THE PHENIX DETECTOR MAGNET SUBSYSTEM

The PHENIX [Photon Electron New Heavy Ion Experiment] Detector is one of two large detectors presently under construction for RHIC (Relativi stic Heavy Ion Collider) located at Brookhaven National Laboratory. It s primary goal is to detect a new phase of matter; the quark-gluon pla sma. In order to achieve this objective, the PHENIX Detector utilizes a complex magnet subsystem which is comprised of two large magnets ide ntified as the Central Magnet (CM) and the Muon Magnet (MM). Muon Iden tifier steel is also included as part of this package. The entire magn et subsystem stands over 10 meters tall and weighs in excess of 1900 t ons (see Fig. 1). Magnet size alone provided many technical challenges throughout the design and fabrication of the project. In addition, in teraction with foreign collaborators provided the authors with new are as to address and problems to solve, Russian collaborators would fabri cate a large fraction of the steel required and Japanese collaborators would supply the first coil, This paper will describe the overall des ign of the PHENIX magnet subsystem and discuss its present fabrication status.