TJ-II:Fast ion loss probe: Difference between revisions

A mobile luminescent probe has been developed to detect fast ion losses and suprathermal ions escaping from the plasma of the [[TJ-II|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.

<ref>[http://link.aip.org/link/?RSINAK/79/093511/1 D. Jiménez-Rey et al, ''A flexible luminescent probe to monitor fast ion losses at the edge of the TJ-II stellarator'', Rev. Sci. Instrum. '''79''' (2008) 093511]</ref>