Why would your electron current have to match your ion current? You don't have to send any out, they just have be balanced by some combination of the Magrid and the ions already outside the Magrid. The charge doesn't care what the current is.If so, then you better be sending ions in and out with your electrons, or you will be violating Maxwell's equations somewhere
It was pointed out before this doesn't matter much if there's a lot of them stacked around each other. In any case I recall skepticism calculating the Debye length that way is even valid in a Polywell where there are dynamic currents.As a simple consequence of Coulomb's Law, coupled with an upper limit for the potential and a lower limit for the density, non-neutral structures in a polywell reactor can never be bigger than a few microns.
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Yes, the paucity of data is very frustrating, but how about some testable predictions for when we do get data, or using existing data (like Indrek did)? What ion current do you expect in WB-7/8? What's the lowest density that could produce macroscropic non-neutral structures? How does that compare with known experiments that have shown well formation?
I wouldn't be at all surprised if they run into showstoppers as they try to scale up, but I would be surprised if ions flowing into the wall is among them.