Rich Feldman wrote:Let's be sure we have the same understanding of "Plasma Backdraft Arrester".
Left side tube connects to apparatus (ion gun?) at high voltage and very low pressure.
You don't want an electric discharge inside the hose, back to a gas flow control at ground potential.
HV isolation comes from the oil column in U-tube, right?
Gas pressure on the source side of U-tube will be on the order of a couple of torr, to support the oil level mismatch. Gas bubbles will expand as they rise through the gradient of hydrostatic pressure.
Don't know how much much they will expand, since surface tension will also be important.
How soon will you have a picture for us?
Sparse bubbles probably won't reduce the dielectric breakdown voltage much. Were you ever told that it's dangerous to pee off the side of a bridge, if there are electric train wires not far below?
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