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Assassination of Ramius

A force field surrounding a Kull warrior.

"They work one way. They keep things in, not out."
Major Samantha Carter[src]

Tok'ra force fields, also referred to as shields, are energy barriers, unique in that they are one-way in nature, allowing matter to enter the shield in one direction, but not the other.

Several variants of the shield appear to exist. In one variant, an enclosure is formed around an area in the shape of a cube. When this variant is activated, it appears initially as a thin beam emitted from a single point and extending vertically up to a maximum height. This vertical beam then moves in a straight line until a square is fully traced out. (SG1: "Evolution, Part 1") Another variant takes the form of a flat wall projected by a series of emitters. (SG1: "Prototype")

These force fields are often used in traps; in 2003, a Tok'ra force field was used in an attempt capture and incapacitate a Kull warrior. However, due to the nature of the Kull's armor, it was able to penetrate the shield with relative ease. (SG1: "Evolution, Part 1")

Additionally, these force fields have been used to detain individuals, being placed at the doorway of a room to prevent an individual from leaving. In 2005, a Tok'ra force field was used to detain Khalek, though he too was able to penetrate it using abilities gained through the ascension process. (SG1: "Prototype")

Notes[]

Tok'ra force fields are often utilized for their ability to allow matter to pass through in only one direction, and are described as being unique in that regard; They are often used in situations to allow weapon fire to hit a target that is being contained within the force field. However, the shields of spaceships act in a similar fashion, allowing a ship engaged in combat to fire weapons though one side of the shield while simultaneously repelling incoming fire. Thus, the exact nature of the Tok'ra force field's uniqueness is unknown. As they are only ever seen being used in a limited capacity to enclose a single individual, it is possible that Tok'ra force fields are one of the only small-scale shield system capable of one-way operation.

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Force fields
Ancient force field · Bedrosian force field · Goa'uld force field · Latonan force field · Malakai's force field · Ori force field · Tok'ra force field · Tollan force field · Traveler force field · Vanir force field · Wraith force field
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Tok'ra
Tok'ra AcastusAdrastosAldwinAniseAntocCordeshDelekEgeriaGarshaw of BeloteJa'nokJalenJalrowJaydinJolinar of MalkshurKananKelmaaKhonsuKorraKurserLantashMalekMapepMarteenMingalaMarnonOckerOneshPer'susPoloniusRen'alSelmakSholredSinaTa'SeemThellasThoranTok'ra ElderToliiZanufZarinZelida
Tok'ra hosts Jacob CarterSamantha CarterCharlieEilaanKevin ElliotFirnanFreyaKadonLiandraMartoufNyklosJack O'NeillBenjamin J. ReillyPriaRoshaSalemSarooshShevakSuloMacAlester St. JohnTroy StantonThinaTulennWey'larYosuf
Tok'ra outposts MeliaParvaP34-353JGhanazVorashRevannaTok'ra homeworld
Tok'ra technology Bio-sensorDisplay deviceGoa'uld BaneHologram projectorHoming beaconHUD headsetKull disruptorMemory recall deviceRadioactive Tok'ra isotopeReol chemicalRing remoteShock grenadeShort range communicatorStrength gaugeSymbiote extractorSymbiote poisonTacluchnatagamuntoronTok'ra control consoleTok'ra data crystalTok'ra force fieldTok'ra moon destabilizerTok'ra star mapping technologyTok'ra stasis podTok'ra subspace receiverTok'ra tabletTok'ra tunnelTransphase Eradication RodZa'tarc detectorZa'tarc ringZat'nik'tel
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