There's a lot of talk about the discover of a Persistent Current -->
http://www.sciencedaily.com/releases/2009/10/091011071349.htm
WikiPedia on SQUIDs: "They are sensitive enough to measure fields as low as 5 aT (5e−18 T)"
I just did a FEMM calculation on this persistent current loop. According to the science article, the current loop is ~ 300 nm in diameter. The article does not mention the current, but what caught my interest is that it might be the mysterious 10 pA of current, which pops its head in all of my diode & piezo experiments, and now possibly the HV experiment. Anyhow, FEMM provides very accurate answers, and it says the magnetic field would be 1.6e-19 T at a distance of 100 um away from the current loop.
The article says, "They used extremely sensitive magnetometers known as superconducting quantum interference devices, or SQUIDs, but the results were inconsistent and even contradictory."
Ah ha, is this persistent current the mysterious 10 pA? :-D
Created on 2009-10-12 22:24:29 by EnergyMover
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