RHIC insertion magnets

The Relativistic Heavy Ion Collider (RHIC) under construction at Brookhaven National Laboratory (BNL) has six interaction regions for the colliding beam. Each interaction region is part of an insertion region consisting of several magnets. The required aperture of some of the quadrupoles and dipoles in the insertion regions is much larger than the nominal 80 mm aperture of the other magnets in the accelerator. There will be 82 quadrupole magnets having an aperture of 130 mm and a maximum operating field gradient of 59 T/m and 12 dipole magnets having an aperture of 200 mm and an operating central field of 4.3 tesla. In this paper the authors discuss the magnetic design of the coil and iron cross section for these magnets. The first part will describe the quadrupoles and the second part the dipoles