MINOS far-detector coil design

The MINOS far detector will be installed a half mile underground in the Soudan mine in northern Minnesota. The 5.4-kt structure is assembled from 8-m wide, 1- inch thick octagonal steel planes. The planes are made from low carbon (1006), hot rolled steel and are toroidally magnetized. The 486 steel planes are arranged as two 'supermodules' of 243 planes each, separated by a 1.5-m long gap to allow space for installation of two separate magnet coils. Each plane is hung by two 'ears', which are extensions of the octagonal plane structure, similar to the hanging files in a file drawer. The steel planes have a center-to-center spacing of 5.94 cm. This document has been prepared for the 8/99 Conceptual Design Review of the MINOS Far Detector Coils. Its main goal is to provide a set of references to previous documents and to assemble various design drawings and engineering calculations that have not been included in previous technical memos. It also provides some background material relevant for the coil implementation. Much of the text for this document is edited from the MINOS Detectors Technical Design Report