Multi-layer magnet with seperate coils

I am trying to make a very strong magnet that will only last for a short pulse, just a fraction of a second, with a high peak current.

I am going to use 1mm (18awg) wire, so the resistance should be pretty low, but with even just 25m, it would be expected to have 0.5Ω. I would like to have many turns of wire to make the magnet stronger, and I will be using 60V, so resistance could drastically affect the peak current.

Because I don't want an overly long coil, between 5-10cm, and a fairly small internal radius < 2cm, I will need multiple layers of wire. As long as I wind them in the same direction (clockwise or anti-clockwise) they shouldn't negate other layers' magnetic fields.

So what would happen if I were to have the same amount of layers, say 10 layers, and I connected half of them to a power source, and the other half to another identical power source? Would this then half the resistance, while still having the coils creating magnetic fields that would add together?

Would it create a magnetic field of twice the strength, due to a doubling of current, because of a halving of resistance (assuming the power source has negligible resistance)?

Also, how would it affect the inductance of the circuit(s)?