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Using microwave refraction to determine local inhomogeneities of a rotating plasma

Martseniuk Yurii P., Siusko Yevhen V., Kovtun Yurii V.

Nukleonika

2023

Vol. 68, No. 1

19--24

To determine the local inhomogeneities of a rotating plasma, the method based on microwave refraction was used. The method is based on spectral and correlation analysis of the refl ected signals from the rotating plasma layer at normal and inclined microwave incidence. This method allowed us to determine local inhomogeneities of plasma electron density, angles of azimuthal displacement of grooves, and its angular frequency of rotation. Using an additional 4th horn antenna, in contrast to previous works, it was possible to fi nd and analyze two regions with azimuthal inhomogeneities in the rotating plasma. Analysis of the refl ected signals shows the presence of four grooves, and the angular frequency of rotation  = 1.16 × 104 rad/s was also determined.

Porous glass: inhomogeneities and light transmission.

Antropova T.V., Drozdova I.A., Yastrebov S.G., Evstrapov A.A.

Optica Applicata

2000

Vol. 30, nr 4

553-568

Basic optical characteristics were studied to reveal the structure of porous glass samples. Acid leaching technology was used to manufacture porous glasses from the bulk of phase-separated alkali borosilicate glasses. The transmission electron microscopy, selected area diffraction and shadow graph techniques, optical microscopy and spectrophotometry, reflective ellipsometry were used to obtain new information about some inhomogeneities such as strata and spindle-like silica precipitates as well as boron containing microcrystalline phases inside porous glasses.