Antiproton beam

Subatomic partical of Anti-Matter resembaling a Proton except it has an opposite spin and electric charge. Instead of having a protons positive charge anti-protons have a negative charge. The Planet killer used this in a beam to break down matter. "The Doomsday Machine"(TOS) An Anti-Proton beam could also find a cloked Romulan ship,and increase a starships shields by a factor of 10."Defiant"(DS9),"Q and the Grey"(VGR).