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The prototype imaging motional Stark effect diagnostic for ASDEX upgrade

Ford, O.P.; Howard, John; Wolf, Robert

Description

This paper presents the development and testing of the prototype Imaging Motional Stark-Effect (IMSE) diagnostic, designed for ASDEX upgrade. A detailed description of the core hardware, theory of operation, and application to complex MSE spectra are presented and analytical evaluation methods suitable for the required accuracy are developed. The diagnostic is tested with a MSE-like polarised spectrum to assess the accuracy of different modulation modes suggested in previous works. Each is...[Show more]

dc.contributor.authorFord, O.P.
dc.contributor.authorHoward, John
dc.contributor.authorWolf, Robert
dc.date.accessioned2016-02-24T22:41:12Z
dc.identifier.issn0034-6748
dc.identifier.urihttp://hdl.handle.net/1885/98603
dc.description.abstractThis paper presents the development and testing of the prototype Imaging Motional Stark-Effect (IMSE) diagnostic, designed for ASDEX upgrade. A detailed description of the core hardware, theory of operation, and application to complex MSE spectra are presented and analytical evaluation methods suitable for the required accuracy are developed. The diagnostic is tested with a MSE-like polarised spectrum to assess the accuracy of different modulation modes suggested in previous works. Each is found to have small systematic errors due to non-ideal effects of the components, which must be carefully examined. In particular, the effect of intrinsic contrast that results from imperfect parallelism of the birefringent plates is found to have a strong effect. Methods to mitigate and correct for this are discussed. With the necessary corrections and calibrations, the accuracy of polarisation orientation is shown to be within ±0.2°. The effect of finite ellipticity is examined and the possibility to measure this to an accuracy of ±2.0° is demonstrated. The system is shown to be insensitive to broadband polarised background light, temperature variations, and critically to variations in the details of the MSE spectrum.
dc.publisherAmerican Institute of Physics (AIP)
dc.rightsAuthor/s retain copyright
dc.sourceReview of Scientific Instruments
dc.titleThe prototype imaging motional Stark effect diagnostic for ASDEX upgrade
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume86
dc.date.issued2015
local.identifier.absfor020200 - ATOMIC, MOLECULAR, NUCLEAR, PARTICLE AND PLASMA PHYSICS
local.identifier.ariespublicationU3488905xPUB6376
local.type.statusPublished Version
local.contributor.affiliationFord, O.P., Max Planck Institute for Plasma Physics
local.contributor.affiliationHoward, John, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationWolf, Robert, Max Planck Institut fuer Plasmaphysik
local.bibliographicCitation.issue9
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage11
local.identifier.doi10.1063/1.4929873
dc.date.updated2016-02-24T10:10:09Z
local.identifier.scopusID2-s2.0-84941308449
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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