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Magnet Science & Technology: Future directions

Magnet Science & Technology: Future directions. Presentation to the Users Committee November 12-13, 2004 J.R. Miller. MS&T Directions. MS&T Composition. Administrative & logistics, 5 Technical support, 10 Technical professionals, 7 Senior scientists/managers, 13 Affiliated faculty, 4

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Magnet Science & Technology: Future directions

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  1. Magnet Science & Technology:Future directions Presentation to the Users Committee November 12-13, 2004 J.R. Miller

  2. MS&T Directions Miller, Users' Com. Mtg.

  3. MS&T Composition • Administrative & logistics, 5 • Technical support, 10 • Technical professionals, 7 • Senior scientists/managers, 13 • Affiliated faculty, 4 • Affiliated postdocs, 7 • Affiliated grad. students, 21 • Affiliated undergrad. students, 11 Totals: 37 Core (incl. Dir. & Asst. Dir.) + 43 Affiliates (incl. part-time) Miller, Users' Com. Mtg.

  4. Functional-Group Leaders C. Luongo, Educational Mission M. Bird, Analysis K. Han, Materials Development/ Characterization S. Bole, Engineering/Design E. Marks, Fabrication/Assembly J. Miller, Components/Systems Development & Test Y. Jensen, Administration/Logistics Project/Program Leaders M. Bird, Resistive Magnets C. Swenson, Pulsed Magnets I. Dixon, 900MHz Commissioning J. Miller, Hybrid Rebuild/Hybrid HTS Leads/Series-Connected Hybrid R. Walsh, 60T/100T Materials Testing D. Markiewicz, VHF Solenoid Proposals J. Schwartz, HTS Technology Development MS&T Organization J. Miller, Director T. Painter, Asst. Director Miller, Users' Com. Mtg.

  5. Functional Groups • Repositories of capabilities • Staff • Equipment • Facilities • Available to all projects as needed • Execute tasks laid out by Project Managers Miller, Users' Com. Mtg.

  6. Senior Scientific Staff& Faculty Affiliates M.D. Bird I.R. Dixon A.V. Gavrilin R.E. Goddard K. Han P. Kalu C. Luongo W.D. Markiewicz J.R. Miller T.A. Painter J. Schwartz C.A. Swenson J. Toth S.W. Van Sciver R. Walsh H. Weijers Y. Xin Ph.D. Mech. Eng. Stanford M.S. Mech. Eng. ODU Ph.D. Physics Moscow M.S. Geology U. Florida D. Phil. Mat. Sci. Oxford Ph.D Mat. Sci Imperial College Ph.D. Mech. Eng. Stanford M.A. Physics Princeton Ph.D. Physics UVa M.S. Mech. Eng. MIT Ph.D. Nucl. Eng. MIT Ph.D. Physics TAMU Ph.D. Civil Eng. Dresden Ph.D. Physics U. Wash. B.T. Mech. Eng. RIT M.S. Appl. Phys. U. Twente Ph.D. Mat. Sci. Cambridge 12 yrs Resistive & sc magnet dev. 12 yrs. SC magnet anal. & fabrication 23 yrs SC magnet analysis. 19 yrs Microscopy 18 yrs Metallurgy & HSHC 15 yrs Metallurgy 14 yrs SC magnet design 31 yrs SC magnet development 30 yrs SC magnet development 16 yrs SC magnet fabrication 17 yrs SC & HTS magnet dev. 17 yrs SC & Pulsed magnet dev. 10 yrs Finite Element Analysis 28 yrs Cryogenics & HTS dev. 25 yrs Cryogenic materials testing 11 yrs HTS materials & magnets 12 yrs microscopy 300+ years experience in the critical technologies Miller, Users' Com. Mtg.

  7. Highlights of Past Achievements World’s highest field hybrid World’s highest field resistive magnets Florida poly-Bitter Tech. 45T now 47-48 after rebuilding outsert 60T ZMD 65T Gap 66 World’s highest field pulsed user magnets Unequaled ultra-wide bore 900MHz NMR Miller, Users' Com. Mtg.

