optics, our laboratory integrates a suite of complementary instruments …

ch (code pays fourni par la source)

Improving the quality of x-ray mirrors: An inter-lab, optical metrology collaboration to guide deterministic polishing

Simon G. Alcock, Ioana Nistea, Murilo Bazan Da Silva, Kawal J. S. Sawhney et autres

The surface quality of x-ray mirrors is a major constraint on optical performance at synchrotron light and free electron laser facilities. A limiting factor for creating state-of-the-art optics is the accuracy of metrology data to deterministically guide the polishing tool to correct …

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Commissioning results of the ATHOS-beamline at SwissFEL

R. Follath, Ulrich Wagner, Christopher Arrell, U. Flechsig

Abstract The Soft X-ray Free Electron Laser ATHOS at SwissFEL came into operation at the end of 2019 together with a variable line space grating monochromator. The beamline alternatively distributes the FEL-beam to two end stations namely Maloja and Furka. A third …

ch (code pays fourni par la source)

Line density measurement of a spherical variable line space diffraction grating with a long trace profiler

U. Flechsig, Alessandra Lavazza, Sibylle Spielmann-Jäggi

A fully automated, high resolution method to measure the variable line density of a spherical grating is presented. The assessment of the line density requires an accurate evaluation of the first order diffraction angle, from which the line spacing is calculated. The …

ch (code pays fourni par la source)

The concept for hard X-ray beamline optics at SLS 2.0

Benedikt Roesner, Jörg Raabe, Philip R. Willmott, U. Flechsig

In the scope of the latest upgrade of the Swiss Light Source, five hard X-ray beamlines will be constructed or rebuilt. To use synergies between these beamline projects, a concept is developed here for hard X-ray beamlines that is tailored to the …

ch (code pays fourni par la source)

SwissFEL KB-optics at-wavelength wavefront characterisation

Juraj Krempaský, Jakub Vonka, Bill Pedrini, Alexander Steppke et autres

Steering x-ray beams from the source towards the experiment without distorting their wavefront defines extraordinary high-quality requirements on the production of the x-ray optics. We report on how this demand settled with in situ shot-to-shot wavefront sensing optimization of KB optics at …

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A Grazing Incidence Variable Line-spacing Spherical Grating Monochromator for SwissFEL

Ulrich Wagner, R. Follath, U. Flechsig, L. Patthey

Abstract In this paper, we present a soft x-ray variable line-spacing spherical grating monochromator, which is shared between the three ATHOS beamlines at SwissFEL. The instrument uses grazing incidence angles of less than 3° to withstand the peak-fluence of femtosecond FEL pulses …

ch (code pays fourni par la source)

A compact and cost-effective hard X-ray free-electron laser driven by a high-brightness and low-energy electron beam

Eduard Prat, Rafael Abela, M. Aiba, Arturo Alarcon et autres

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The SwissFEL soft X-ray free-electron laser beamline: Athos

Rafael Abela, Arturo Alarcon, Jürgen Alex, Christopher Arrell et autres

The SwissFEL soft X-ray free-electron laser (FEL) beamline Athos will be ready for user operation in 2021. Its design includes a novel layout of alternating magnetic chicanes and short undulator segments. Together with the APPLE X architecture of undulators, the Athos branch …

ch (code pays fourni par la source)

Wavefront sensing at X-ray free-electron lasers

Matthew Seaberg, Ruxandra Cojocaru, Sébastien Bérujon, Eric Ziegler et autres

Here a direct comparison is made between various X-ray wavefront sensing methods with application to optics alignment and focus characterization at X-ray free-electron lasers (XFELs). Focus optimization at XFEL beamlines presents unique challenges due to high peak powers as well as beam …

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