Transient X-Ray Absorption Near Edge Structure Spectroscopy Using Broadband Free-Electron Laser Pulses

被引：2

作者：

Juranic, Pavle ^{[1
]}

Cirelli, Claudio ^{[1
]}

Mamyrbayev, Talgat ^{[2
]}

Uemura, Yohei ^{[3
]}

Vila-Comamala, Joan ^{[1
]}

Lima, Frederico Alves ^{[3
]}

Bacellar, Camila ^{[1
]}

Johnson, Philip J. M. ^{[1
]}

Prat, Eduard ^{[1
]}

Reiche, Sven ^{[1
]}

Wach, Anna ^{[1
]}

Bykova, Iuliia ^{[1
]}

Kabanova, Victoria ^{[1
]}

Milne, Christopher ^{[3
]}

David, Christian ^{[1
]}

机构：

[1] Paul Scherrer Inst, Forsch Str 111, CH-5232 Villigen, Switzerland

[2] XRnanotech GmbH, Forsch Str 111, CH-5232 Villigen, Switzerland

[3] European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany

来源：

SMALL METHODS | 2024年 / 8卷 / 08期

关键词：

FEL; large bandwidth; spectroscopy; XANES; DIFFRACTION; OPERATION; DYNAMICS;

D O I：

10.1002/smtd.202301328

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new method for time-resolved X-ray absorption near edge structure (XANES) spectroscopy that enables faster data acquisition and requires smaller sample quantities for high-quality data, thus allowing the analysis of more samples in a shorter time is introduced. The method uses large bandwidth free electron laser pulses to measure laser-excited XANES spectra in transmission mode. A beam-splitting grating configuration allows simultaneous measurements of the spectra of the incoming X-ray Free Electron Laser (XFEL) pulses and transmission XANES, which is crucial for compensating the pulse-dependent intensity and spectrum fluctuations due to the self-amplified spontaneous emission operation. The implementation of this new methodology is applied on a liquid solution of ammonium iron(III) oxalate jet and is compared to previous results, showing great improvements in the speed of acquisition and spectral resolution, and the ability to measure a large 2-D spectral-time map quickly. A beam-splitting grating configuration that allows simultaneous measurements of the spectra of the incoming XFEL pulses and transmission XANES, which is crucial for compensating the pulse-dependent intensity and spectrum fluctuations due to the self-amplified spontaneous emission (SASE) operation. The implementation of this new methodology is applied on a liquid solution of ammonium iron(III) oxalate jet. image

引用

页数：7

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