OT - Physics Question on Anti-Matter

[Tnargversion2]

Ok, so in the game perspective, some of the components that utilize Anti-Matter Warheads, we're probably talking about very finite amounts of AM, say less than a gram of the stuff? Other wise we would see one hit one kill damage types correct?

If an ounce of AM and an ounce of matter can produce and energy release something like 10 times that of the most powerful nuke or hydrogen bomb ever produced and we were to successefully hit say an aircraft carrier sized vessel, it would be a safe bet that the aircraft carrier would be nothing but ashes, maybe some mangled trushes and support beams here and there, on one hit.

Next question, how large of a device and energy requirement would it take to contain a gram or less of AM. Hypothetical guesses again are welcome, just trying to visualize this in my head.