Design Study of an MBA Lattice for the Advanced Photon Source

Decker, G.

doi:10.1080/08940886.2014.970932

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…A new avenue for creating high brightness x-ray beams has been adopted in several storage ring based synchrotron sources worldwide, based on the use of multi-bend achromat (MBA) magnet lattices [692,693]. With the new MBA, the emittance in horizontal direction will be significantly reduced, resulting in a "round" x-ray beam ideal for developing powerful new capabilities for HP research.…”

Section: Future Perspectivesmentioning

confidence: 99%

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

2016

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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.

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Section: Future Perspectivesmentioning

confidence: 99%

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

2016

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“…Microfocus beamlines have proven to be invaluable in allowing investigators to determine structures from microcrystalline samples (Cherezov et al, 2007;Coulibaly et al, 2007;Nelson et al, 2005;Rasmussen et al, 2007Rasmussen et al, , 2011Warne et al, 2008). Likewise, next-generation 'diffractionlimited light sources' that will produce brighter X-ray beams than current third-generation synchrotron sources (Biasci et al, 2014;Borland, 2013;Decker, 2014;Einfeld, 2014;Tanaka, 2014) and XFEL sources hold the promise of an even greater impact on such systems (Barends et al, 2014;Boutet et al, 2012;Chapman et al, 2011;Johansson et al, 2012Johansson et al, , 2013Kern et al, 2012Kern et al, , 2013Kern et al, , 2014Kupitz et al, 2014;Liu, Wacker et al, 2013;Redecke et al, 2013;Sawaya et al, 2014). Chip holders used for X-ray diffraction experiments.…”

Section: Discussionmentioning

confidence: 99%

A high-transparency, micro-patternable chip for X-ray diffraction analysis of microcrystals under native growth conditions

Murray

Lyubimov

Ogata

et al. 2015

Acta Crystallogr D Biol Crystallogr

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“…The calculations presented in this paper were performed for an undulator beamline at the APS and for one to be installed after the APS has been upgraded to a multibend achromat lattice (Decker, 2014). The optical system is designed to address the following requirements: (i) highest possible flux in the energy range 5-10 keV, (ii) minimal high harmonic contamination, and (iii) a spot size not larger than 10 mm in both directions.…”

Section: Source and Beamlinementioning

confidence: 99%

“…The electron energy of the upgraded storage ring will be reduced from 7 GeV to 6 GeV and the stored current increased from 100 mA to 200 mA. The sizes and divergences of the electron beam at the APS and the expected values at the APSU in timing mode (Decker, 2014), as well as the values convoluted with those of the single electron emission from the undulators when tuned to 5 keV, 6.5 keV and 10 keV, are listed in Table 1. The table shows that the horizontal emittance planned for the upgrade will be reduced by a factor of 65.…”

Section: Source and Beamlinementioning

confidence: 99%

A simple optical system delivering a tunable micrometer pink beam that can compensate for heat-induced deformations

Reininger

Liu

Doumy

et al. 2015

J Synchrotron Radiat

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The radiation from an undulator reflected from one or more optical elements (usually termed `pink-beam') is used in photon-hungry experiments. The optical elements serve as a high-energy cutoff and for focusing purposes. One of the issues with this configuration is maintaining the focal spot dimension as the energy of the undulator is varied, since this changes the heat load absorbed by the first optical element. Finite-element analyses of the power absorbed by a side water-cooled mirror exposed to the radiation emitted by an undulator at the Advanced Photon Source (APS) and at the APS after the proposed upgrade (APSU) reveals that the mirror deformation is very close to a convex cylinder creating a virtual source closer to the mirror than the undulator source. Here a simple optical system is described based on a Kirkpatrick-Baez pair which keeps the focus size to less than 2 µm (in the APSU case) with a working distance of 350 mm despite the heat-load-induced change in source distance. Detailed ray tracings at several photon energies for both the APS and APSU show that slightly decreasing the angle of incidence on the mirrors corrects the change in the `virtual' position of the source. The system delivers more than 70% of the first undulator harmonic with very low higher-orders contamination for energies between 5 and 10 keV.

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Design Study of an MBA Lattice for the Advanced Photon Source

Cited by 6 publications

References 5 publications

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

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

A high-transparency, micro-patternable chip for X-ray diffraction analysis of microcrystals under native growth conditions

A simple optical system delivering a tunable micrometer pink beam that can compensate for heat-induced deformations

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