The High Field Magnet Laboratory of the Radboud University is constructing a 45 T hybrid magnet system. The hybrid magnet is being assembled in one of the six cells of the Nijmegen laboratory. The resistive insert magnet will be energized with the 40 kA, 550 V power converter installed at the HFML.
This paper provides details of the electromagnetic and thermal coil design of the resistive insert magnet, which will be capable of generating at least 32.7 T in the background field of 12.3 T of the 625 mm bore superconducting outsert magnet. Details of the design of the housing will be discussed, in particular the clamping of the coils, necessary to hold the end turns of the coils and the way the housing deals with the fault forces that occur when one or more coils of the insert magnet would fail.