Possible accuracy of the Cotton-Mouton polarimetry in a sheared toroidal plasma

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

Abstrakty

EN

The Cotton-Mouton effect in the sheared plasma with helical magnetic lines is studied, using the equation for the complex amplitude ratio (CAR). A simple model for helical magnetic lines in plasma of toroidal configuration is suggested. Equation for CAR is solved perturbatively, treating the shear angle variations as a small perturbation, caused by the spiral form of the magnetic lines. It is shown that the uncertainty of the polarization measurements in the toroidal plasma with a spiral form of the magnetic lines does not exceed 1.0–2.0%, which determines the limiting accuracy of the Cotton-Mouton polarimetry. It is furthermore pointed out that the method of a priori subtraction of the “sheared” term may significantly improve the accuracy of the Cotton-Mouton polarimetry.

Słowa kluczowe

EN

diagnostics plasma; Cotton-Mouton effect; complex polarization angle

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2011
• Tom: Vol. 56, No. 2
• Strony: 175--177
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Kravtsov , Y. A.

autor

Chrzanowski J.

• 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

• 1. Allis WP, Buchsbaum SJ, Bers A (1963) Waves in anisotropic plasma. MIT Press, Cambridge
• 2. Born M, Wolf E (1999) Principles of optics, 7th ed. Cambridge, University Press
• 3. Donne JM, Edlington MT, Joffrin E et al. (1999) Poloidal polarimeter system for current density measurements in ITER. Rev Sci Instrum 70:726–729
• 4. Fuki AA, Kravtsov YuA, Naida ON (1997) Geometrical optics of weakly anisotropic media. Gordon and Breach, London, New York
• 5. Ginzburg VI (1970) Propagation of electromagnetic waves in plasma. Gordon and Breach, New York
• 6. Huard S (1997) Polarization of light. Wiley, Masson
• 7. Kravtsov YuA (1969) Quasi-isotropic geometrical optics approximation. Sov Phys Doklady 13;11:1125–1127
• 8. Kravtsov YuA (2005) Geometrical optics in engineering physics. Alpha Science International, Harrow
• 9. Kravtsov YuA, Bieg B (2010) Evolution of complex amplitudes ratio in weakly anisotropic plasma. J Plasma Phys 76;5:795–807
• 10. Kravtsov YuA, Bieg B (2010) Localized microwave plasma polarimetry, based on circular modes conversion: theoretical prerequisites and practical limitations. Plasma Phys Control Fusion 52:022001
• 11. Kravtsov YuA, Chrzanowski J (2011) Accuracy of the Cotton-Mouton polarimetry in the sheared toroidal plasma of circular cross-section. Centr Eur J Phys 9;1:123–130
• 12. Kravtsov YuA, Naida ON, Fuki AA (1996) Waves in weakly anisotropic 3D-inhomogeneous media: quasi-isotropic approximation of geometric optics. Physics-Uspekhi 39:129–154
• 13. Kravtsov YuA, Orlov YuI (1990) Geometrical optics of inhomogeneous media. Springer, Berlin
• 14. Segre SE (1999) A review of plasma polarimetry – theory and methods. Plasma Phys Control Fusion 41:R57–R100
• 15. Segre SE (2001) New formalism for the analysis of polarization evolution for radiation in a weakly non uniform, fully anisotropic medium: a magnetized plasma. J Opt Soc Am A 18:2601–2606
• 16. Wesson J (2004) Tokamaks. Clarendon Press, Oxford