Actually i meant this one.. Stan made many designs...
I think the magnetized particles will have a kind of monopole...only north for example so stan could get them repealed by a similar polarity, so he could make a closed loop where the particles are moved by HHo generated flow and the hho can be collected while the magnetized gas remain in the epg this also need a pump cause otherwise the particles would not want to go in that direction, it would go on the direction of least energy.. This would be the electrical gas generator..
The epg uses magnetized gas, it only require the right dc arc temperature to make, a vacuum pump, argon gas, iron(B+) and a magnet..... So tubes should handle the vacuum... maybe not... maybe you can just keep flowing the new gas into it and close it after a while to assure you have mostly this gas inside the closed tube...
The tubes should be non magnetic and bad conductors or they will represent a shorted turn... witch leads me to think would be better to use ss 304 material...
you need to consider how many particles are getting vaporized to calculate the flow rate of argon into the spark gap... there is an optimum ratio.
If the thing is really copper, maybe the shorted turn could have a meaning... but actually i believe it does not... I think it could be 304 coated with enamel that resembles copper coated, cause of the enamel color...