High-temporal-resolution X-ray spectroscopy with free-electron and optical lasers

Rivas, Daniel E.; Serkez, Svitozar; Baumann, T.; Boll, Rebecca; Czwalinna, Marie Kristin; Dold, Simon; Fanis, A. De; Gerasimova, Natalia; Grychtol, Patrik; Lautenschlager, Björn; Lederer, Max; Jeżyński, Tomasz; Kane, Daniel; Mazza, Tommaso; Meier, Joachim; Mueller, J.J.; Pallas, Florent; Rompotis, Dimitrios; Schmidt, Philipp; Schulz, Sebastian; Usenko, Sergey; Venkatesan, Sandhya; Wang, Jinxiong; Meyer, Michael

doi:10.1364/optica.454920

Cited by 13 publications

(10 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, the dynamics of the formation of photoelectron side bands follows this kinetic scheme (see Refs. [6,41]). Such instant dynamics processes are useful in ultrafast experiments with X-ray free electron lasers (FELs) because they allow for precise determination of the temporal overlap between pump and probe pulses (t 0 or t pp = 0).…”

Section: Instant Dynamicsmentioning

confidence: 99%

Inverse Problems in Pump–Probe Spectroscopy

Tikhonov,

Garg,

Schnell

2024

Photochem

View full text Add to dashboard Cite

Ultrafast pump–probe spectroscopic studies allow for deep insights into the mechanisms and timescales of photophysical and photochemical processes. Extracting valuable information from these studies, such as reactive intermediates’ lifetimes and coherent oscillation frequencies, is an example of the inverse problems of chemical kinetics. This article describes a consistent approach for solving this inverse problem that avoids the common obstacles of simple least-squares fitting that can lead to unreliable results. The presented approach is based on the regularized Markov Chain Monte-Carlo sampling for the strongly nonlinear parameters, allowing for a straightforward solution of the ill-posed nonlinear inverse problem. The software to implement the described fitting routine is introduced and the numerical examples of its application are given. We will also touch on critical experimental parameters, such as the temporal overlap of pulses and cross-correlation time and their connection to the minimal reachable time resolution.

show abstract

Section: Instant Dynamicsmentioning

confidence: 99%

Inverse Problems in Pump–Probe Spectroscopy

Tikhonov,

Garg,

Schnell

2024

Photochem

View full text Add to dashboard Cite

show abstract

“…50 fs (fwhm) [3]. Ultrashort X-ray pulse durations and a high stability of x-ray arrival, each of order of 10 fs (fwhm) at a bunch charge of 250 pC [34], have been achieved, too, and will be important for scattering and spectroscopy experiments utilizing ultra-high time resolution. Successful campaigns to provide x-ray pulses with durations at the single femtosecond level and below have been performed using linear and non-linear compression of the electron bunch phase space, at times coupled with fresh-bunch lasing [35,36].…”

Section: Scientific Applications and Facility Statusmentioning

confidence: 99%

Investigating ultrafast structural dynamics using high repetition rate x-ray FEL radiation at European XFEL

Tschentscher

2023

Eur. Phys. J. Plus

View full text Add to dashboard Cite

European XFEL is an international facility providing hard and soft x-ray free-electron laser radiation for user experiments with a wide range of scientific applications. Its superconducting linear accelerator enables high repetition rate experiments with a broad range of x-ray pulse delivery patterns. The combination of time-resolved experiments, providing access to the time-domain from sub-femtoseconds to milliseconds, with atomic resolution x-ray geometric and electronic structure determination methods is responsible for the bulk of scientific applications of European XFEL. In addition, the extreme x-ray intensities and coherence properties open new methods for studying matter out of equilibrium. After start of operation in 2017, the facility now harvests scientific applications with impact to the challenge areas climate and energy, health, environment and sustainability, and digitalization. Extensions of European XFEL aim to increase performance and capabilities for new scientific applications. An upgrade of the facility in the early 2030s will increase the applicability of European XFEL to solid materials and provide dedicated instruments for improved conditions in specific research fields.

show abstract

“…The instrument, described in detail by Mazza et al (2012) and Meyer et al (2023), was commissioned in 2018 (Meyer et al, 2023) and the results of the first successful user experiments have been published (Kastirke et al, 2020a,b;Eichmann et al, 2020;Mazza et al, 2020;LaForge et al, 2021;Jahnke et al, 2021;Li et al, 2021Li et al, , 2022aBoll et al, 2022;Feinberg et al, 2022). Experiments at the SQS instrument exploit the intense, short and coherent X-ray pulses for nonlinear phenomena studies (Mazza et al, 2020;Eichmann et al, 2020;LaForge et al, 2021;Boll et al, 2022), for time-resolved experiments following dynamical processes on the femtosecond timescale (Kastirke et al, 2020b;Jahnke et al, 2021;Grychtol et al, 2021;Rivas et al, 2022) and for investigations using coherent scattering techniques (Ekeberg et al, 2022;Feinberg et al, 2022). This paper is dedicated to the description of the X-ray beam transport system in use during the commissioning phase and the first three user runs until the beginning of 2020, and reports on its performance, evaluated from the results obtained during its commissioning.…”

Section: Introductionmentioning

confidence: 99%

The beam transport system for the Small Quantum Systems instrument at the European XFEL: optical layout and first commissioning results

Mazza¹,

Baumann²,

Boll³

et al. 2023

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

The Small Quantum Systems instrument is one of the six operating instruments of the European XFEL, dedicated to the atomic, molecular and cluster physics communities. The instrument started its user operation at the end of 2018 after a commissioning phase. The design and characterization of the beam transport system are described here. The X-ray optical components of the beamline are detailed, and the beamline performances, transmission and focusing capabilities are reported. It is shown that the X-ray beam can be effectively focused as predicted by ray-tracing simulations. The impact of non-ideal X-ray source conditions on the focusing performances is discussed.

show abstract

High-temporal-resolution X-ray spectroscopy with free-electron and optical lasers

Abstract: Ultrafast X-ray spectroscopies require flexible X-ray properties together with high temporal and spectral resolution. Here, we demonstrate simultaneous sub-20 fs and sub-eV resolutions for pump/probe experiments, without the need for additional photon arrival-time monitors.

Cited by 13 publications

References 15 publications

Inverse Problems in Pump–Probe Spectroscopy

Inverse Problems in Pump–Probe Spectroscopy

Investigating ultrafast structural dynamics using high repetition rate x-ray FEL radiation at European XFEL

The beam transport system for the Small Quantum Systems instrument at the European XFEL: optical layout and first commissioning results

Contact Info

Product

Resources

About