  8. Synergy in Work for Others Nijmegen Resistive Magnets m-collider/n-factory ANL-APS SC Undulator MSU Sweeper BWXT SMES IPR SST1 Miller, Users' Com. Mtg.

  9. Synergy in Work for Others • Duksung • Analysis and design of protection systems for persistent magnets • MTech • Analysis of quench and protection of HTS magnets • Sandia • Production of pulsed-magnet coils for EM launch • Radiography magnets • Frankfurt • 60T pulsed magnets for research • Tsukuba • Production of 30T resistive magnet • Grenoble • Production of 20T, 200mm bore resistive magnet Miller, Users' Com. Mtg.

  10. Work for others Pulsed Fields Core projects Developed NHMFL Technology Present NHMFL Projects Future Development Conductor: Reinforcement: Shell: Geometry: Leads: Insulation: Winding: Miller, Users' Com. Mtg.

  11. Grenoble Polyhelices New Technology: New Materials! (Funding?) 32 T, 50 mm; 35 T, 32 mm; 28 T, 50 ppm 2005 50 mm Dil Fridge Site (Not funded) 20% Power Upgrade 2006 10% Field Upgrades! (Not Funded) Florida-Bitter Insert - 1999 CICC Outsert NHMFL Florida-Helix (10% field increase) (Not Funded) New Technology: FIRS Magnet! 2004 ~ 2007 New Technology: Conical Florida-Bitter! (Not Funded) New Technologies! HENPEC Flux Tubes Shims, etc. Pursue 50 T DC! (Funding?) Series-Connected Hybrids for condensed matter, neutron or photon scattering at NHMFL, Argonne, Oak Ridge, etc. 45 T Hybrid - 2000 Series-Connected Hybrid ~ 2009 2nd GRANT CYCLE Powered Magnets Jan. 2001 33 T, Florida-Bitter magnet - 1996 Jan. 2008 5th Grant Cycle Jan 2013 3rd Grant Cycle 4th Grant Cycle

  12. Series-Connected Hybrid(funded for conceptual & engineering design) 1.8-m Man Resistive Insert Supply Cryostat Superconducting outsert Outsert services duct Water-cooling and electrical supply for the resistive insert Miller, Users' Com. Mtg.

  13. Power & protection circuit 20-kA 2-kV breaker 0.1-W dump SCO 0.14 H 20-kA 500-V dc PS 0.007 H 0.005 H ~10 kW RI 0.025 W Miller, Users' Com. Mtg.

  14. Size comparisonvs existing systems 45-T Hybrid 32-mm bore 30 MW SCH 35 T, High-homo. 40-mm bore 10 MW 33-T All-Resistive 32-mm bore 20 MW Miller, Users' Com. Mtg.

  15. SCH CICC configurationcompared to 45-T Hybrid Miller, Users' Com. Mtg.

  16. Why a Series-Connected Hybrid? • Naturally improved field quality relative to resistive-only systems • less ripple (higher L/R) • higher uniformity (larger, lower-current “windings”) • Reduced engineering demands relative to conventional hybrids with separate power supplies • elimination of insert-trip over currents • reduced fault forces • lower peak fields (outsert never charged alone) • Operational benefits • ~ 1/3 the power of a comparable resistive-only system • opportunity for simultaneous service • fits a standard resistive-magnet cell • better overall economy/quality of service than either all-resistive or conventional hybrid • Technology with broader appeal outside the “magnet-laboratory” setting Miller, Users' Com. Mtg.

  17. Status • Solicitation for advanced Nb3Sn wire distributed to vendors. • Samples of candidate CICC conduit alloys obtained from vendors, characterization in progress. • Feasibility of fabricating CICC in ~1km lengths on in-house equipment demonstrated. • Structural analysis of benchmark winding pack underway. Thermal analysis (including effects of ac losses) to begin soon. • Design approach for HTS current leads being validated by fabrication and test of 11kA leads for 45T Hybrid. Solicitation for HTS tape for 20kA SCH leads in progress. • Design of facility for testing SHe circulation pump complete, components ordered, 100m dummy CICC fabricated on in-house equipment, contract for engineering mods to in-house pump being let. • Plans for power-system upgrades in place (continuous operation at 600 V, 20 kA will be available). Miller, Users' Com. Mtg.

