Negative Inductance and measure of Magnetic force.

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The COP of the attraction oscillator I described to truesearch would be a function of the relative permeability (Mu) of the coil core.

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You'll notice two SPDT spring pressure switches, one one each end of the ceramic piston:

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I filled this pale green plastic Tupperware tub with dark gray beach sand from in front of my apartment, and placed two ceramic block magnets under the lid to ballast my electromagnet. When I opened it I noticed the magnets were covered with black magnetic ferrite powder which washes down from the nearby rivers and piles up on the beach. The pure ferrite powder material I scrapped off the magnets is in a pile on the piece of white paper in the photo. This material has a very high relative permeability or Mu value. It's simple to cold mold it into a solid core simply be mixing it with a linear polyurethane composite epoxy. This is why special interest groups will never be able to monopolize the high perm core market:

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Here's how nicely the laminated steel "I" stator fits inside the washtub pump coil:

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The "E" core will not reverse magnetic polarity when I reverse the current polarity. It has potential but it's unsuitable for an attraction neutralization oscillator.
The "I' core tub coil does the job splendidly. My objective is to prove that the COP of the oscillator is in direct proportion to the core perm, and the "I" core and tub coil have tested out to be ideal. The "I" core coil projects a powerful "A" vector, unlike the "E" core. This is the platform I plan to continue forward with. I'll take inductance measurements when I return to testing soon.