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Developments of Divertor Target‐Imbedded Langmuir Probes for W7‐X
Author(s) -
Ye M.Y.,
Laux M.,
Lindig S.,
Laube R.,
Greuner H.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201010140
Subject(s) - divertor , langmuir probe , plasma , stellarator , nuclear engineering , materials science , plasma diagnostics , thermal , pulse (music) , physics , atomic physics , electrical engineering , engineering , nuclear physics , voltage , tokamak , thermodynamics
The superconducting stellarator W7‐X equipped with a divertor is under construction at Max‐Planck institute for plasma Physics in Greifswald. It is planned to start plasma operation with the test divertor (TDU) without active cooling for shorter plasma pulse operation in 2014. The TDU has been designed to withstand thermal loads up to 8MW/m 2 for pulse operation of the W7‐X. A target‐imbedded array of electrostatic probes is a useful diagnostics to measure basic plasma parameters close to the divertor targets, and has been proposed to install into the TDU plates. Especially the design of imbedded probe arrays must be optimized not only to minimize thermo‐mechanical risk for the imbedding target but also to withstand thermal loads up to 8MW/m 2 during pulse operation. Finite element thermal analyses are performed to guide the design of the probe. Results and acceptable technical solutions for TDU target imbedded probe arrays are reported (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)