Progress towards top-up mode operations at the Advanced Photon Source

Emery, L.; Borland, M.

doi:10.1063/1.1291823

Cited by 7 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the 1980s, great efforts have been made to take advantage of the characteristics of SR for HP research, including: (1) high intensity over a broad energy range, (2) low emittance (small angular divergence), (3) tunable energy and bandwidth with the use of monochromators, (4) pulsed time structure, (5) polarization of the radiation, and (6) coherence of the x-ray wave. Recently constructed synchrotron facilities have achieved a high degree of orbit stability [8,9], providing highly stable x-ray beams in terms of intensity and position that are critical for HP experiments. The unique SR characteristics are unleashing the rich potential of HP science.…”

Section: Synchrotron X-rays-penetrating Probes For Minute High Pressu...mentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

View full text Add to dashboard Cite

Pressure profoundly alters all states of matter. The symbiotic development of ultrahighpressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.

show abstract

Section: Synchrotron X-rays-penetrating Probes For Minute High Pressu...mentioning

confidence: 99%

High-pressure studies with x-rays using diamond anvil cells

2016

View full text Add to dashboard Cite

show abstract

“…For example, a 1° change in temperature causes an 11-μm expansion of a 1-m steel rod. One important development that improved beam stability is the “Top-Up” mode of operation [28,29] that maintains a constant beam current, thereby stabilizing the temperature of the tunnel and all support structures in the front end. The incorporation of high-resolution X-ray beam-position monitors in positional feedback systems at some facilities has also improved beam stability.…”

Section: Technologies For Micro-crystallography: It’s All About Stabimentioning

confidence: 99%

Micro-crystallography comes of age

Smith

Fischetti

Yamamoto

2012

Current Opinion in Structural Biology

146

110

View full text Add to dashboard Cite

The latest revolution in macromolecular crystallography was incited by the development of dedicated, user friendly, micro-crystallography beamlines. Brilliant X-ray beams of diameter 20 microns or less, now available at most synchrotron sources, enable structure determination from samples that previously were inaccessible. Relative to traditional crystallography, crystals with one or more small dimensions have diffraction patterns with vastly improved signal-to-noise when recorded with an appropriately matched beam size. Structures can be solved from isolated, well diffracting regions within inhomogeneous samples. This review summarizes the technological requirements and approaches to producing micro-beams and how they continue to change the practice of crystallography.

show abstract