Abstrtlct-The Crenoble High Magneiic Field Lriborrrinryis developing n 4 k T Hybrid Mugiief System io srtpporl resefireh irr sfeody, high nmgneticJelds. Oxford Instruments has bee!] selected tu supply the superconiiticlilrg orifsert system for !he hybrid mngtwl. The scope of siipply includes flie sirpercandtiding magnet, the Iiquejler, a 1.8 IC refrigemtor, ,Ire ttyasrrrt, the poww siipp& nnd the coiriroi-pmtectiolt ,rysietn. Tfic srrpercnnrlrrcfini: magne! is II 8-r, 1.8 m lotig nnd 1.1 m bore NBTi solenoid. It will be operaied in n 1.8 K superfluid keliim hnth (11 IilmospReric presstire. 111 order to deveiop the mngfiet, n speciflc R&Dprogr#m has been curried ofif. This pnper will rlescrihe the prirrclpn/ nsprcls vf the project iricluding the mnin results obfnined fo dflte.This paper describes the main features of the superconducting magnet system to be installed at the Grenoble High Magnetic Picld Laboratory (GHMFL) as part of thc 40 T new Hybrid Magnet. The GHMFL Hybrid Mngnet will produce o field of 40 T in a 34 inm bore; the superconducting magnet outsert itself will producc 8 T iii an 1100 m m cold bore while the 24 MW resistive insert will contribute 32 T. Oxford Instruments (0.1.) has been selected as supplier for the siiperconducting magnet system; thc scope of supply includes:Design and construclion ($the superconducting magnet, clyostuf and cryogenic system Refig~rudion-liy~e~er system 1500 A power supply with +/-I ppm sfabiliQ over 30 minutes Control andprotection sy.stemThe main requirements of the system are the following:Cupubilily of the magnet to with.Ttand a resistive inserf trip wilhout ylrmching, When a powcr failure occurs, the current in the resistivc insert decays with a 0.6 s time constant producing up to 3 T / s magnetic field variation on the outscrt. The fast field variation will produce at the same time current iiicrease and AC loss in the superconducting magnct. As a power 19R3 A.Nijliuis et al., 'I Coupling loss timc caiistaiits in iiill4zc Nb,Sn CIC modcl coltducton for fiision magnets ", ICMC '95 Procccdings M.Ohl ct al.,