MEASURED FIELD PERFORMANCE OF CEBAF BEAM TRANSPORT MAGNETS

The 2200 magnets used in the CEBAF beam transport system have each und ergone testing of their magnetic fields. Results of these measurements will be reported. Integral Bdl profiles measurements (with a precisio n of almost-equal-to 10(-5)) for the 270 major solid-core dipoles used a multi-turn stretched wire with a reference magnet; the range of int egral Bdl for a given (1, 2, or 3m) dipole family was +/- 5 x 10(-4). The approximately 700 quadrupole magnets' integral B(n)dl (1 less-than -or-equal-to n less-than-or-equal-to 16, R = R(pole)) values were meas ured with an accuracy of 0.01% of the quadrupole field component using a multi-turn ''Halbach'' bucked coil for 20% of the magnets and a ref erence magnet for all. They had (integral B6dl)/(integral B2dl)<0.03% @ Rpole and (integral B10dl)/(integral B2dl) < 0.2% @ R(pole).