Design of an ultra high vacuum compatible copper septum magnet

An Ultra High Vacuum compatible thin copper septum magnet has been developed at Brookhaven National Laboratory. The solid core, single turn magnet is pulsed at 1500 amps and has a field of 0.6 KG. The 0.76 mm thick copper septum is water-cooled and is designed to run at a maximum power of 2 KW. A remote positioning system is used to optimize the septum position during various extracted beams. The cross section of the septum magnet was modeled and 2-dimensional magnetic field calculations were performed to compute the magnetic field uniformity in the main field region and in the field strength in the fringe field region. The calculated field uniformity as well as comparison of the calculated fields in the fringe field region with the measured fields in the same region will be presented. The design and construction techniques used to fabricate this magnet will also be described.