Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
A gradient method has been proposed as an effective procedure to reconstruct real parameters of tokamak plasma by means of multichannel polarimetric measurements. High efficiency of the suggested procedure is illustrated by numerical calculations performed for a given plasma model taking into account the poloidal component of magnetic field. Polarization state of electromagnetic wave traditionally is characterized by azimuthal – ψ and ellipticity – χ angles. Evolution of these parameters along the ray is described by the equations of angular variables technique (AVT) introduced in previous works of the present authors. Numerical simulations have approved that the gradient procedure provides acceptable accuracy of inversion already after several iterations.
Czasopismo
Rocznik
Tom
Strony
281--285
Opis fizyczny
Bibliogr. 10 poz., rys.
Twórcy
autor
- Maritime University Szczecin, 1/2 Wały Chrobrego Str., 70-500 Szczecin, Poland, Tel.: +48 91 480 9313, Fax: +48 91 480 9575
autor
- Maritime University Szczecin, 1/2 Wały Chrobrego Str., 70-500 Szczecin, Poland, Tel.: +48 91 480 9313, Fax: +48 91 480 9575
Bibliografia
- 1. Brix M, Hawkes NC, Boboc A, Drozdov V, Sharapov SE and JET-EFDA Contributors (2008) Accuracy of EFIT equilibrium reconstruction with internal diagnostic information at JET. Rev Sci Instrum 79:10F325
- 2. Chrzanowski J, Kravtsov YuA, Mazon D (2012) Unconventional procedure for inversion of polarimetric data: numerical calculation for a simple model of toroidal plasma. Nukleonika 57;1:37–41
- 3. Czyz ZH, Bieg B, Kravtsov YuA (2007) Complex polarization angle: Relation to traditional polarization parameters and application to microwave plasma polarimetry. Phys Lett A 368:101–107
- 4. Donne AJH, Costley AE, Barnsley R et al. ( 2007) Diagnostics. Chapter 7. Nucl Fusion 47:S337–S384
- 5. Greenstadt J (1967) On the relative efficiencies of gradient methods. Math Comp 21:360–367
- 6. Hestenes MR (1973) Iterative methods for solving linear equations. J Optim Theory Appl 11;4:323–334
- 7. Kravtsov YuA, Chrzanowski J, Mazon D (2011) Algorithm for polarimetry data inversion, consistent with other measuring techniques in tokamak plasma. Eur Phys J D 63;1:135–139
- 8. Kravtsov YuA, Chrzanowski J, Mazon D (2011) Non--conventional procedure of polarimetry data inversion in conditions of comparable Faraday and Cotton-Mouton effects. Fusion Eng Des 86:1163–1165
- 9. 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
- 10. Wesson J (2004) Tokamaks. Clarendon Press, Oxford
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-8e1b5224-d794-40b4-b152-362687a6afb5