  18. Provisional Requirements • Field – 35 T (1.5 GHz NMR) • Clear warm bore – 40 mm (inside shim set) • Field quality • Spatial homogeneity, < 1ppm, 10mm DSV • Temporal stability, ~10ppm, ~ 2ppm with feedback • Repeatability of set point, ? • Set point resolution, ? • Vibration, ? • Field control • Time at field, continuous? • Ramp rate, 100 A/s, faster? • Step size and hold time, ? • Duty cycle, ? • Ramp through 0, ? • User interface • Access? • Probe length? • Other features? • Fringe field? • System lifetime/mean time between failures? Miller, Users' Com. Mtg.

  19. Persistent Magnet Options(none yet funded) • 21T FT-ICR • 25T Research Solenoid • Very High Field NMR • An alternative Miller, Users' Com. Mtg.

  20. 21T FT-ICR(not yet funded) • Special requirements • Horizontal orientation • Long, large-diameter region with moderate uniformity and stability • Direct access to experimental region • Limited stray field • Approach • LTS technology • New, improved, high-strength conductors • General improvements to intra-coil materials and components • New designs for cold, inter-coil structures • Compact and efficient HeII cryostat design • Involve commercial sector to the greatest practical extent • Technology needs • Improved and expanded database for materials and components • Careful modeling and test of critical components • No inventions needed • Cost and schedule • 10+ M$ • 7 years to turn on (tech-limited schedule) Miller, Users' Com. Mtg.

  21. 25T Research Solenoid(not yet funded) • Special requirements • Very high field (too high for LTS alone) • Moderate cycling, 0 to high field • Approach • LTS/HTS technology • Improved, high-strength Nb3Sn • HTS tape conductors • Bi-2212 • Bi-2223 • General improvements to intra-coil materials and components • 4.2K bath cooling • Involve commercial sector to the greatest practical extent • Technology needs • Improved and expanded database for materials and components • Careful modeling and test of critical components • No inventions forseen • Cost and schedule • 8-10 M$ for LTS section • ? for HTS section • 6 years to turn on (tech-limited schedule) 25T RS 900 MHz Miller, Users' Com. Mtg.

  22. VHF NMR(not yet funded) • Special requirements • Very high field (too high for LTS alone) • Very high uniformity and temporal stability (persistence?) • Approach • LTS/HTS technology • Improved, high-strength Nb3Sn • HTS conductors (yes, but not much else settled) • Bi-2212 or Bi-2223? • Wire or tape? • Wind-react or react-wind? • General improvements to intra-coil materials and components • 4.2K bath cooling? • Involve commercial sector to the greatest practical extent • Technology needs • Improved and expanded database for materials and components • Careful modeling and test of critical components • Probably need new materials (HTS wires), components (HTS/LTS joints), and processes • Cost and schedule • 10+ M$ for LTS section • ? for HTS section • 8-10 years to turn on (tech-limited schedule) Miller, Users' Com. Mtg.

  23. An alternative:Driven 1.1GHz NMR(not yet funded) • Special requirements • Very high field (too high for LTS alone) • Very high uniformity, but not fully persistent • Approach • LTS/HTS technology • Improved, high-strength Nb3Sn • HTS tape conductors • Bi-2212 • Bi-2223 • General improvements to intra-coil materials and components • 4.2K bath cooling • Involve commercial sector to the greatest practical extent • Technology needs • Improved and expanded database for materials and components • Careful modeling and test of critical components • No inventions foreseen • Cost and schedule • 10+ M$ for LTS section • ? for HTS section • 6-7 years to turn on (tech-limited schedule) Miller, Users' Com. Mtg.

  24. MS&T is poised to apply its unique capabilities for analysis, design, development, fabrication, and test to meet the NHMFL’s challenges for future high-field magnet systems.The remaining key ingredient is the specification of users’ needs. Miller, Users' Com. Mtg.

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