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TJ-II:Fast camera: Difference between revisions
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* 5000 fps with 1024 x 1024 pixels(full frame) | * 5000 fps with 1024 x 1024 pixels(full frame) | ||
* 10000 fps with 512 x 512 pixels | * 10000 fps with 512 x 512 pixels | ||
* 200000 fps (maximum ever employed so far) with | * 200000 fps (maximum ever employed so far) with 182 x 80 pixels | ||
The dynamic range of the sensor is 8 bits, and the memory size is 8 GB. | The dynamic range of the sensor is 8 bits, and the memory size is 8 GB. | ||
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[[media:24119.gif|Limiter recycling movie]] | [[media:24119.gif|Limiter recycling movie]] | ||
Without filter and 75 mm lens. Speed: 54000 fps. Exposure time: 9 | Without filter and 75 mm lens. Speed: 54000 fps. Exposure time: 9μs. V: 650 V. | ||
ECH plasma with < | ECH plasma with <n<sub>e</sub>> = 5x10<sup>18</sup> m<sup>-3</sup>. Recycling at limiter positioned on the LCFS. | ||
=== Helium Puffing === | === Helium Puffing === | ||
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[[media:24080.gif|Helium puffing movie]] | [[media:24080.gif|Helium puffing movie]] | ||
Without filter and 75 mm lens. Speed: 100000 fps. Exposure time: 1 | Without filter and 75 mm lens. Speed: 100000 fps. Exposure time: 1μs. V: 700 V. | ||
ECH plasma with < | ECH plasma with <n<sub>e</sub>> = 5x10<sup>18</sup> m<sup>-3</sup>. Helium puffing through the limiter 35 mm outside LCFS. | ||
=== Surface Interaction === | === Surface Interaction === | ||
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[[media:18152.gif|Surface interaction movie]] | [[media:18152.gif|Surface interaction movie]] | ||
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 | 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 hardcore (helical limiter). As the plasma transits form ECH to NBI plasmas, the interaction level diminishes and becomes predominantly centered in the limiter. | ||
=== Dust === | === Dust === | ||
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[[media:polvo1b.gif|Dust movie]] | [[media:polvo1b.gif|Dust movie]] | ||
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 | 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 beginning 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 == | ||
<references /> | <references /> | ||