Near-edge x-ray absorption fine structure spectroscopy at atmospheric pressure with a table-top laser-induced soft x-ray source

The authors present a table-top soft x-ray absorption spectrometer, accomplishing investigations of the near-edge x-ray absorption fine structure (NEXAFS) in a laboratory environment. The system is based on a low debris plasma ignited by a picosecond laser in a pulsed krypton gas jet, emitting soft...

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Bibliographic Details
Published in:Journal of vacuum science & technology. A, Vacuum, surfaces, and films Vacuum, surfaces, and films, 2016-07, Vol.34 (4)
Main Authors: Kühl, Frank-Christian, Müller, Matthias, Schellhorn, Meike, Mann, Klaus, Wieneke, Stefan, Eusterhues, Karin
Format: Article
Language:English
Subjects:
ABSORPTION
ABSORPTION SPECTROSCOPY
AIR
ATMOSPHERIC PRESSURE
CALCIUM
CALCIUM CHLORIDES
ENGINEERING
FINE STRUCTURE
HELIUM
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KRYPTON
LASERS
MANGANESE
OXYGEN
SOFT X RADIATION
SPECTROMETERS
WATER
X-RAY SOURCES
X-RAY SPECTROSCOPY
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Summary:The authors present a table-top soft x-ray absorption spectrometer, accomplishing investigations of the near-edge x-ray absorption fine structure (NEXAFS) in a laboratory environment. The system is based on a low debris plasma ignited by a picosecond laser in a pulsed krypton gas jet, emitting soft x-ray radiation in the range from 1 to 5 nm. For absorption spectroscopy in and around the “water window” (2.3–4.4 nm), a compact helium purged sample compartment for experiments at atmospheric pressure has been constructed and tested. NEXAFS measurements on CaCl2 and KMnO4 samples were conducted at the calcium and manganese L-edges, as well as at the oxygen K-edge in air, atmospheric helium, and under vacuum, respectively. The results indicate the importance of atmospheric conditions for an investigation of sample hydration processes.
ISSN:0734-2101
1520-8559
DOI:10.1116/1.4950599