A funny thing happened on the way to Hi Lumi LHC Trey Holik LHC Accelerator Research Program LARP TD Retreat 26 January 2016 Identical Cable S imilar Insulation DIFFERENT EXPANSION US amp CERN are producing supposedly identical QXF coils ID: 768799
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A funny thing happened on the way to Hi-Lumi LHC… Trey Holik, LHC Accelerator Research Program (LARP)TD Retreat 26 January 2016
Identical Cable, Similar Insulation, DIFFERENT EXPANSION US & CERN are producing supposedly identical QXF coilsSame strand & cable params Same insulation thicknessSame tooling, cross section… Significantly different cable contraction when releasing winding tension and during Nb 3 Sn HT!!!Different Braided-On Insulations alter Cable Growth!!! 1/26/2016 Trey Holik| Braided-On Insulation Alters Cable Growth!!! 2
How? What? WHY??? 1/26/2016 Trey Holik| Braided-On Insulation Alters Cable Growth!!! 3 Cable Contraction Width Expansion Braided Insulation Sock Insulation How does insulation affect cable growth? What? An R&D proposal for discerning how different cable/insulation schemes determine cable dimensional change WHY? May become a ‘New Knob’ for magnet design to minimize dimensional change during HT → reduce risk & cost!!!