Proton Accelerator Gun

The Proton Accelerator Gun was a superweapon designed during the Terran-Kilrathi War. Initially developed by the Kilrathi Empire and later adapted for use on vessels from the Terran Confederation, it was a massive cannon with the capability of destroying entire enemy targets of high strategic value. Depending on the variant and the user, it could destroy heavy warships or even entire planets.

In 2654, the Kilrathi tested their prototype Proton Accelerator Gun (aka Graviton Weapon) on Warhammer XII. The weapon fires a special explosive burst (which appears similar to a Particle Cannon blast) at a target, and the explosion is followed by a 137 fold increase in gravity, which completely eliminates a target. The weapon went on to form the centerline armament of the Kilrathi Sivar dreadnaught, and was field-tested with the complete destruction of Goddard Colony. The Kilrathi weapon had a single operational drawback: it took several minutes to lock and fire -- it could not effectively be used against capital ships.

The Graviton Weapon proved to be highly-effective in its usage at Goddard: All 250,000 Terran citizens and all other lifeforms inhabiting the planet were killed, and every settlement on the surface was reduced to utter ruin. However, it put a major power drain on the Sivar, forcing it and its strike force to retreat to Kilrathi space so that it may be reloaded and refueled. The Sivar and its signature Graviton Weapon were eventually destroyed by pilots of the TCS Tiger's Claw during a covert operation to destroy the superweapon, and the technology was lost to the Kilrathi.

However, the wreckage of the Graviton Weapon was extensively studied by the Terrans, and by the 2660s was redesigned as the Proton Accelerator Gun, as the Terrans referred to it. Unlike the Kilrathi version which was limited to the destruction of planets, the Terran version was instead revised as an anti-ship platform, and it became the centerpiece of the iconic Confederation-Class Dreadnoughts. Its only drawback was its drainage on the reactor of said dreadnoughts, and if fired more than once within a short timeframe could trigger a catastrophic overload of the vessel's power plant, forcing the Terrans to limit its usage in a single engagement. However, it proved to be a valuable weapon, and was capable of annihilating virtually any Kilrathi warship with a single blast.

The Proton Accelerator Gun served its Terran users well, but saw less usage as more Confederation-Class vessels were lost in combat and after the War's end was rarely seen in combat.