You have a machine that’s basically a clean room inside and one of the parts is essentially electrosputtering tin but then throwing all the tin away and using the EM pulse from the sputter to do work.
Oh and can you build it so it can run hundreds or thousands of hours before being cleaned? Thanks byyyyyyyyeeeeee!
The inside of those machines are far, far cleaner than the inside of any clean room ever entered by a human. They have to be molecularly clean.
Which isn't easy considering they explode tin droplets in the machine. I think that's the point the other commenter wanted to make.
Think about the purity requirements that places on the tin.