Paving the Way to Ultra-High-Resolution Resonant Inelastic X-ray Scattering with the SIX Beamline at NSLS-II

Jarrige, Ignace; Bisogni, Valentina; Zhu, Yi; Leonhardt, W.; Dvorak, Joseph

doi:10.1080/08940886.2018.1435949

Cited by 25 publications

(15 citation statements)

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“…RIXS measurements were performed using the Soft Inelastic X-ray (SIX) 2-ID beamline 68,69 . Varied line spacing gratings with line spacings of 500 mm −1 and 1250 mm −1 were, respectively, used on the beamline and spectrometer which, coupled with a 20 μm exit slit, provided a combined resolution of 32 meV.…”

Section: Methodsmentioning

confidence: 99%

Microscopic relaxation channels in materials for superconducting qubits

et al. 2021

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Despite mounting evidence that materials imperfections are a major obstacle to practical applications of superconducting qubits, connections between microscopic material properties and qubit coherence are poorly understood. Here, we combine measurements of transmon qubit relaxation times (T1) with spectroscopy and microscopy of the polycrystalline niobium films used in qubit fabrication. By comparing films deposited using three different techniques, we reveal correlations between T1 and intrinsic film properties such as grain size, enhanced oxygen diffusion along grain boundaries, and the concentration of suboxides near the surface. Qubit and resonator measurements show signatures of two-level system defects, which we propose to be hosted in the grain boundaries and surface oxides. We also show that the residual resistance ratio of the polycrystalline niobium films can be used as a figure of merit for qubit lifetime. This comprehensive approach to understanding qubit decoherence charts a pathway for materials-driven improvements of superconducting qubit performance.

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Section: Methodsmentioning

confidence: 99%

Microscopic relaxation channels in materials for superconducting qubits

et al. 2021

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“…Fig. 4 shows that the Veritas PGM has the most stringent step requirements due to its resolving power design goal of 100 000 -a figure often pursued (Jarrige et al, 2018;Huang & Chen, 2018;Song et al, 2006;Weiss et al, 2001;Follath, 2001) and denoted ultra-high resolution. For high energies, the mechanics should be able to provide steps as small as 20 nrad to make sure that it is the optics that limits the resolution.…”

Section: Figurementioning

confidence: 99%

Understanding the mechanical limitations of the performance of soft X-ray monochromators at MAX IV laboratory

Sjöblom

Todorescu

Urpelainen

2020

J Synchrotron Radiat

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MAX IV is a fourth‐generation, or diffraction‐limited, synchrotron light source with a number of state‐of‐the‐art beamlines. The performance of a beamline is, to a high degree, set by the energy resolution it can achieve, which in turn is governed to a large extent by the monochromator. During the design phase of a monochromator, the mechanical requirements must be fully understood and met with margin. During commissioning, the performance must be verified and optimized. In this paper, six soft X‐ray monochromators at MAX IV beamlines (Bloch, Veritas, HIPPIE, SPECIES, FinEstBeAMS and SoftiMAX) are examined with a focus on their resolving power, energy range and the time required to change measurement range, as those parameters are dependent on each other. The monochromators have a modern commercial design, planned and developed in close collaboration with the vendors. This paper aims to present the current status of the commissioning at MAX IV with emphasis on elucidating the mechanical limitations on the performance of the monochromators. It contains analysis of the outcome and our approach to achieve fast and high‐resolution monochromators.

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“…Under ideal conditions they can reach a sub-eV energy resolution in the hard and a few tens of meV in the soft X-ray range [82,88,89]. Considering the most recent developments at the SIX beamline at NSLS-II, they now reach a DE ¼ 14meV at an energy of E ¼ 1 keV, translating to a E=DE % 71500 [90]. The downside of the WDX based detection is that each (crystal) configuration covers a relatively small energy range, say a few hundred eV in the soft energy range to a few keV in the hard energy range.…”

Section: Introductionmentioning

confidence: 99%

Modern X-ray spectroscopy: XAS and XES in the laboratory

Zimmermann

Peredkov

Abdala

et al. 2020

Coordination Chemistry Reviews

150

140

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X-ray spectroscopy is an important tool for scientific analysis. While the earliest demonstration experiments were realised in the laboratory, with the advent of synchrotron light sources most of the experiments shifted to large scale synchrotron facilities. In the recent past there is an increased interest to perform X-ray experiments also with in-house laboratory sources, to simplify access to X-ray absorption and X-ray emission spectroscopy, in particular for routine measurements. Here we summarise the recent developments and comment on the most representative example experiments in the field of in-house laboratory X-ray spectroscopy. We first give an introduction and some historic background on X-ray spectroscopy. This is followed by an overview of the detection techniques used for X-ray absorption and X-ray emission measurements. A short paragraph also puts related high energy resolution and resonant techniques into context, though they are not yet feasible in the laboratory. At the end of this section the opportunities using wavelength dispersive X-ray spectroscopy in the laboratory are discussed. Then we summarise the relevant details of the recent experimental laboratory setups split into two separate sections, one for the recent von Hamos setups, and one for the recent Johann/Johansson type setups. Following that, focussing on chemistry and catalysis, we then summarise some of the notable X-ray absorption and X-ray emission experiments and the results accomplished with in-house setups. In a third part we then discuss some applications of laboratory X-ray spectroscopy with a particular focus on chemistry and catalysis.

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Paving the Way to Ultra-High-Resolution Resonant Inelastic X-ray Scattering with the SIX Beamline at NSLS-II

Cited by 25 publications

References 0 publications

Microscopic relaxation channels in materials for superconducting qubits

Microscopic relaxation channels in materials for superconducting qubits

Understanding the mechanical limitations of the performance of soft X-ray monochromators at MAX IV laboratory

Modern X-ray spectroscopy: XAS and XES in the laboratory

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