Construction of the ITER magnet systems has been started at the end of 2007 following the signature of the first procurement arrangements (PA) for the toroidal field (TF) conductors. Six ITER members are involved in the share of the ITER magnet components and, to date, eighteen PA between the ITER Organization and six domestic agencies have been signed. Substantial progress towards full-scale construction has been achieved with the placement of the first large manufacturing contracts, the production of several tens of tons of advanced Nb 3 Sn and NbTi strand, and the setup of large cabling and jacketing facilities. The detailed design of the coils and support structures has also been finalized. The qualification of the fabrication processes for the TF coils and poloidal field (PF) coils has been initiated. The detailed design of the central solenoid (CS) coils is being developed. The design of the correction coils (CCs) with their support structures has been finalized, as well as for the TF gravity supports and clamps of the PF coils. The manufacture of prototypes of the feeder lines and current leads has been started, while ITER is in charge of the procurement of the required magnet instrumentation. This paper provides a progress report on the ITER magnet construction as per December 2010.
The National High Magnetic Field Laboratory (NHMFL) has embarked on an innovative program to develop a number of Series-Connected-Hybrid magnetic systems. In this novel concept, a set of resistive coils (insert) and a set of superconducting cable-in-conduit conductor (CICC) coils (outsert) are electrically driven in series, rather than independently as in previous hybrid systems. Presently NHMFL is working on 3 different projects. The first, funded by the National Science Foundation (NSF) with an $11.7 million grant, is related to the construction of a cylindrical-bore Series-Connected Hybrid (SCH), for high field nuclear magnetic resonance (NMR), condensed matter physics, biology and chemistry, to be located at the Magnet Lab's Tallahassee location. The second, funded by the Hahn-Meitner Institute (HMI) in Berlin, relates to the engineering design for a horizontal bore Series-Connected Hybrid to be used in a neutron diffraction experimental system. Finally, the third, also funded by NSF, is a conceptual and engineering study for an SCH that would be used for neutron scattering experiments at Oak Ridge National Laboratory's Spallation Neutron Source (SNS), similar to the HMI version. Because of the main points in common between the 3 different systems, our final goal is to develop a superconducting magnetic system suitable for the 3 applications. We believe this is possible for the magnet although, due to the different field/bore orientations, some differences in the mechanical design of the cryostat and resistive inserts will exist. In this paper we will give an overview of the R&D strategy devised to develop these superconducting magnetic systems, together with a report on the present status of such program.
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.,
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