Localized plasma polarimetry based on the phenomenon of normal mode conversion

• Autorzy: Kravtsov , Y. A. , Bieg B.
• Konferencja: 9th Kudowa Summer School „Towards Fusion Energy”
• Języki publikacji: EN

Abstrakty

EN

A new geometry of microwave polarimetric measurements is presented, which realizes a localized plasma polarimetry based on the phenomenon of electromagnetic mode conversion. Such a conversion takes place in the tokamak plasma, in the vicinity of the point where the microwave beam is orthogonal to one of the helical magnetic lines. In distinction to the traditional plasma polarimetry, which deals with the line averaged plasma parameters, the new methodology allows for a measurement of the local values of plasma parameters near the point of orthogonality. This methodology was shown to be very efficient in studies of the solar radio emission and polarization properties of radio waves passing through the Earth ionosphere. In the following the theory of electromagnetic mode conversion is described and conditions of its applicability are analyzed. It is shown that localized polarimetric measurements of plasma parameters in the geometry of the international thermonuclear experimental reactor (ITER) device would require very high electron densities Ne, exceeding 1017 cm–3, i.e. thousand times higher than those envisaged in the ITER project.

Słowa kluczowe

EN

plasma; polarimetry; mode conversion

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2011
• Tom: Vol. 56, No. 2
• Strony: 171--174
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Kravtsov , Y. A.

autor

Bieg B.

• Institute of Physics, Maritime University of Szczecin, 1/2 Wały Chrobrego Str., 70-500 Szczecin, Poland and Space Research Institute RAS, 82/34 Profsoyuznaya Str., Moscow 117997, Russia, Tel.: [phone], Fax: [phone],

Bibliografia

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• 6. Kravtsov YuA, Naida ON, Fuki AA (1996) Waves in weakly anisotropic 3D inhomogeneous media: quasi-isotropic approximation of geometrical optics. Physics-Uspekhi 39:129–154
• 7. Kravtsov YuA, Orlov YuI (1990) Geometrical optics of inhomogeneous media. Springer, Berlin
• 8. Zheleznyakov VV, Kocharovskiy VV, Kocharovski ViV (1983) Linear coupling of electromagnetic waves in inhomogeneous weakly-ionized media. Sov Phys Uspekhi 26:877–905
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