TJ-II:Fast camera: Difference between revisions

TJ-II:Fast camera (view source)

291 bytes removed , 22 April 2015

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 === The Visible Intensified Fast Camera with Wide-angle view of JET ILW experiment<ref name="delaCal5"> </ref>===
-[[File:25623wComm_Photo000001.jpg|700px|link=http://www-fusion.ciemat.es/camaras/25623wComm.avi|Limiter recycling movie]]
+[[File:25623wComm_Photo000001.jpg|700px|link=http://www-fusion.ciemat.es/camaras/JETselection.mp4]]
-An intensified visible camera looks tangentially at a poloidal limiter where helium recycles, acting as a wide neutral source, and the atomic line emission due to plasma excitation becomes strongly localized there. It includes a bifurcated coherent bundle, each end with a different interference filter to select helium atomic lines, so that two simultaneous filtered images are captured in one single frame. The object of the proposed technique is to apply the well-known helium-beam line-ratio technique to obtain from selected filtered images the two-dimensional (2D) edge plasma n<sub>e</sub> and T<sub>e</sub>.
+The JET wide-angle view Fast Camera has been upgraded with an image intensifier for light amplification and a filter wheel. The objective was to track fast events down to the microsecond range without filtering and to image atomic emission at a speed so as to resolve Edge Localised Modes (ELM), disruptions, pellet injection or plasma breakdown.