A flexible luminescent probe to monitor fast ion losses at the edge of the TJ-II stellarator
- Laboratorio Nacional de Fusion, Asociacion Euratom-CIEMAT, Avda. Complutense 22, E-28040 Madrid (Spain)
- Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Boltzmannstr. 2, Garching D-85748 (Germany)
- Instituto de Matematicas y Fisica Fundamental, Consejo Superior de Investigaciones Cientificas, Serrano 113-bis, 28006 Madrid (Spain)
- Laboratorio de Metrologia de Radiaciones Ionizantes, CIEMAT, Avda. Complutense 22, E-28040 Madrid (Spain)
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.
- OSTI ID:
- 21266430
- Journal Information:
- Review of Scientific Instruments, Vol. 79, Issue 9; Other Information: DOI: 10.1063/1.2979013; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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