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Article Ablation-Dominated Arcs in CO2 Atmosphere - Part I: Temperature Determination near Current Zero

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Figure

Figure 1. Setups (pressure built-up and vertical observation slits in the middle and (a) with a closed, long PTFE nozzle for experiments with strong ablation and highb) with two separated PTFE nozzlesforming a heating channel for plasma flow into a heating volume as used for the model circuit breaker.
Figure 2. Setup (b) with the model circuit breaker inside a pressure vessel with vessel windows andthe quartz plates in the observation slits
Figure 3. Left: Current and voltage waveform - nearly sine 50 Hz shape and duration ((grey) of window with ignition wire and example for observation of the general behavior of the∼10.6 ms).Middle: Pressure simulation for two positions and measurement for h
Figure 4. Visualization of the flow reversal before CZ for setup (b). Top: Selected frames of HSC(left channel) and of O I 777 nm (right channel) to visualize emission from PTFE and COimaging using double frame optics; filters were applied for the atomic line emissions of F I 675 nm2, respectively.Bottom: Plasma composition as obtained from CFD simulation.
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