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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Wiegers, S.A.J. Rook, J. den Ouden, A. Perenboom, J.A.A.J. Maan, J.C. |
| Copyright Year | 2002 |
| Abstract | The Nijmegen High Field Magnet Laboratory (Nijmegen HFML) presently offers to its users 33 T in two 32 mm bore resistive magnets, 32 T in a 50 mm bore resistive magnet and 30 T in a 50 mm bore hybrid magnet. To comply with the users' demand for ever higher magnetic fields without having to resort to hybrid magnets, a new resistive 20+ MW magnet has been designed and is now being constructed, which will deliver 38 T in a 32 mm bore. The magnet consists of five Florida-Bitter coils and one outer Bitter coil. The two innermost coils ( and , CuAg conductor) are electrically in parallel. The outer coil (E, Cu conductor) has an outer diameter set to 1 m. The length of this coil is about 670 mm and it weighs almost 3000 kg, indicative of the huge amount of conductor material needed for 40 T class resistive magnets. An important issue is the necessity to reduce the slit factor, i.e. the locally high current density in a winding at a slit in a Bitter disk. We therefore decided to implement the modified Weggel stacking scheme for the A, B and C coils, implying a noninteger number of disks per turn, e.g. 11 13/25 for the B coil. Also, a new compact (1.3 m outer diameter, 1.4 m height) housing has been designed, able to withstand the combined stress due to the maximum fault force of 2.1 MN (occurring when the C coil fails) and the effect of 40 bar differential water pressure. The new magnet is expected to be commissioned in the fourth quarter of 2012. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 4301504 |
| Ending Page | 4301504 |
| Page Count | 1 |
| File Size | 479905 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 22 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Coils Magnetomechanical effects Stress Conductors Cooling Magnetic separation Temperature resistive magnets High field magnets |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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