Hi Nick. You write: >So yeah, with hand wound toroids >there is potential for leakage. I would guess that if >one could up the permeability of the torus material, >leakage would diminish - but do they make such a >ferrite? Fast yet furious; with low hysteresis, yet >the permeability of "moo" metal? Moo.
Sure, but no matter the ferrite you'll have substantial leakage flux. It's because the experiment seems to require you to saturate the core, at least from what I can see from the scope shots. Very little leakage would occur if the core weren't saturated. I would suggest to the ATG group that if they measure the force exerted on the rod, it would be practically nothing up to the point where the core begins to saturate, then it would increase rapidly. K.
