Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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M. V. Pugach¹, V. V. Burdin³, M. Campbell⁴, O. S. Kovalchuk¹, X. Llopart⁴, M. V. Minakov³, V. M. Militsiya¹, O. Yu. Okhrimenko¹, Yu. V. Podrezov³, S. Pospisil⁵, V. M. Pugatch¹, D. I. Storozhyk¹, L. Tlustos⁴, S. O. Firstov³, A. V. Chaus<sup>1

1</sup>Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
²Kyiv Taras Shevchenko National University, Kyiv, Ukraine
³Institute for Problems in Materials Science, National Academy of Sciences of Ukraine, Kyiv, Ukraine
⁴CERN, Geneva, Switzerland
⁵Institute of Experimental and Applied Physics, Prague, Czech Republic

Abstract: The results for the test of a TimePix hybrid detector as a tool for measuring and imaging in real time dynamics of phase transitions in metal alloys under heating or cooling are presented. The X-rays ( ∼ 10 keV) experimental setup explored for the diffraction studies at the Institute for Problems of Material Science of NASU (Kyiv) is briefly described. An evolution of the diffraction maxima position (∼ 20 μm accuracy) of the scattered X-rays was observed with exposures from a few dozen to a few hundred milliseconds under heating or cooling of the samples of Armco iron at a rate of 100 to 250 °C/s. Data for the phase transitions (alpha-, gamma-phases observed) during heating/cooling (20 - 1250 °C) using the X-ray diffraction were measured.

Keywords: position sensitive detectors, micro-pixel detector TimePix, fast X-rays structure analysis, phase transition dynamics.

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