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research
A flexible luminescent probe to monitor fast ion losses at the edge of the TJ-II stellarator
Authors
A. Baciero
A. Fernández-Camacho
+8 more
J.M. Fontdecaba
Gustavo García
M. García-Muñoz
J. Guasp
D. Jiménez-Rey
M. Liniers
L. Rodríguez-Barquero
B. Zurro
Publication date
1 January 2008
Publisher
'AIP Publishing'
Doi
Cite
Abstract
9 pags. ; 16 figs.A mobile luminescent probe has been developed to detect fast ion losses and suprathermal ions escaping from the plasma of the TJ-II stellarator device. The priorities for its design have been flexibility for probe positioning, ease of maintenance, and detector sensitivity. It employs a coherent fiber bundle to relay, to the outside of the vacuum chamber, ionoluminescence images produced by the ions that impinge, after entering the detector head through a pinhole aperture, onto a screen of luminescent material. Ionoluminescence light detection is accomplished by a charge-coupled device camera and by a photomultiplier, both of which are optically coupled to the in-vacuum fiber bundle head by means of a standard optical setup. A detailed description of the detector, and the first results obtained when operated close to the plasma edge, are reported. © 2008 American Institute of Physics.This work was partially funded by the Spanish Ministry of Science and Education under Project Nos. FTN 2003-0905 and ENE2007-65007.Peer reviewe
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