Superconducting toroidal magnet design for the G0 experiment at TJNAF

An eight coil superconducting toroidal magnetic spectrometer has been designed for the G0 experiment to be performed at Thomas Jefferson National Accelerator Facility (TJNAF). The toroid is designed so that the particle trajectories pass through the magnet insulating vacuum. The magnet is made of aluminum structural components with a copper stabilized indirectly cooled conductor. The toroid is 2 meters long, 4 meters outside diameter and is oriented with its major axis horizontal. This orientation allows its use as an eight fold symmetric focusing spectrometer. The SC magnet has a stored energy of 6.5 Mjoules. The design and analysis of this device are presented. The plans and status of magnet system procurement are presented.