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Couple of Questions about a DC electromagnet & cap

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THATguy:
I want to build a DC electromagnet (unsure if I will add ferrous core yet).
I'm basing it upon a microwave capacitor - see attached image.
I might make some custom wire that is water cooled, if there is too much heat.

However since I just charge up the cap, shut off the power & blam! the electromagnet gets a sudden blast of electricity from the cap. Since it is a very short blast of DC will I need to worry too much about heat/melting???

(I have some 10 gauge wire that I can test with)

ArthurDent:
You do not want to try this. Until you know what you're doing you stand a good chance of getting hurt or electrocuted.

Just leave the microwave and its high voltages alone.

THATguy:
I've already fully dismantled the microwave for scrapping.
I'm well aware of the dangers of capacitors, thanks for your concern.

I also know the dangers of a large magnetic force.

My current concern is of a melted electromagnet, do you have any useful info regarding my question?

ArthurDent:
The information I gave you was very useful and should be followed.

THATguy:
I've learned a lot from this video, & will be refining my design. Electromagnets have a much weaker range than I was expecting.
https://youtu.be/XM6CZIBMMg0

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