Page "Collider Detector at Fermilab" Paragraph 25
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Outside of the silicon detector, the central outer tracker works in much the manner as the silicon detector as it is also used to track the paths of charged particles and is also located within a magnetic field.
Sense wires are thinner and attract the electrons that are released by the argon gas as it is ionized.
The field wires are thicker than the sense wires and attract the positive ions formed from the release of electrons.
Although the COT is not nearly as precise as the silicon detector, the COT has a hit position resolution of 140μm and a momentum resolution of 0. 0015 ( GeV / c )< sup >− 1 </ sup >.
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