I've built a Tesla coil that stands about 3 ft tall and uses a spark gap as the interrupter for the primary circuit. Judging by the size of the streamers it's reaching at least a million volts.
Someone once told me that you have to be careful with Tesla coils because they can create x-rays. I had been skeptical, but then read about how x-rays can be produced by unwinding scotch tape. So now I am somewhat concerned.
So are harmful x-rays a risk with Tesla Coil operation, and if so how can I easily test my system to see if it's safe?