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Author Kravtsov, Yu.A.
Affiliation Maritime University of Szczecin, Faculty of Maritime Engineering, Department of Physics Akademia Morska w Szczecinie, Wydział Mechaniczny, Katedra Fizyki 70-500 Szczecin, ul. Wały Chrobrego 1–2 Space Research Institute, Moscow 117997, Profsoyuznaya St. 82/34, Russia
Author Bieg, Bohdan
Affiliation Maritime University of Szczecin, Faculty of Maritime Engineering, Department of Physics Akademia Morska w Szczecinie, Wydział Mechaniczny, Katedra Fizyki 70-500 Szczecin, ul. Wały Chrobrego 1–2
E-mail b.bieg@am.szczecin.pl
Author Hirsch, Matthias
Affiliation Max Planck Institute for Plasma Physics, D-17491 Greifswald, Wendelsteinstrasse, Germany
ISSN printed 1733-8670
URI https://repository.am.szczecin.pl/handle/123456789/315
Abstract The interferometer-polarimeter in the stellarator W7-X will operate in the far infrared band in the double passage regime: the electromagnetic beam will be reflected back from a corner cube retroreflector and thus pass through the magnetized plasma twice. Evolution of the polarization state of the beam along the polarimeter sightline in the standard magnetic field configuration of W7-X is analyzed on the basis of differential equations, for traditional polarization parameters – azimuthal angle  and ellipticity angle . The influence of the Faraday and the Cotton-Mouton phenomena on polarization parameters  and  are analyzed. Calculations are performed for different plasma densities. Finally the potential sources of inaccuracy are considered, such as the shift in the probing beam position
Pages 5–9
Publisher Scientific Journals of the Maritime University of Szczecin, Zeszyty Naukowe Akademii Morskiej w Szczecinie
Keywords Faraday
Keywords Cotton-Mouton
Keywords plasma density
Title Numerical modeling of polarization effects in a plasma at the W7-X stellarator
Type Original scientific article
References
  1. FUCHS CH., HARTFUSS H.J.: Line integrated density meas-urements based on Cotton–Mouton polarimetry. Rev. Sci. Instrum., 1999, 70, 722–725.
  2. GUENTHER K.: Approximate method to extract the pure Faraday and Cotton–Mouton effects from polarimetry measurements in a tokamak. Plasma Phys. Control. Fusion, 2004, 46, 1423–1441.
  3. SEGRE S. E., ZANZA V.: Derivation of the pure Faraday and Cotton–Mouton effects when polarimetric effects in a to-kamak are large. Plasma Phys. Control. Fusion, 2006, 48, 339–351. Others:
  4. CZYZ Z.H., BIEG B., KRAVTSOV YU.A.: Complex polariza-tion angle: Relation to traditional polarization parameters and application to microwave plasma polarimetry. Phys. Let. A, 2007, 368, 101–107.
  5. SEGRE S.E.: A review of plasma polarimetry – theory and methods. Plasma Phys. Control. Fusion, 1999, 41, R57–R100.
ISSN on-line 2392-0378
Language English
Funding No data
Figures 6
Tables 0
Published 2011-06-10
Accepted 2011-05-10
Recieved 2011-04-14


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