Why aren't coil guns made this way?

In a physics demo, my teacher used a small coilgun,  but it used low voltage AC, not a single high voltage burst, also it used an aluminum ring on the outside of the coil instead of a slug on inside of it. Apparently the AC creates a changing magnetic field, which induces current in the ring giving it a magnetic field as well...

kelseymh7 years ago
Since your professor had one, clearly some coil guns are made that way (with a central core and launched ring/tube).  There are multiple solutions to the same problem, depending on the application.