Measurement of the temperature distribution on the surface of the laser heated specimen in a diamond anvil cell system by the tandem imaging acousto-optical filter

Zinin, Pavel V.; Быков, А. А.; Мачихин, А. С.; Troyan, I. A.; Bulatov, K. M.; Mantrova, Y.V.; Batshev, V. I.; Gaponov, Maksim I.; Kutuza, I. B.; Rashchenko, Sergey V.; Prakapenka, Vitali B.; Sharma, Shiv K.

doi:10.1080/08957959.2018.1564748

Cited by 20 publications

(11 citation statements)

References 32 publications

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“…Description of the one-side static laser heating experiment with temperature mapping can be found elsewhere [25]. A constant wavelength YLR-100-AC-Y11 laser (IPG Photonics) operating at 1064 nm was used for heating.…”

Section: Methodsmentioning

confidence: 99%

Transformation of diamond to fullerene-type onions at pressure 70 GPa and temperature 2400 K

et al. 2020

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We report the observation of a phase transition of diamond to denser than diamond carbon phase composed from 2 to 3 fullerene-type shells of onions. Raman spectra indicate the fullerene-type of the onions shells. The onions phase is a stable phase in a diamond instability zone of a phase diagram of carbon at pressure 70 GPa and temperature 2400 K. A mixture of diamond and Ni powders was heated by a laser beam under pressure in a diamond anvil cell. Both direct and catalytic diamond to onions transitions were observed during heating. The catalytic transformation includes the following steps. Melting of Ni during the laser heating at pressure 70 GPa, a 'diamond solution' (a transfer of carbon atoms from diamond) in liquid Ni and the formation of an equilibrium carbon phase from the supersaturated solution upon cooling. The catalytic process is a reverse one relative to the catalytic synthesis of diamond in a diamond stability zone at pressure around 6 GPa. The main result of our study is the presence of fullerene-type structures in the phase diagram of carbon in the region of diamond instability under high sub-Mbar pressure and wide range of temperatures.

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Section: Methodsmentioning

confidence: 99%

Transformation of diamond to fullerene-type onions at pressure 70 GPa and temperature 2400 K

et al. 2020

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“…The measured intensity in each pixel (x, y) of the TAOF spectroscopic image is proportional to the intensity of electromagnetic radiation irradiated by an element of the inspected object's surface at a given wavelength λ [4]. Study of the thermal radiation conducted with laser heating (LH-TAOF) system revealed that the intensity of thermal radiation at the selected wavelength was sufficient for recording a hyperspectral image of a video camera when the exposure time is higher than 0.1 s in the temperature range from 1000 to 5000 K [2]. The idea to use an RGB camera for measuring fast thermal processes is straightforward.…”

Section: Methodsmentioning

confidence: 99%

“…For grey bodies, for which emissivity is not dependent on the wavelength, the algorithm of the temperature determination is well developed and is based on method of the least squares (LSQ) [1,5]. In this study, we propose an approach based of the use of the spectral sensitivity curves of the R, G, B sensors and the LSQ method for determination temperature of the grey heated body [1,2]. The distinctive feature of our proposed method is its simplicity and the fact that it allows us to determine the temperature distribution over 3 wide spectral channels, with an unknown emissivity of the object.…”

Section: Methodsmentioning

confidence: 99%

“…The two-dimensional minimization (11) can be reduced to one dimensional minimization taking into account the fact that emissivity  in ( 11) is a linear parameter. This method was described in details elsewhere [1,2]. The function S has a minimum when:…”

Section: Methodsmentioning

confidence: 99%

“…It was demonstrated recently that a tandem acoustooptic filter (TAOF) used in combination with a monochrome camera allows to measure temperature distribution (TD) of laser heated objects with unknown emissivity [1,2]. Temperature distribution measurement with accuracy of less than 3 % is carried out by the method of hyperspectral images of thermal radiation of the heated area of the object [3,4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

RGB color camera for dynamical measurements of high temperature distribution on a surface of the heated solid

Bulatov,

Zinin,

Bykov

et al. 2023

Computer Optics

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In this report we describe a fast 3-color method of the measurement of temperature distributions on a surface of a heated solid using a RGB color camera with a high frame rate (100 images per second). Statistical error the RGB method is not high, and do not exceed around 5.5% which is surprising taking in to account the number of the measurements at each pixel. Comparison of the results of the temperature measurements on a tungsten plate heated by infra-red laser radiation and conducted with this technique and those obtained with the acousto-optical tunable filter technique demonstrate that error of the temperature measured by 3-color method is only two times as high as that of the tandem acousto-optic filter technique method.

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High pressure and high temperature phase transformations of covalent triazine-based frameworks

Khorobrykh

Bulatov

Kutuza

et al. 2023

Materials Chemistry and Physics

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Measurement of the temperature distribution on the surface of the laser heated specimen in a diamond anvil cell system by the tandem imaging acousto-optical filter

Cited by 20 publications

References 32 publications

Transformation of diamond to fullerene-type onions at pressure 70 GPa and temperature 2400 K

Transformation of diamond to fullerene-type onions at pressure 70 GPa and temperature 2400 K

RGB color camera for dynamical measurements of high temperature distribution on a surface of the heated solid

High pressure and high temperature phase transformations of covalent triazine-based frameworks

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