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Single crystal toroidal diamond anvils for high pressure experiments beyond 5 megabar.

ABSTRACT: Static compression experiments over 4 Mbar are rare, yet critical for developing accurate fundamental physics and chemistry models, relevant to a range of topics including modeling planetary interiors. Here we show that focused ion beam crafted toroidal single-crystal diamond anvils with ~9.0 μm culets are capable of producing pressures over 5 Mbar. The toroidal surface prevents gasket outflow and provides a means to stabilize the central culet. We have reached a maximum pressure of ~6.15 Mbar using Re as in situ pressure marker, a pressure regime typically accessed only by double-stage diamond anvils and dynamic compression platforms. Optimizing single-crystal diamond anvil design is key for extending the pressure range over which studies can be performed in the diamond anvil cell.

SUBMITTER: Jenei Z

PROVIDER: S-EPMC6120914 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Single crystal toroidal diamond anvils for high pressure experiments beyond 5 megabar.

Jenei Zs Z O'Bannon E F EF Weir S T ST Cynn H H Lipp M J MJ Evans W J WJ

Nature communications 20180903 1

Static compression experiments over 4 Mbar are rare, yet critical for developing accurate fundamental physics and chemistry models, relevant to a range of topics including modeling planetary interiors. Here we show that focused ion beam crafted toroidal single-crystal diamond anvils with ~9.0 μm culets are capable of producing pressures over 5 Mbar. The toroidal surface prevents gasket outflow and provides a means to stabilize the central culet. We have reached a maximum pressure of ~6.15 Mbar u ...[more]

PMID: 30177697

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