Plasma radiation dynamics with the upgraded Absolute Extreme Ultraviolet tomographical system in the Tokamak à Configuration Variable

We introduce an upgraded version of a tomographical system which is built up from Absolute Extreme Ultraviolet-type (AXUV) detectors and has been installed on the Tokamak à Configuration Variable (TCV). The system is suitable for the investigation of fast radiative processes usually observed in magn...

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Bibliographic Details
Published in:Review of scientific instruments 2013-12, Vol.84 (12), p.123508-123508
Main Authors: Tal, B, Labit, B, Nagy, D, Chavan, R, Duval, B, Veres, G
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Configurations
Coupling
DESIGN
Design modifications
Detectors
Diagnostic systems
Dynamical systems
Dynamics
ERRORS
EVALUATION
EXTREME ULTRAVIOLET RADIATION
High temperature plasmas
HOT PLASMA
MODIFICATIONS
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
Plasma radiation
SAFETY
Scientific apparatus & instruments
Sensitivity analysis
Shutters
TCV TOKAMAK
Tokamak devices
WALL EFFECTS
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Summary:We introduce an upgraded version of a tomographical system which is built up from Absolute Extreme Ultraviolet-type (AXUV) detectors and has been installed on the Tokamak à Configuration Variable (TCV). The system is suitable for the investigation of fast radiative processes usually observed in magnetically confined high-temperature plasmas. The upgrade consists in the detector protection by movable shutters, some modifications to correct original design errors and the improvement in the data evaluation techniques. The short-term sensitivity degradation of the detectors, which is caused by the plasma radiation itself, has been monitored and found to be severe. The results provided by the system are consistent with the measurements obtained with the usual plasma radiation diagnostics installed on TCV. Additionally, the coupling between core plasma radiation and plasma-wall interaction is revealed. This was impossible with other available diagnostics on TCV.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4848155