TJ-II:Fast camera: Difference between revisions

TJ-II:Fast camera (view source)

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 [[TJ-II]] disposes of different fast camera systems for plasma imaging
 <ref>[http://dx.doi.org/10.1088/0741-3335/48/12B/S44 J.A. Alonso et al, ''Impact of different confinement regimes on the two-dimensional structure of edge turbulence'', Plasma Phys. Control. Fusion '''48''' (2006) B465-B473]</ref>
-<ref>[http://dx.doi.org/10.1016/j.jnucmat.2009.01.140 D. Carralero et al, ''Turbulence studies by fast camera imaging experiments in the TJII stellarator'', Journal of Nuclear Materials '''390-391''' (2009) 457-460 begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting]</ref>
+<ref>[http://dx.doi.org/10.1016/j.jnucmat.2009.01.140 D. Carralero et al, ''Turbulence studies by fast camera imaging experiments in the TJII stellarator'', Journal of Nuclear Materials '''390-391''' (2009) 457-460 begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting begin_of_the_skype_highlighting              (2009) 457-460      end_of_the_skype_highlighting]</ref>
 <ref>[http://onlinelibrary.wiley.com/doi/10.1002/ctpp.201000039/pdf E. de la Cal et al, ''The visible intensified cameras for plasma imaging in the TJ-II stellarator'', Contrib. Plasma Phys. (2010)]</ref>.
 The main system is located in [[TJ-II:Sectors|sector]] B8, [[TJ-II:Ports|port]] B8TANG, viewing tangentially the [[TJ-II:Limiter|poloidal limiter]] in sector C3.
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 Here are some examples of movies recorded with the fast camera system of TJ-II.
+=== Limiter Recycling ===
+[[File:24119.gif|frame|center]]
+Non filtered, intensified,  54 kHz video. Exposure time: 9<math>\mu</math>s. I 650 V.
+ECH plasma with <ne>= 5x1018 m-3.  Recycling at limiter positioned on the LCFS.
+=== Helium Puffing ===
+[[File:24080.gif|frame|center]]
+Without filter and 75 mm lens. Speed: 100000 fps. Exposure time: 1s. V: 700 V.
+ECH plasma with <ne>= 5x1018 m-3.  Helium puffing through the limiter 35 mm outside LCFS.
 === Surface Interaction ===
+[[File:18152.gif|frame|center]]
+TJ-II plasma observed from a tangential port at 17.5 kHz sampling rate, with a lithium filter and image intensifier. In the field of view, the two most prominent areas of plasma-wall interaction can be seen:  the poloidal limiter (lower) and the harcore (helical limiter). As the plasma transits form ECH to NBI plasmas, the interaction level disminishes and becomes predominantly centered in the limiter.
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 === Dust ===
-[[File:polvo1b.gif|thumb|thumbtime=1]]
+[[File:polvo1b.gif|frame|center]]
-First insertion of the poloidal limiter after a lithiation of the vacuum vessel. The ejection of lithium flakes from the carbon surface can be seen clearly at the beggining of the discharge. At the end of the video, as the plasma becomes colder, the flakes penetrate deeper into it until they float freely in the post-discharge plasmoid.
+First insertion of the poloidal limiter after a lithiation of the vacuum vessel. Tangential observation, 15 kHz sampling rate. The ejection of lithium flakes from the carbon surface can be seen clearly at the beggining of the discharge. At the end of the video, as the plasma becomes colder, the flakes penetrate deeper into it until they float freely in the post-discharge plasmoid.
 == References ==
 <references />