A 17-tesla magnet with multiple radial access ports

A description is given of the design and construction of a magnet generating over 17 T with multiple radial access ports to allow water cooling. There are seven ports, 19-mm high, at 30 degrees intervals around half the circumference of the magnet midplane. The magnet consists of a split pair of coils of 330 mm (outer diameter) and 100-mm length spaced 23 mm apart. Together they consume approximately 8.5 MW. They are Bitter coils with cooling provided by water flowing outward through shallow passages etched in the plates. Heat fluxes are as high as 700 W/cm/sup 2/. In an unusual overall configuration, hydraulics, coil clamping, support, and electrical connections were all made as unobtrusive as possible. >