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Main Title: Laboratory quick near edge x-ray absorption fine structure spectroscopy in the soft x-ray range with 100 Hz frame rate using CMOS technology
Author(s): Jonas, Adrian
Staeck, Steffen
Kanngießer, Birgit
Stiel, Holger
Mantouvalou, Ioanna
Type: Article
Abstract: In laboratory based x-ray absorption fine structure (XAFS) spectroscopy, the slow readout speed of conventional CCD cameras can prolong the measuring times by multiple orders of magnitude. Using pulsed sources, e.g., laser-based x-ray sources, the pulse repetition rate often exceeds the frame rate of the CCD camera. We report the use of a scientific CMOS (sCMOS) camera for XAFS spectroscopy with a laser-produced plasma source facilitating measurements at 100 Hz. With this technological improvement, a new class of experiments becomes possible, starting from the time consuming analysis of samples with small absorption to pump-probe investigations. Furthermore, laboratory quick soft x-ray absorption fine structure (QXAFS) measurements with 10 ms time resolution are rendered feasible. We present the characterization of the sCMOS camera concerning noise characteristics and a comparison to conventional CCD camera performance. The feasibility of time resolved QXAFS measurements is shown by analyzing the statistical uncertainty of single shot spectra. Finally, XAFS spectroscopy on a complex sandwich structure with minute amounts of NiO exemplifies the additional merits of fast detectors.
Subject(s): NEXAFS
pump probe
laser produced plasma source
Issue Date: 16-Feb-2021
Date Available: 5-May-2022
Is Part Of: 10.14279/depositonce-14776
Language Code: en
DDC Class: 530 Physik
Sponsor/Funder: DFG, 313838950, Neuartiges Laborspektrometer für Pump-Probe NEXAFS-Untersuchungen an Biomolekülen in wässriger Lösung
EC/H2020/654148/EU/The Integrated Initiative of European Laser Research Infrastructures/LASERLAB-EUROPE
Journal Title: Review of Scientific Instruments
Publisher: AIP
Volume: 92
Issue: 2
Article Number: 023102
Publisher DOI: 10.1063/5.0032628
EISSN: 1089-7623
ISSN: 0034-6748
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Optik und Atomare Physik » FG Analytische Röntgenphysik
Appears in Collections:Technische Universität Berlin » Publications

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