Mechanical design of the two dimensional beam emission spectroscopy diagnostics on mast

A two dimensional beam emission spectroscopy (BES) system optimized for density turbulence measurements has recently been installed on the MAST tokamak. This system observes the emission of a Deuterium heating beam using a rotatable mirror to view from the plasma centre to the outboard edge (0.7–1.5...

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Bibliographic Details
Published in:Fusion engineering and design 2011-10, Vol.86 (6), p.1315-1318
Main Authors: Kiss, István Gábor, Mészáros, Botond, Dunai, Dániel, Zoletnik, Sándor, Krizsanóczi, Tibor, Field, Anthony R., Gaffka, Rob
Format: Article
Language:English
Subjects:
Applied sciences
Arrays
Beams (radiation)
BES
Controled nuclear fusion plants
Density
Design engineering
Detectors
Diagnostics
Emission spectroscopy
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heating
Installations for energy generation and conversion: thermal and electrical energy
MAST
Masts
Turbulence measurements
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Summary:A two dimensional beam emission spectroscopy (BES) system optimized for density turbulence measurements has recently been installed on the MAST tokamak. This system observes the emission of a Deuterium heating beam using a rotatable mirror to view from the plasma centre to the outboard edge (0.7–1.5 m), although the optics is optimized for core region (1.2 m). The beam is imaged onto a 4×8 pixel Avalanche Photodiode (APD) array detector, enabling measurements with 1 MHz bandwidth at photon-flux level of few times 10 11 photons/s. This article will present the mechanical design of MAST BES equipment with special emphasis on its in-vessel components.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2010.11.027