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  Thermographic observation of the divertor target plates in the stellarators W7-AS and W7-X

Hildebrandt, D., Gadelmeier, F., Grigull, P., McCormick, K., Naujoks, D., Sünder, D., et al. (2003). Thermographic observation of the divertor target plates in the stellarators W7-AS and W7-X. Journal of Nuclear Materials, 313-316, 738-742. doi:10.1016/S0022-3115(02)01490-3.

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 Creators:
Hildebrandt, D.1, Author           
Gadelmeier, F.2, Author           
Grigull, P.3, Author           
McCormick, K.4, 5, Author           
Naujoks, D.1, Author           
Sünder, D.1, 6, Author           
W7-AS Team7, Author
Affiliations:
1Plasma Diagnostics Group (HUB), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856324              
2External Organizations, ou_persistent22              
3W7-X: Physics (PH), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856305              
4Stellarator Scenario Development (E5), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856285              
5W7-AS, Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856310              
6Experimental Plasma Physics 3 (E3), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856291              
7Max Planck Institute for Plasma Physics, Max Planck Society, Boltzmannstraße 2, D-85748 Garching, DE, ou_1856284              

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Free keywords: 15th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI 15), Gifu, 2002-05-26 to 2002-05-31
 Abstract: Thermography is applied on the stellarator W7-AS to monitor the thermal load of the recently installed divertor targets. A three dimensional numerical code was developed to evaluate power fluxes arriving at the targets from the measured temporal evolution of the surface temperature distribution. Values of the thermal conductivity of the used CFC-target material for all three directions are required for this evaluation and determined by observing the propagation of controlled heat pulses applied by an infrared laser. The evaluation of the thermographic measurements during plasma operation shows characteristic spatial and temporal features of the arrived heat fluxes. Significant features in high density regimes like plasma detachment from the divertor target plates or strongly enhanced localised plasma radiation (MARFE) has been observed by the installed infrared cameras. The implications of these observations for the thermographic system for W7-X are shortly addressed.

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Language(s): eng - English
 Dates: 2003
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Journal of Nuclear Materials
  Alternative Title : J. Nucl. Mater.
Source Genre: Journal
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Publ. Info: Copyright © 2003 Elsevier Science B.V. All rights reserved
Pages: - Volume / Issue: 313-316 Sequence Number: - Start / End Page: 738 - 742 Identifier: -