On the Causes of Anomaly in the Polarimetric Measurements at JET (Articolo in rivista)

Type
Label
  • On the Causes of Anomaly in the Polarimetric Measurements at JET (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1109/TPS.2012.2186811 (literal)
Alternative label
  • Enrico Zilli; Matteo Brombin; Alexandru Boboc; Andrea Murari; JET-EFDA Contibutors (2012)
    On the Causes of Anomaly in the Polarimetric Measurements at JET
    in IEEE transactions on plasma science; IEEE-Institute Of Electrical And Electronics Engineers Inc., Piscataway (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Enrico Zilli; Matteo Brombin; Alexandru Boboc; Andrea Murari; JET-EFDA Contibutors (literal)
Pagina inizio
  • 1142 (literal)
Pagina fine
  • 1148 (literal)
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  • Article number: 6161656 La rivista è pubblicata anche online con ISSN 1939-9375. (literal)
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  • http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6161656 (literal)
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  • 40 (literal)
Rivista
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  • 7 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • E. Zilli, M. Brombin, and A. Murari are with the Consorzio RFX, Associazione EURATOM-ENEA sulla Fusione, 35127 Padova, Italy. A. Boboc is with the EURATOM/CCFE, Culham Science Centre, OX14 3DB Oxon, U.K. (literal)
Titolo
  • On the Causes of Anomaly in the Polarimetric Measurements at JET (literal)
Abstract
  • A recent investigation of an anomaly in the polarimetric measurements at the Joint European Torus (JET) is reported. A calculation, based on the Stokes vector and the Mueller matrix method, has been developed to simulate the effects of the waveguide on the polarization of the propagating beams. These effects consist in both rotations of the polarization and alterations of the ellipticity, and affect both the probing and the reference beams. The model that is assumed here is made up of a rotated retarder followed by a rotator, with three free parameters to be optimized. A very good agreement between the resulting calculated curves and the experimental calibration diagrams is obtained for the four vertical channels of JET polarimeter. Variations of both phase shift and amplitude ratio are fitted by the model. This result supports the hypothesis that the waveguide system, which transfers the beams from the torus to the detectors, is the main source of the anomaly. (literal)
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