Measurement of thermal conductivity in laser-heated diamond anvil cell using radial temperature distribution
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-05-14 |
| Journal | High Pressure Research |
| Authors | Kamil M. Bulatov, A. N. Semenov, A. A. Bykov, Alexander Machikhin, Konstantin D. Litasov |
| Institutions | Federal State Budgetary Institution of Science āScientific and Technological Center of Unique Instrumentationā of the Russian Academy of Sciences, Institute for High Pressure Physics |
| Citations | 11 |
Abstract
Section titled āAbstractāThermal conductivities of planetary materials under extreme conditions are important input parameters for modeling planetary dynamics such as accretion, geodynamo and magnetic field evolution, plate tectonics, volcanism-related processes etc. However, direct experimental measurements of thermal conductivity at extreme conditions remain challenging and controversial. Here we propose a new technique of thermal conductivity measurement in laser-heated diamond anvil cell (LH-DAC) based on radial temperature distribution around laser focal spot, mapped by imaging tandem acousto-optical tunable filter (TAOTF). The new technique provides much more information about heat fluxes in the laser-heated sample than existing static heating setups, and does not require dynamic numerical modeling using heat capacities in contrast to dynamic pulsed heating setups. In the test experiment, thermal conductivity of Ī³-Fe at conditions relevant to cores of terrestrial planets was measured.