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High resolution Thomson scattering on the COMPASS tokamak - extending edge plasma view and increasing repetition rate
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SYSNO ASEP 0489514 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title High resolution Thomson scattering on the COMPASS tokamak - extending edge plasma view and increasing repetition rate Author(s) Bílková, Petra (UFP-V) RID
Böhm, Petr (UFP-V) RID
Aftanas, Milan (UFP-V) RID
Šos, Miroslav (UFP-V) ORCID
Havránek, Aleš (UFP-V) ORCID
Šesták, David (UFP-V) RID
Weinzettl, Vladimír (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDArticle number C01024 Source Title Journal of Instrumentation. - : Institute of Physics Publishing - ISSN 1748-0221
Roč. 13, č. 1 (2018)Number of pages 10 s. Publication form Print - P Action International Symposium on Laser-Aided Plasma Diagnostics (LAPD2017) /18./ Event date 24.09.2017 - 28.09.2017 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country GB - United Kingdom Keywords Plasma diagnostics - interferometry ; spectroscopy and imaging ; Trigger concepts and systems (hardware and software) Subject RIV BL - Plasma and Gas Discharge Physics OECD category 2.11 Other engineering and technologies R&D Projects GA14-35260S GA ČR - Czech Science Foundation (CSF) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 UT WOS 000422899200007 EID SCOPUS 85041453963 DOI 10.1088/1748-0221/13/01/C01024 Annotation The Thomson scattering (TS) diagnostic system on the COMPASS tokamak consists of separate collection optics for core and edge plasmas. Till now, the adverse orientation of the viewport available for the edge TS limited the investigated plasma scenarios to those, where H-mode plasma pedestal was possible to be observed. The vacuum vessel port has been recently modified and directed more to the plasma edge. To bridge the time for designing and manufacturing a new lens, the so far used edge TS collection lens was tilted and the fibre bundles rearranged to comply with the new geometry. However, the full potential of the new port is utilized only by the newly designed and manufactured lens. Comparison of performance of the collection lenses before and after the viewport modification is presented. Apart from the edge collection system upgrade, the laser system was extended by two lasers with parameters similar to the original two, thus increasing the repetition rate of the TS system to 120 Hz or allowing to obtain four profiles with tight timing in order to measure fast transient events in the plasma. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019
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