Elevation angle alignment of quasi optical receiver mirrors of collective Thomson scattering diagnostic by sawtooth measurements

D. Moseev, Fernando Meo, Søren Bang Korsholm, Henrik Bindslev, V. Furtula, M. Kantor, Frank Leipold, Poul Michelsen, Stefan Kragh Nielsen, Mirko Salewski, Morten Stejner Pedersen

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Abstract

Localized measurements of the fast ion velocity distribution function and the plasma composition measurements are of significant interest for the fusion community. Collective Thomson scattering (CTS) diagnostics allow such measurements with spatial and temporal resolution. Localized measurements require a good alignment of the optical path in the transmission line. Monitoring the alignment during the experiment greatly benefits the confidence in the CTS measurements. An in situ technique for the assessment of the elevation angle alignment of the receiver is developed. Using the CTS diagnostic on TEXTOR without a source of probing radiation in discharges with sawtooth oscillations, an elevation angle misalignment of 0.9◦ was found with an accuracy of 0.25◦. © 2012 American Institute of Physics
Original languageEnglish
JournalReview of Scientific Instruments
Volume83
Pages (from-to)10E337
Number of pages3
ISSN0034-6748
DOIs
Publication statusPublished - 2012
Event19th Topical Conference on High-Temperature Plasma Diagnostics - Monterey, CA, United States
Duration: 6 May 201210 May 2012

Conference

Conference19th Topical Conference on High-Temperature Plasma Diagnostics
CountryUnited States
CityMonterey, CA
Period06/05/201210/05/2012

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