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TJ-II:Gas puff: Difference between revisions
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At [[TJ-II]], the working gas is puffed using a set of 8 piezoelectric valves, driven by a preprogrammed voltage signal. The aperture time and the desired density inside the vacuum vessel define the signal profile. This density depends in a complex way on the voltage applied to the valve and the accumulated effect of consecutive inlets during a shot. An VME waveform generator module generates the output signal. A graphical user interface has been developed based on JAVA; all system parameters can be fully configured using Internet applet viewers. | At [[TJ-II]], the working gas is puffed using a set of 8 piezoelectric valves, driven by a preprogrammed voltage signal. The aperture time and the desired density inside the [[TJ-II:Vacuum system|vacuum vessel]] define the signal profile. This density depends in a complex way on the voltage applied to the valve and the accumulated effect of consecutive inlets during a shot. An VME waveform generator module generates the output signal. A graphical user interface has been developed based on JAVA; all system parameters can be fully configured using Internet applet viewers. | ||
<ref>[http://dx.doi.org/10.1109/RTCON.1999.842611 L. Pacios et al, ''Gas inlet control system for the stellarator TJ-II'', Proc. 11<sup>th</sup> IEEE NPSS conf. (1999) 243 - 245]</ref> | <ref>[http://dx.doi.org/10.1109/RTCON.1999.842611 L. Pacios et al, ''Gas inlet control system for the stellarator TJ-II'', Proc. 11<sup>th</sup> IEEE NPSS conf. (1999) 243 - 245]</ref> | ||
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