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Oh, that's cool. I have no idea about physics on that level, but I love this kind of stuff for its sheer usefulness in researching reality.
I didn't either before ~15 months ago, but as with most research topics, when you're in a lab you're surrounded by experts (i.e. my adviser built one of these for his PhD) and learn about how they work pretty quickly. If you have a high-school-level of physics, you can pick up on things like "magnetic fields move charged molecules" even if you don't know the physics-PhD-level equations to describe those movements or the MechE-PhD-level skills to machine one yourself.