SYSTEM SIGN CONVENTION: The sign convention for the Booster Corrector (BC) Magnet and BPM Assembly was chosen so that measured positions delivered by the data acquisition system to Acnet will be signed positively for beam positions radially outside at horizontal locations and above center at vertical locations. POSITIVE measurement values correspond to beam UP or OUT. NEGATIVE measurement values correspond to beam DOWN or IN. This convention is generally true of all the accelerator rings. However note that the personnel aisle is on the OUTSIDE of the beam line in the booster tunnel. For pictures of BC magnet and BPM assembly showing sign conventions refer to the included Document titled ?Booster Corrector BPM Coordinates?
H trim +I +By +X,Bend proton outward
V trim +I -Bx +Y,Bend proton upward