^^^I believe that's actually spelled cannon
Making high voltage generators for producing ions isn't difficult, but can be expensive and dangerous. It may also require any of several other devices or means to achieve your intended aim.
Pyro arc devices are fun to make, and you only need a CRT television that has nothing functionally wrong except that the tube is dead. --And someone who 1) knows whut tha flock they're doin', and 2) likes to light things on fire.