Outline of optical design and viewing geometry for divertor Thomson scattering on MAST upgrade

0421348 - ÚFP 2014 RIV GB eng J - Článek v odborném periodiku
Hawke, J. - Scannell, R. - Harrison, J. - Huxford, R. - Böhm, Petr
Outline of optical design and viewing geometry for divertor Thomson scattering on MAST upgrade.
Journal of Instrumentation. Roč. 8, č. 11 (2013), C11010-C11010. ISSN 1748-0221. E-ISSN 1748-0221.
[International Symposium Laser Aided Plasma Diagnostics/16./. Madison, 22.09.2013-26.09.2013]
Institucionální podpora: RVO:61389021
Klíčová slova: Plasma diagnostics - interferometry * Spectroscopy and imaging * Optics * Plasma diagnostics - charged-particle spectroscopy
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 1.526, rok: 2013
http://iopscience.iop.org/1748-0221/8/11/C11010/pdf/1748-0221_8_11_C11010.pdf

The super-X divertor on MAST Upgrade will be diagnosed by a Thomson scattering diagnostic. A preliminary design of the collection optics and calculations of the diagnostic's performance are discussed in this paper. As part of the design the location and size of the collection cell were optimized to minimize vignetting, especially in the region of interest close to the divertor strike point. The design process was complicated by the limited access available in the closed divertor geometry. In the study of the diagnostic's performance, the radial resolution, projection of the laser image onto the fiber bundle, and impact of depth of field with a multiple laser system were investigated. In this design there is a trade-off between the resolution of the system and the lifetime of the beam dump. For this reason the beam has its focal point at the start of the viewing region and diverges in width to approximately five millmetrs near the divertor tile. The effect of this large variation
Trvalý link: http://hdl.handle.net/11104/0227725