Design of new Thomson scattering diagnostic system on COMPASS tokamak

0349752 - ÚFP 2011 RIV NL eng J - Journal Article
Bílková, Petra - Aftanas, Milan - Böhm, Petr - Weinzettl, Vladimír - Šesták, David - Melich, Radek - Stöckel, Jan - Scannell, R. - Walsh, M.
Design of new Thomson scattering diagnostic system on COMPASS tokamak.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 623, č. 2 (2010), s. 656-659. ISSN 0168-9002. E-ISSN 1872-9576.
[International Conference on Frontiers in Diagnostic Technologies/1st./. Frascati, 25.11.2009-27.11.2009]
R&D Projects: GA ČR GA202/09/1467; GA ČR GD202/08/H057
Institutional research plan: CEZ:AV0Z20430508
Keywords : Thomson scattering * Laser diagnostic * Electron temperature * Electron density
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.142, year: 2010
www.elsevier.com/locate/nima

Two new Thomson scattering (TS) diagnostic systems are being built on the COMPASS tokamak to get radial profiles of both electron temperature and electron density. The core TS system will measure at 24 spatial points with ≈ 10 mm resolution across the core plasma while the edge TS system will measure at 32 spatial points with ≈ (3-5) mm resolution across the edge plasma. Two independent Nd:YAG lasers (1.5 J, 30 Hz each) could be combined to produce a repetition rate of 60 Hz. The lasers will follow separate beam paths to the COMPASS vessel. Scattered light will be collected by two objectives, one for the core region, the second for the plasma edge. Both TS systems are based on Nd:YAG/APD (Avalanche photodiodes) technology. Scattered light is spectrally resolved in polychromators equipped with a set of spectral filters and APDs. The output signal is digitized by fast sampling (GS/s) 8-bit analog digital converters (ADCs).
Permanent Link: http://hdl.handle.net/11104/0189907