A photoelastic-modulator-based motional Stark effect polarimeter for ITER that is insensitive to polarized broadband background reflections.
Identifieur interne : 001B41 ( PubMed/Curation ); précédent : 001B40; suivant : 001B42A photoelastic-modulator-based motional Stark effect polarimeter for ITER that is insensitive to polarized broadband background reflections.
Auteurs : A. Thorman [Australie] ; C. Michael [Australie] ; M. De Bock [France] ; J. Howard [Australie]Source :
- The Review of scientific instruments [ 1089-7623 ] ; 2016.
Abstract
A motional Stark effect polarimeter insensitive to polarized broadband light is proposed. Partially polarized background light is anticipated to be a significant source of systematic error for the ITER polarimeter. The proposed polarimeter is based on the standard dual photoelastic modulator approach, but with the introduction of a birefringent delay plate, it generates a sinusoidal spectral filter instead of the usual narrowband filter. The period of the filter is chosen to match the spacing of the orthogonally polarized Stark effect components, thereby increasing the effective signal level, but resulting in the destructive interference of the broadband polarized light. The theoretical response of the system to an ITER like spectrum is calculated and the broadband polarization tolerance is verified experimentally.
DOI: 10.1063/1.4958648
PubMed: 27475556
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Michael</name><affiliation wicri:level="1"><nlm:affiliation>Plasma Research Laboratory, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Plasma Research Laboratory, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200</wicri:regionArea></affiliation></author><author><name sortKey="De Bock, M" sort="De Bock, M" uniqKey="De Bock M" first="M" last="De Bock">M. De Bock</name><affiliation wicri:level="1"><nlm:affiliation>ITER Organization, Route de Vinon-sur-Verdon, 13067 St Paul-lez-Durance, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>ITER Organization, Route de Vinon-sur-Verdon, 13067 St Paul-lez-Durance</wicri:regionArea></affiliation></author><author><name sortKey="Howard, J" sort="Howard, J" uniqKey="Howard J" first="J" last="Howard">J. Howard</name><affiliation wicri:level="1"><nlm:affiliation>Plasma Research Laboratory, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Plasma Research Laboratory, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200</wicri:regionArea></affiliation></author></analytic><series><title level="j">The Review of scientific instruments</title><idno type="eISSN">1089-7623</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A motional Stark effect polarimeter insensitive to polarized broadband light is proposed. Partially polarized background light is anticipated to be a significant source of systematic error for the ITER polarimeter. The proposed polarimeter is based on the standard dual photoelastic modulator approach, but with the introduction of a birefringent delay plate, it generates a sinusoidal spectral filter instead of the usual narrowband filter. The period of the filter is chosen to match the spacing of the orthogonally polarized Stark effect components, thereby increasing the effective signal level, but resulting in the destructive interference of the broadband polarized light. The theoretical response of the system to an ITER like spectrum is calculated and the broadband polarization tolerance is verified experimentally.</div></front></TEI><pubmed><MedlineCitation Status="In-Data-Review" Owner="NLM"><PMID Version="1">27475556</PMID><DateCreated><Year>2016</Year><Month>08</Month><Day>01</Day></DateCreated><DateRevised><Year>2016</Year><Month>08</Month><Day>01</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1089-7623</ISSN><JournalIssue CitedMedium="Internet"><Volume>87</Volume><Issue>7</Issue><PubDate><Year>2016</Year><Month>Jul</Month></PubDate></JournalIssue><Title>The Review of scientific instruments</Title><ISOAbbreviation>Rev Sci Instrum</ISOAbbreviation></Journal><ArticleTitle>A photoelastic-modulator-based motional Stark effect polarimeter for ITER that is insensitive to polarized broadband background reflections.</ArticleTitle><Pagination><MedlinePgn>073504</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1063/1.4958648</ELocationID><Abstract><AbstractText>A motional Stark effect polarimeter insensitive to polarized broadband light is proposed. Partially polarized background light is anticipated to be a significant source of systematic error for the ITER polarimeter. The proposed polarimeter is based on the standard dual photoelastic modulator approach, but with the introduction of a birefringent delay plate, it generates a sinusoidal spectral filter instead of the usual narrowband filter. The period of the filter is chosen to match the spacing of the orthogonally polarized Stark effect components, thereby increasing the effective signal level, but resulting in the destructive interference of the broadband polarized light. 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