Proton Pack

The main weapon of choice to fight the supernatural.

History
Designed in 1984 by Egon Spengler and Ray Stantz in order to combat the ghosts that were plaguing New York City, The Proton Pack utilizes positively charged ions in order to harm and control the negatively charged ghosts. The Proton Stream itself is difficult to control and can cause great harm to people or property. The Ghostbusters themselves often get into trouble due to exorbitant property damage.

Use
To effectively use the Proton Packs a Ghostbuster must use the Proton Stream to sap the PKE (Psychokinetic energy) of a troublesome ghost. Once sufficiently weakened the Proton Stream switches to a capture stream where the ghost can now be manipulated by the Ghostbusters and directed towards the trap. The packs are nuclear powered particle accelerators mounted on backpacks with a Neutrino wand as the directing source of the Proton Stream.

Crossing the streams of multiple Proton Packs is highly dangerous, with Egon explaining that total protonic reversal as a probable outcome, causing all life as we know it to stop instantaneously and every molecule in a user's body to explode at the speed of light. The Ghostbusters have crossed the streams on a couple of occasions, notable their first encounter with the Sumerian deity Gozer.

Crossing the streams was later named the "Gozer Gambit" and is only attempted in the most dire of circumstances. Egon and Ray are constantly reworking and upgrading the Proton Packs to house different equipment and to function better, having come up with a variety of variants.