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LARP Cabling Status

US LHC Accelerator Research Program. bnl - fnal- lbnl - slac. LARP Cabling Status. Daniel R. Dietderich Nov. 4, 2009 Port Jeff, NY. Outline. LQ and HQ Strand and cable inventory Cable fabrication planning Cables with cores Cable testing at NHMFL. LQ Cable Plan FY-10.

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LARP Cabling Status

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  1. US LHC Accelerator Research Program bnl - fnal- lbnl - slac LARP Cabling Status Daniel R. Dietderich Nov. 4, 2009 Port Jeff, NY LARP CM13 – D.R. Dietderich

  2. Outline • LQ and HQ • Strand and cable inventory • Cable fabrication planning • Cables with cores • Cable testing at NHMFL LARP CM13 – D.R. Dietderich

  3. LQ Cable Plan FY-10 • Relocation of cabling facility is complete • Commissioning machine • NbTi cable test run in two weeks • LQ cable • Shipped 2 UL of FY09 Oct. 27. • Coils 14 &15 • Fabricate 2 UL Jan. 2010 (tentative) • Coils 16 & 17 LARP CM13 – D.R. Dietderich

  4. LQ – RRP 54/61 Strand Inventory – 0.7 mm LARP CM13 – D.R. Dietderich

  5. HQ Cable and Strand Inventory • 1000R • 4UL fabricated and insulated • RRP 108/127 • 1 HQ Coil fabricated • 3 UL of cable remains • 1 UL of strand remains • Cable for spare coil? • 996CR • 3 UL of cable • RRP 54/61 with high Cu LARP CM13 – D.R. Dietderich

  6. HQ Cable Plan FY-10 • 6 +1 UL of HQ cable • Cable fabrication schedule (tentative) • 1 UL Jan. 2010 (if needed) • Same billets are in cable 1000R • 3 UL Feb. 2010 – 88kg due Jan. 31, 2010 • 2 UL Mar. 2010 • 2 UL Sept. 2010 – 75kg due Aug. 2010 LARP CM13 – D.R. Dietderich

  7. Cable Fabrication Procedure • 1st Pass • Fabricate cable slightly over size by 50-100 microns • Stop run at 5m and inspect cable • Inspect cross-sectional images for strand deformation • Measure and facet size at the edge of the cable and correlate it to the cable pitch length. • Anneal at 200C/4 hrs • Softens Cu and cable contracts by ~0.25% in length • Plus the width and thickness of the cable increases • 2nd Pass • Re-roll cable to the nominal thickness: TQ ~ 1.26 mm, HQ ~ 1.44 • Stop run at 5m and inspect cable • Compacts cable making it more mechanically stable for coil winding LARP CM13 – D.R. Dietderich

  8. Dimensional Changes of Strand and Cable • Strand dimensional changes for complete reaction • Decrease in length 0.4-5% • Diameter increases 0.800 mm to 0.816 mm • Anneal after first pass • Decrease in length ~0.2% • Final reaction: • Sample not firmly confined in thickness and width • Decrease in length ~0.2% • For a confined cable? IGC strand ICMC 1997 LARP CM13 – D.R. Dietderich

  9. Cables with Cores • Stainless Steel Core • Can not anneal and re-roll cable • FNAL experience? • Need to anneal strand • OST anneal prior to final draw and twist • Propose using quarantined TQ/LQ strand for this study • Coil winding issues? • FNAL experience • Cable 987 cores • Material experiments for annealed cables • MgO paper tape • S-glass woven tape • Cable sections have been annealed and re-rolled • Need measurements of Ra and Rc MgO Paper removed after cabling Mandrel with slot LARP CM13 – D.R. Dietderich

  10. 304 Stainless Steel LARP CM13 – D.R. Dietderich

  11. MgO Paper LARP CM13 – D.R. Dietderich

  12. S-Glass LARP CM13 – D.R. Dietderich

  13. s B +  Cables Critical Current Measurements of Cable Sample NHMFL Magnet D.R. Dietderich, et al. IEEE Trans. Superconductivity, vol. 9, June 1999, pp. 122-125 NEED information on NEW strand LARP CM13 – D.R. Dietderich

  14. Revisiting cable experiments • New system at NHMFL: SC transformer & strain measurements LARP CM13 – D.R. Dietderich

  15. New instrumentation – Stress-strain Strain gauge Bridge • High resolution mechanical data • Bridges for displacement measurement • Strain gauges for pressure confirmation • Example: Sample rotation at 11 T LARP CM13 – D.R. Dietderich

  16. Displacement gauges test Uneven loading could require future automatic alignment features • Load test to 220 MPa -- He gas leak prevent continues loading of sample • Initial uneven loading with large jumps (friction / sticking?) • More uniform loading above 75 MPa pressure and during unloading LARP CM13 – D.R. Dietderich

  17. VI-results first sample Inductive Stabilized • Zero transverse load, 11 T applied field • Step and hold data: One cable shows preliminary voltage rise • Quench at 10.8 kA for 100 and 200 A/s ramp rates (16 kA is expected) LARP CM13 – D.R. Dietderich

  18. Sample preparation Issues LARP CM13 – D.R. Dietderich

  19. Testing at NHMFL • Future testing at NHMFL has been placed on hold due to billing issues • Initial contract was for 14 days labor • $10,000 • Final bill included 44.4 days (~9 weeks), 31.4 days of extra labor has added to the last testing campaign. • $29,427 • LHe costs increased from $15K to $25K • This was expected • Need to determine the origin of the extra charges. • Charges arrived in Oct. for tests in April LARP CM13 – D.R. Dietderich

  20. Summary & Plans • Hiatus of testing at NHMFL • Wait for test of TQS03 • 200MPa stress • 1,000 current ramp • Need lab interested in HEP issues • Develop concept for testing cables • At CERN – Use LBNL’s transformer • In HD2 • Need to begun the following cable studies: • Annealing strand prior to cabling • Adding cores to cables LARP CM13 – D.R. Dietderich

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