High average power, highly brilliant laser-produced plasma source for soft X-ray spectroscopy

Mantouvalou, Ioanna; Witte, Katharina; Grötzsch, Daniel; Neitzel, Michael; Günther, Sabrina; Baumann, Jonas; Jung, Robert; Stiel, H.; Kanngießer, Birgit; Sandner, W.

doi:10.1063/1.4916193

Cited by 54 publications

(33 citation statements)

References 24 publications

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“…However, recent progress in HHG sources scales down the size of the setups to the table‐top. Moreover, prominent recent developments include low‐power X‐ray (bremsstrahlung) tubes and plasma‐based X‐ray pulse generation . It is anticipated that within a few years a table‐top intense and stable source of isolated ultrafast XUV and X‐ray pulses will appear what will herald the “golden age” of frequency‐ and time‐resolved X‐ray spectroscopy giving rise to a plethora of new techniques and perspective directions …”

Section: X‐ray Spectroscopymentioning

confidence: 99%

Theoretical X‐ray spectroscopy of transition metal compounds

Bokarev

Kühn

2019

WIREs Comput Mol Sci

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X-ray spectroscopy is one of the most powerful tools to access structure and properties of matter in different states of aggregation as it allows to trace atomic and molecular energy levels in course of various physical and chemical processes. Xray spectroscopic techniques probe the local electronic structure of a particular atom in its environment, in contrast to ultraviolet/visible (UV/Vis) spectroscopy, where transitions generally occur between delocalized molecular orbitals. Complementary information is provided by using a combination of different absorption, emission, scattering as well as photo-and autoionization X-ray methods. However, interpretation of the complex experimental spectra and verification of experimental hypotheses is a nontrivial task and powerful first principles theoretical approaches that allow for a systematic investigation of a broad class of systems are needed. Focusing on transition metal compounds, L-edge spectra are of particular relevance as they probe the frontier d-orbitals involved in metal-ligand bonding. Here, neardegeneracy effects in combination with spin-orbit coupling lead to a complicated multiplet energy level structure, which poses a serious challenge to quantum chemical methods. Multiconfigurational self-consistent field (MCSCF) theory has been shown to be capable of providing a rather detailed understanding of experimental X-ray spectroscopy. However, it cannot be considered as a "blackbox" tool and its application requires not only a command of formal theoretical aspects, but also a broad knowledge of already existing applications. Both aspects are covered in this overview.

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Section: X‐ray Spectroscopymentioning

confidence: 99%

Theoretical X‐ray spectroscopy of transition metal compounds

Bokarev

Kühn

2019

WIREs Comput Mol Sci

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“…Over the last several decades, the capabilities of lab-based XAFS and XES instruments have rapidly grown. Researchers now report spectrometers operating as low as the C K-edge (284 eV) 14 using a laser-produced plasma source. Other spectrometers probe the S and P K emission lines (~ 2-2.5 keV) using double crystal monochromators, [15][16][17] a dispersive Rowland circle geometry, [18][19][20][21] and an instrument in the von Hamos geometry.…”

Section: Introductionmentioning

confidence: 99%

An improved laboratory-based x-ray absorption fine structure and x-ray emission spectrometer for analytical applications in materials chemistry research

Jahrman

Holden

Ditter

et al. 2019

Review of Scientific Instruments

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X-ray absorption fine structure (XAFS) and x-ray emission spectroscopy (XES) are advanced xray spectroscopies that impact a wide range of disciplines. However, unlike the majority of other spectroscopic methods, XAFS and XES are accompanied by an unusual access model, wherein; the dominant use of the technique is for premier research studies at world-class facilities, i.e., synchrotron x-ray light sources. In this paper we report the design and performance of an improved spectrometer XAFS and XES based on the general conceptual design of Seidler, et al., Rev. Sci. Instrum. 2014. New developments include reduced mechanical degrees of freedom, much-increased flux, and a wider Bragg angle range to enable extended x-ray absorption fine structure (EXAFS) for the first time with this type of modern laboratory XAFS configuration. This instrument enables a new class of routine applications that are incompatible with the mission and access model of the synchrotron light sources. To illustrate this, we provide numerous examples of x-ray absorption near edge structure (XANES), EXAFS, and XES results for a variety of problems and energy ranges. Highlights include XAFS and XES measurements of battery electrode materials, EXAFS of Ni and V with full modeling of results to validate monochromator performance, valence-to-core XES for 3d transition metal compounds, and uranium XANES and XES for different oxidation states. Taken en masse, these results further support the growing perspective that modern laboratory-based XAFS and XES have the potential to develop a new branch of analytical chemistry.

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“…However, access to these large scale facilities is limited, and thus, there is a strong demand for compact NEXAFS tools. Although, there has been considerable progress in the development of laboratoryscale so X-ray sources, such as laser-or discharge-produced plasmas [2][3][4][5][6][7][8] and high-order harmonics (HHG), 9-12 these sources have been employed for NEXAFS spectroscopy only a few times until now. [13][14][15][16][17][18][19] In addition, except for previous own work including pump-probe experiments 20 and investigations with samples at atmospheric pressure, 21 all these measurements were restricted to photon energies below 500 eV.…”

Section: Introductionmentioning

confidence: 99%