Bussard Collector
The Bussard collector, also known as a Bussard ramscoop or ramscoop, is a device usually attached to the forward end of a warp Nacelle.
All Federation starships are equipped with Bussard collectors, which are positioned in the best line of sight to collect particles. Collection works best in regions where particle density is high like solar systems or nebulae.
The Bussard collector normally collects hydrogen, especially Deuterium for fuel replenishment but can be reconfigured to collect various gases like sirillium and plasma particles.
In 2374, Seven of Nine determined that the collectors of an Intrepid Class starship were less than optimal. She performed a series of modifications that enhanced them by twenty-three percent. (VOY: "Unforgettable")
A Bussard collector can also be reconfigured to expel gases or plasma. (TNG: "Samaritan Snare") Bussard collectors are not capable of producing nadion emissions. (VOY: "The Haunting of Deck Twelve") The Tosk variation of the Bussard collector was known as the arva node. (DS9: "Captive Pursuit")
In 2365, the USS Enterprise-D's collectors were used to create a harmless pyrotechnic display against the Pakleds to recover Lieutenant Geordi La Forge by igniting released hydrogen. This event came to be known as a crimson force field. (TNG: "Samaritan Snare")
In 2367, the Enterprise-D released large quantities of hydrogen from its Bussard collectors to create a violent explosion. (TNG: "Night Terrors")