Image analysis of speckle patterns as a probe of melting transitions in laser-heated diamond anvil cell experiments

The precision of melting curve measurements using laser-heated diamond anvil cell (LHDAC) is largely limited by the correct and reliable determination of the onset of melting. We present a novel image analysis of speckle interference patterns in the LHDAC as a way to define quantitative measures whi...

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Bibliographic Details
Published inReview of scientific instruments Vol. 86; no. 9; p. 093907
Main Authors Salem, Ran, Matityahu, Shlomi, Melchior, Aviva, Nikolaevsky, Mark, Noked, Ori, Sterer, Eran
Format Journal Article
LanguageEnglish
Published United States 01.09.2015
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Summary:The precision of melting curve measurements using laser-heated diamond anvil cell (LHDAC) is largely limited by the correct and reliable determination of the onset of melting. We present a novel image analysis of speckle interference patterns in the LHDAC as a way to define quantitative measures which enable an objective determination of the melting transition. Combined with our low-temperature customized IR pyrometer, designed for measurements down to 500 K, our setup allows studying the melting curve of materials with low melting temperatures, with relatively high precision. As an application, the melting curve of Te was measured up to 35 GPa. The results are found to be in good agreement with previous data obtained at pressures up to 10 GPa.
ISSN:1089-7623
DOI:10.1063/1.4931167