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A. B. Tsyganov
A. B. Tsyganov
Saint Petersburg State Mining University
Saint Petersburg State Mining University
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Articles

Nanotechnologies and information technologies
  • Date submitted
    2016-11-22
  • Date published
    2012-02-01

Microplasma analytical sensor for gas mixtures diagnostics

Theoretical consideration of collision electron spectroscopy (CES) for gaseous media analysis and experimental results on CES detector are presented. It is demonstrated that a diffusion path confinement for characteristic electrons provides a  possibility to measure electrons energy distribution function and to find characteristic spectra of species at high (up to atmospheric) gas pressure. Simple micro-plasma CES detector of two plane parallel electrode configuration with  current-voltage measurement in afterglow of helium glow discharge may be designed to operate at a high gas pressure up to atmospheric one. Experimental electron energy spectra of pair He metastables collisions in dependence of interelectrode gap are discussed.

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A. S. Mustafaev, A. B. Tsyganov (2012) Microplasma analytical sensor for gas mixtures diagnostics. Journal of Mining Institute. Vol 196. p. 347.
Applied and fundamental research in physics and mathematics
  • Date submitted
    2016-12-14
  • Date published
    2010-03-01

The measurements of emission parameters of tungsten thermo cathodes in plasma energetic equipments

Emission parameters and coefficients of reflection of heat electrons from tungsten thermo cathodes were investigated under nontraditional for emission electronic conditions, when the surface contacts with highly ionized plasma. For measurements plasma diode electron current-magnetic field strength relations were used. Parameter Dj, which characterizes cathode heterogeneity by work function, and coefficient of reflection  for policrystallic tungsten and for face 110 tungsten single crystal were measured. Proportion entering in effective reflection coefficient of electrons, reflected immediately from the surface and from potential barrier of spots field was determinate.

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A. S. Mustafaev, N. S. Pshchelko, A. V. Morin, A. B. Tsyganov (2010) The measurements of emission parameters of tungsten thermo cathodes in plasma energetic equipments. Journal of Mining Institute. Vol 187. p. 91.
Applied and fundamental research in physics and mathematics
  • Date submitted
    2016-12-14
  • Date published
    2010-03-01

Linear ccd-sensors based multiprocessor photometer system for spectral analysis

There is presented a multiprocessor photometric CCD-system for a wide range of spectrometers and for various spectral analysis methods implementation.

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A. S. Mustafaev, A. B. Tsyganov, B. V. Dobrolezh (2010) Linear ccd-sensors based multiprocessor photometer system for spectral analysis. Journal of Mining Institute. Vol 187. p. 98.
Applied and fundamental research in physics and mathematics
  • Date submitted
    2016-12-15
  • Date published
    2010-03-01

Studies of resistance micro-welding modes for dentistry applications

Various modes of resistance welding between steel and Ni-Ti-extracting electrodes and fractures of endodontic files were investigated. It was demonstrated that in close to real clinical situations there is most suitable a sequence of a number of pulses of a steepened welding current. As a result, detachment force limit of 15-50 N is achievable which is sufficient for the fracture extraction in most cases.

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A. B. Tsyganov, A. S. Mustafaev (2010) Studies of resistance micro-welding modes for dentistry applications. Journal of Mining Institute. Vol 187. p. 146.