Printed board dipole trim magnet design for a 20 MeV LIA

The printed board dipole trim magnet design for a 20Me V LIA is presented. The prototype dipole magnet with the sin/cos distributed windings has demonstrated more than 650 Gs-cm integrated dipole field and 1% integrated dipde field homogeneity within 5 cm in radius, which is about 40% of the magnet radius. Numerical modeling of two prototype magnet designs using the 3D magnetic field code SCMAO is presented as well as data from magnetic field measurements of the two magnets. The agreement between the calculations and measurements is accurate to 2–3%.