RESISTIVE MAGNETS Maintenance, Upgrades

Jim O’Reilly: RES/MAG Maintenance POWERED: Magnet Cells J. Chen, Jim O’Reilly, J. Toth, S.T.Bole, S. Gundlach, Chris Ray, Nicole Walsh Chris Ray Nicole Walsh 7 Resistive Magnets & 1 Hybrid presently. 4 Upgrades, 1 Series-Connected Hybrid and a Split are planned. Cell 2    SPLIT 2010 Cell 4 195mm  19.5 T Cell 6 52mm  25T 12ppm Cell 8 35T 36T ~2010 Cell 10    Cell 12 33T 2009 Cell 14 36T SCH 2012 Cell 16 Cell 1 Cell 3 Cell 5 50mm  31T 32 T Cell 7  28T 50ppm Cell 9 50 mm 31T 32T ~2011 Cell 11 Cell 13  Test Stand I Test Stand II Cell 15 Hybrid 45T 3 PS Maintenance past year 11 coils stacked, 6 coils installed. Complete set of spare coils on-hand.! Magnet bores are 32 mm unless noted otherwise.

Resistive Magnet Solenoids Worldwide Black = Tallahassee Red = Nijmegen Blue = Grenoble = 3 cm bore = 5 cm bore

Upgrades Planned for Grenoble and Nijmegen Grenoble: using 24 MW expect to attain higher field than our 20 MW magnets. Nijmegen: By building 800 mm OD magnets expect to attain higher field than our 600 mm OD magnets

Proposed NHMFL Upgrades 28 MW New Magnet 28 MW New Magnet Short-Term: Improved stacking pattern using existing disks and housings will keep us competitive. Long -Term: Utilizing available power, building larger housings and new magnets will keep us ahead of the competition. Need Funding

Total field increases from 35T to 36T. 32 mm Bore Magnet Upgrade A1 A2 Existing Planned Disks/turn 6 5.54 7 6.53 Current Density (A/mm2) 714 770 412 440 Power Density (W/mm3) 14 16.5 4.59 5.25 Stress (MPa) 668 647 642 621 Field Contribution (T) 10.0 10.7 10.1 Total field increases from 35T to 36T. More complicated stating pattern attains fractional disks per turn and higher efficiency magnets. This approach has already been employed in the 45 T hybrid insert. 32-mm and 50-mm magnets will be upgraded by ~1 T in coming years as the existing magnet wear out. This will enable us to keep up with other labs at minimal cost.

Total field increases from 31T to 32T. 50 mm Bore Magnet Upgrade A1 A2 Existing Planned Disks/turn 6 4.62 8 6.59 Current Density (A/mm2) 534 592 402 423 Power Density (W/mm3) 7.73 9.49 4.27 4.72 Stress (MPa) 623 635 648 646 Field Contribution (T) 7.1 7.8 9.1 10 Total field increases from 31T to 32T.

28 MW New Magnet Concept 400mm 575mm 600mm OD 1000mm OD 20MW – 35T Requires Funding

Summary MagLab resistive magnets unmatched worldwide! Competition Is Gaining! (24 MW vs 20 MW) Short Term Plan – More efficient stacking using existing disks, housings, etc. to stay competitive Long Term Proposal – New housings and disks @ 28 MW to stay ahead.