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Measurement of the Laser Beam Position and Width for the Thomson Scattering Diagnostics on Tokamak COMPASS
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SYSNO ASEP 0371331 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Measurement of the Laser Beam Position and Width for the Thomson Scattering Diagnostics on Tokamak COMPASS Author(s) Aftanas, Milan (UFP-V) RID
Bílková, Petra (UFP-V) RID
Böhm, Petr (UFP-V) RID
Weinzettl, Vladimír (UFP-V) RID, ORCID
Stöckel, Jan (UFP-V) RID
Hron, Martin (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDSource Title Proceedings of the 20th Annual Conference of Doctoral Students - WDS 2011 , Part II. - Prague : MATFYZPRESS, 2011 / Šafránková J. ; Pavlů J. - ISBN 978-80-7378-185-9 Pages s. 237-240 Number of pages 4 s. Publication form web - web Action WDS 2011 - Annual Conference of Doctoral Students /20./ Event date 31.05.2011-03.06.2011 VEvent location Prague Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords plasma diagnostics ; Tokamak devices Subject RIV BL - Plasma and Gas Discharge Physics R&D Projects GA202/09/1467 GA ČR - Czech Science Foundation (CSF) 7G10072 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20430508 - UFP-V (2005-2011) Annotation COMPASS tokamak is equipped with new key diagnostic—Thomson scattering system. This unique multi-point system has been designed with the main aim to investigate electron density and temperature profiles on the COMPASS tokamak (R = 0.56 m, a = 0.18 m, BT max = 2.1 T). The spatial resolution is optimized namely for the pedestal studies (radial spatial resolution a/100). This contribution describes particular steps of optical alignment of the important part of the Thomson scattering system, Nd:YAG lasers (1.6 J at 1064 nm, 30 Hz). Laser beam width has to be precisely measured and laser beam position has to be precisely set before the measurement and checked for all laser shots to be able of decrypting the information about the plasma density and also to improve precision of the measurement. New tool for automatic measurement of the laser beam misalignment is introduced. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2012
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