FIGUERA'S AETHER MAGNETIC FIELDS LINEAR PUMP, REVIVED

[kampen]

@ Citfka, dear Carroll,

Reply to message #488
Thank you for pointing this out.
This is a very important clarification, and I am glad you raised it.

You are absolutely right: although aluminum is non-ferrous, it is electrically conductive, and in the presence of a changing magnetic field it will support eddy (induction) currents.
Those currents can lead to localized heating, losses, and in some cases mechanical expansion, all of which are undesirable in this type of device.

In fact, your comment made me immediately re-evaluate my own setup, because I currently have aluminum washers placed between all the  secondary coils. Given the rapidly changing magnetic environment in that region, those Aluminuim washers could indeed be acting as shorted turns or partial flux dampers, reducing efficiency and possibly introducing thermal or stability issues.

This reinforces why using true non-conductive, non-ferrous materials (such as POM, nylon, fiberglass, or similar engineering plastics) is the safest approach for the inner supports, spacers, and clamp brackets located within active field regions.

I appreciate you sharing this warning, it is not always obvious to builders that non-ferrous does not automatically mean magnetically "invisible" in a dynamic field environment. This will certainly help others avoid the same potential mistake.

Greetings, Alex