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A. Yu. Grabovskii
A. Yu. Grabovskii
Saint Petersburg State Mining University
Saint Petersburg State Mining University
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Articles

Humanities and fundamental researches
  • Date submitted
    2016-10-28
  • Date published
    2013-07-01

Cylindrical probe in anisotropic plasma: how can we achieve reliable results?

It has been demonstrated, that cylindrical probe in anisotropic plasma allows to measure only the even components of the electron velocity distribution expansion. For the first time the method for determining the odd moments of the distribution function by solving a system of ki-netic Boltzmann equations, connecting the even and odd moments ( f 0 , f 1 ); ( f 0 , f 1 , f 2 ) etc. has been developed. The method was tested in plasma of low-voltage beam discharge in helium. The experimental probe I- V traces for different orientations of a cylindrical probe with respect to the axis of symmetry of the plasma has been obtained. The moments of f 0 and f 2 has been cal-culated, f 1 moment is defined by solving the «vector» kinetic equation. The accuracy of f 1 calculation controlled by coincidence of calculated and measured values of discharge current. Theoretical and experimental values are in a good agreement.

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A. S. Mustafaev, A. Yu. Grabovskii (2013) Cylindrical probe in anisotropic plasma: how can we achieve reliable results?. Journal of Mining Institute. Vol 206. p. 226.
Humanities and fundamental researches
  • Date submitted
    2016-10-28
  • Date published
    2013-07-01

Diagnostics of the mirror-symmetrical plasma by probes of various geometry

This paper deals with the further development of the probe method for the investigation of the anisotropic plasma. The theoretical basis of the method for determining the full electron velocity distribution function in the mirror-symmetric plasma has been developed. For probes of different geometries the analytical expressions, which connects the second derivative of probe current with respect to the potential with the multipole moments of the electron velocity distribution function has been obtained.

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A. S. Mustafaev, A. Yu. Grabovskii (2013) Diagnostics of the mirror-symmetrical plasma by probes of various geometry. Journal of Mining Institute. Vol 206. p. 231.
Nanotechnologies and information technologies
  • Date submitted
    2016-11-22
  • Date published
    2012-02-01

Method of measurement of anisotropic electron velocity distribution function

The method  of local anisotropic plasma has been  developed. The mathematical apparatus  of the method for rapid analysis of the  degree  of anisotropy  electron  distribution  function,  as one of the main characteristics of anisotropic plasma has been proposed. It has been  demonstrated that the degree of anisotropy of the plasma can be determined only by the form of the IU  curve (the second derivative of probe current to the probe potential). The possibilities of the method in area of reconstruction of the  full  distribution  function have been illustrated.

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A. S. Mustafaev, A. Yu. Grabovskii (2012) Method of measurement of anisotropic electron velocity distribution function. Journal of Mining Institute. Vol 196. p. 336.