Advanced flat top laser heating system for high pressure research at GSECARS: application to the melting behavior of germanium

Prakapenka, Vitali B.; Kubo, Atsushi; Kuznetsov, Alexei; Laskin, Alexander; Shkurikhin, O.; Dera, P.; Rivers, Mark L.; Sutton, S. R.

doi:10.1080/08957950802050718

Cited by 304 publications

(228 citation statements)

References 2 publications

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“…Laser-heating techniques in DACs cover a wide pressure-temperature fieldabove 300 GPa and up to 5000 K [8,18,19]. Recent advantages in online laser-heating techniques [17] have resulted in significant improvement of the reliability of in situ X-ray powder diffraction studies in laser-heated DACs that have become routine at a number of synchrotron facilities including specialized beamlines at the third-generation synchrotrons. However, so far, no existing DAC laser-heating systems can be used for single-crystal X-ray diffraction experiments aimed not only at determining lattice parameters, but also at measuring intensity data for structural refinements.…”

Section: Portable Laser-heating System For Single-crystal X-ray Diffrmentioning

confidence: 99%

“…The functions of the UniHead in the portable laser heating system are: (1) to focus the incoming laser beam on the sample within the DAC; (2) to provide a high magnification imaging of the sample in the DAC with coaxial illumination; and (3) to give access for the multiwavelength spectroradiometry for temperature measurements [19]. The output of the SPI100 laser has a Gaussian shape with a diameter of ∼3 mm at 1/e 2 and is focused down to ∼25 μm at FWHM, while if the π-shaper [17] is used (Figure 1), the beam size increases to ∼40 μm and forms a flat top. Due to the modular construction, the portable laser-heating system can be used in various modifications; namely, for heating samples in an independently standing DAC or in a cell coupled directly to UniHead -in a "direct" (the optical axis of the DAC and the UniHead axis coincide) or "right angle" (at 90 • between the optical axis of the DAC and that of the UniHead) geometry.…”

Section: Portable Laser-heating System For Single-crystal X-ray Diffrmentioning

confidence: 99%

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Single-crystal X-ray diffraction at megabar pressures and temperatures of thousands of degrees

Dubrovinsky

Boffa-Ballaran

Glazyrin

et al. 2010

High Pressure Research

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The most reliable information about crystal structures and their response to changes in pressure and temperature is obtained from single-crystal diffraction experiments. We have developed a methodology to perform single-crystal X-ray diffraction experiments in laser-heated diamond anvil cells and demonstrate that structural refinements and accurate measurements of the thermal equation of state of metals, oxides and silicates from single-crystal intensity data are possible in pressures ranging up to megabars and temperatures of thousands of degrees. A new methodology was applied to solve the in situ high pressure, high temperature structure of iron oxide and study structural variations of iron and aluminum bearing silicate perovskite at conditions of the Earth's lower mantle.

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Section: Portable Laser-heating System For Single-crystal X-ray Diffrmentioning

confidence: 99%

Section: Portable Laser-heating System For Single-crystal X-ray Diffrmentioning

confidence: 99%

Single-crystal X-ray diffraction at megabar pressures and temperatures of thousands of degrees

Dubrovinsky

Boffa-Ballaran

Glazyrin

et al. 2010

High Pressure Research

Self Cite

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“…Different modes of lasers [134] or beam profilers [135] have been used to achieve flap-top profiles in laser power distribution. However, due to possible inhomogeneities in HP samples, even a flat-top laser may not provide uniform heating of the sample.…”

Section: Laser Heatingmentioning

confidence: 99%

“…Many synchrotron facilities are equipped with double sided laser heating systems [131,[133][134][135][137][138][139][140]. Portable laser heating systems have recently been developed [121,141,142], expanding the use of the laser heating techniques into specialized beamlines without permanent laser heating systems.…”

Section: Laser Heatingmentioning

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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“…The flint was heated at this pressure with flat top laser beams of 25 μm in diameter for 5 min using the fiber laser heating system at 13-ID-D (Prakapenka et al 2008). A Princeton spectrometer with a PIXIS detector measured the blackbody radiation from which the maximum temperature was measured to be ~2,200 K. Following heating, sample pressure dropped to 15 GPa; stishovite was not yet seen in diffraction patterns.…”

Section: Runmentioning

confidence: 99%

Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

et al. 2014

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Advanced flat top laser heating system for high pressure research at GSECARS: application to the melting behavior of germanium

Cited by 304 publications

References 2 publications

Single-crystal X-ray diffraction at megabar pressures and temperatures of thousands of degrees

Single-crystal X-ray diffraction at megabar pressures and temperatures of thousands of degrees

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

Preferred orientation in experimentally deformed stishovite: implications for deformation mechanisms

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