Charged particle cannon
Charged particle cannons or simply particle-beam weapons fire a compressed stream of highly energized particles. The compression and heating converts the particles into plasma, which is fired through a magnetic nozzle as a beam. Usually, hydrogen atoms are the fuel source for a charged particle beam; but other materials are sometimes used, including noble gasses like Krypton and Argon.
Because of their complexity and high power requirements, charged particle weapons are fairly uncommon, and often confused with the much more powerful Anti-Proton or "AP Cannons".