Antimatter is material composed of antiparticles, which have the same mass as particles of ordinary matter but have opposite charge and other particle properties such as lepton and baryon number.

Encounters between particles and antiparticles lead to the annihilation of both, giving rise to varying proportions of high-energy photons (gamma rays), neutrinos, and lower-mass particle–antiparticle pairs. Setting aside the mass of any product neutrinos, which represent released energy which generally continues to be unavailable, the end result of annihilation is a release of energy available to do work, proportional to the total matter and antimatter mass, in accord with the mass-energy equivalence equation.

There are no known naturally-occurring sources of antimatter in the natural environment.

Manufacture & Industrial Use

Antimatter is manufactured in small quantities for a number of high-tech processes, including the synthesis of Hyperlynium. It requires highly specialised and sophisticated containment and management systems.

In past centuries it was speculated that the matter-antimatter energetic reaction would be a usable power source.
However the great cost of such systems, especially when compared with simpler and cheaper conventional fusion energy generation, made them not only impracticable, but uneconomic.

The Antimatter Bomb

The technology exists to create, in theory, and anti-matter bomb which would have a very large energy output indeed.
However, the cost of each bomb - taking into account of the need for pre-mix containment and control, and the vast expense of synthesising large enough quantities of antimatter would be in the region of 50-100SV each.
To date nobody had ever needed one that badly.