Light extinction method for diagnostics of particles sizes formed in magnetic field

Мышкин, В. Ф.; Izhoykin, Dmitry A.; Grigoriev, Alexander; Gamov, Denis L.; Leont’eva, D. A.

doi:10.1063/1.5027219

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…Information on Zn particles with sizes less than 140 nm could not be obtained from data on the transmittance of optical radiation in the range 420-630 nm. This we attribute to the fact that the influence of the fine fraction of metallic Zn on the spectral course of transmittance is much less than that of the larger fraction due to both the factor of efficiency of interaction with optical radiation and the ratio of particle concentrations [24].…”

Section: Resultsmentioning

confidence: 88%

Particularities of Cu and Zn nanoparticles formation in a magnetic field

Мышкин

Khan

Tichý

et al. 2019

AIP Conference Proceedings

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We studied experimentally the condensation of Zn and Cu vapors from a high-temperature gas in an external weak constant magnetic field. We observed at all applied conditions, a chaotic time shift of the maximum of the size distribution function of dispersed particles. Simultaneously, a decrease in the width of the size distribution function of dispersed Zn particles from 40 nm (0 mT) to 10 nm (44 mT or 76 mT) was observed. The sizes of Zn particles were determined by laser probing. The sizes of dispersed Cu particles, determined by analyzing a substrate sample, were in the range of 10-400 nm without a magnetic field, and the range 30-320 nm in a magnetic field of 30 mT. The authors explain the observed results by arranging the dynamics of the spin pair of unpaired electrons of an atom from the gas phase and of an atom on the surface of a condensed particle in a magnetic field. Therefore, in a magnetic field, when an atom collides with a dispersed particle or condensation nucleus, the probability of creation of a singlet pair of spins of unpaired electrons is higher than that without a field.

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Section: Resultsmentioning

confidence: 88%

Particularities of Cu and Zn nanoparticles formation in a magnetic field

Мышкин

Khan

Tichý

et al. 2019

AIP Conference Proceedings

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“…However, when the data of the scattering indicatrix are burdened with higher measuring uncertainty, the solution of the inverse problem diverges -there are many possible solutions that formally satisfy the integral equation. To avoid the problem we used the approach described by us in [16]. In the Table 1 below, we show the data on the relative amount of powder particles of different sizes, which we have obtained after processing one of the experimentally recorded low-angle scattering indicatrix.…”

Section: The Experimental Resultsmentioning

confidence: 99%

Registration of a laser beam scattered from an aerosol located in the probe beam aperture

Мышкин

Khan

Tichý

et al. 2019

AIP Conference Proceedings

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An experimental setup has been developed that allows recording the flux of probing radiation scattered from dispersed particles in the 0° direction. To suppress the beam passing through the swarm of dispersed particles a reference beam was used. The reference beam was formed from the probe beam and aligned in the registration plane with the beam passing through the swarm of particles. The Michelson interferometer was tested in an experimental setup to determine the sizes of dust particles of heterogeneous systems. It was shown that by placing a heterogeneous system in one of the arms of the interferometer, it was possible to register the scattered radiation at the angle 0°. This facilitates calculation of the sizes of particles with the same accuracy over the entire size range. To verify the method the iron powder particles sized 50-63 µm were used.

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Light extinction method for diagnostics of particles sizes formed in magnetic field

Cited by 2 publications

References 20 publications

Particularities of Cu and Zn nanoparticles formation in a magnetic field

Particularities of Cu and Zn nanoparticles formation in a magnetic field

Registration of a laser beam scattered from an aerosol located in the probe beam aperture

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