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HQ Progress and Schedule

HQ Progress and Schedule. Shlomo Caspi LBNL LARP Collaboration Meeting – CM13 Port Jefferson November 4-6, 2009. Outline. The LARP Program HQ design highlights Coil fabrication Magnet status Summary. LARP - Magnet R&D Program. 1. Nb 3 Sn Technology - TQ Conductor studies

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HQ Progress and Schedule

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  1. HQ Progress and Schedule Shlomo Caspi LBNL LARP Collaboration Meeting – CM13 Port Jefferson November 4-6, 2009

  2. Outline • The LARP Program • HQ design highlights • Coil fabrication • Magnet status • Summary

  3. LARP - Magnet R&D Program • 1. Nb3Sn Technology - TQ • Conductor studies • Coil fabrication • Mechanical support • Modeling tools • Quench protection Reached 238 T/m • 2. Length scale-up - LQ • Coil technology • Quench protection • 3. Design optimization - HQ • Larger aperture • higher energy and forces • Accelerator quality

  4. Completed HQ tasks • Magnetic design: • field quality, conductor field • Mechanical design: • Tooling : • Winding • Curing • Reaction • Impregnation • Cable: • Size • Winding • Alignment and assembly • Ground plane insulation • Traces – voltage taps and protection heaters • Pre-stress, cool-down, power

  5. HQ Collaboration • LBNL - Mechanical design, coil winding, curing, reaction, instrumentation, impregnation and magnet assembly. • BNL - Coil reaction, instrumentation, and impregnation. • FNAL – Magnetic design, end spacers design and fabrication.

  6. Design Concept and Guidelines • Coil alignment • Collars and keys for azimuthal alignment (not for pre-stress) • Maintain full azimuthal contact between coil-island and collar • Bladder and key locations to balance layers pre-stress • Shell based Aluminum structure - final pre-stress during cool-down

  7. HQ Parameters

  8. HQ Model - ANSYS 3D Analysis • Axial pre-load • Azimuthal pre-load • Cool-down • Excitation

  9. HQ - Average Azimuthal Stress Average stress in HQ is 140 MPa but local stress expected to exceeds 200 MPa

  10. Field Quality - With Lorentz forces at 219 T/m DR of 78 mm * Large scale factor to simulate displacements

  11. Protection • Protection Parameters (Quench Pro): • Detection time = 5 ms • Heater delay time • Layer 1: heat diffusion: 15 ms • Layer 2: heat diffusion + propagation = 20 ms • - Coverage = 60 % • Quench propagation velocity = 10 m/s • Dump R = 50 mohm • Hot spot temperature: • 4.2 K short sample: 322 K • 1.9 K short sample: 400 K

  12. Coil Preparation and Fabrication CAD Rapid Prototyping (RP) Wire EDM

  13. Winding and Curing Coil Winding Curing Cured Layer 1

  14. Reaction and Impregnation Reaction Tooling • 72 hr at 210 C • 48 hr at 400 C • 48 hr at 665 C Post Reaction: NbTi Leads, VT, SG. Impregnation Tooling

  15. Impregnated Coil (PC1)

  16. HQ Coil Status • Unit Length (one coil layers 1 & 2, 81m net ) • Add 19m of lead = 100m or16Kg/UL

  17. HQ Coil Status • Practice coils 1 and 2 completed, PC1 instrumented ready for mirror test. • Coil 3 - start reaction November 9 (LBNL) • 3 – Impregnation complete December 11 (LBNL) • Coil 4- ready for reaction (BNL) • 4 - Impregnation complete December 23 (BNL) • Coil 5 – Wind and cure complete November 16 (LBNL) • 5 – start reaction Dec 7 2009 (LBNL) • 5 – Impregnation complete January 30 2010 (LBNL) • Coil 6 – Wind and cure complete December 23 (LBNL) • 6 – Start reaction January 8 2010 (BNL) • 6 – Impregnation complete February 14 2010 (BNL) 17

  18. HQ Structure, Assembly, Test - Status • Collars assembly completed (LBNL). • Pads assembly November 30 (LBNL). • Yoke assembly November 30 (LBNL). • Shell-Yoke subassembly Dec 15 (LBNL). • HQ cool-down test (dummy coils) January 2010 (LBNL).. • HQ01a final assemblyMarch 1 2010 (LBNL).. • HQ01a test March 15 2010 (FNAL). 18

  19. HQ Summary A 120 mm bore, Nb3Sn quadrupole for Phase II is under construction With a current density conductor of 3000 A/mm2 (12 T, 4.2 K) the magnet is expected to reach 15 T at 1.9 K (219 T/m) The magnet is optimized for alignment and field quality Assembly and pre-stressed with an outer Aluminum shell and “key and bladder” technology. Final assembly and testing Q2 2010.

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