If so what can we learn from them Part one Solenoid fabrication By Charlie Sanabria and Sofía Jiménez Viñolo First Prototype Development of an experiment to explore training behavior in superconducting magnets ID: 1031476
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1. Can we detect signs of training in solenoids?If so, what can we learn from them? Part one: Solenoid fabricationBy: Charlie Sanabria and Sofía Jiménez Viñolo
2. First PrototypeDevelopment of an experiment to explore training behavior in superconducting magnets2Wednesday, March 27th, 201938.1 mm45.47 mm2b = 14.65 mma2 = 21.70 mma1 = 19.05 mmExpected number of turns = 20 x 4 = 80Wire length ≈ 10.24 m Wire + insulation Ø = 0.73 mm Drawing prepared byRay HafaliaOFHC Cu current leadsAlumina washersAlumina-coated Stainless steel mandrelCentering cone (G-10) for testing
3. Wire properties and stress calculationsDevelopment of an experiment to explore training behavior in superconducting magnets3Wednesday, March 27th, 2019 Diameter0.6 mm Non-Cu%56.5% Average RRR200B (T)Ic (A)8*5049*42010*34911*289122381319414156*Extrapolated using the Pong-Ekin scaling spreadsheet“Medium Jc” RRP wire critical current (bold values provided by vendor).“Medium Jc” RRP wire propertiesHoop stress 2b = 14.65 mma2 = 21.70 mma1 = 19.05 mmB (T)Stress on OD (MPa)Stress on ID (MPa)817715591661461015313411140122121261101311197149684Wire purchased by ASC
4. Stress calculations at 9 T Development of an experiment to explore training behavior in superconducting magnets4Wednesday, March 27th, 2019Hoop stressDisplacementIDOD146 MPa172 MPa2b = 14.65 mma2 = 21.70 mma1 = 19.05 mm72.1 µmSimulations by L. BrouwerSliding surface
5. Winding (1 of 4)Magnetic break inside aluminum payoff spool.Back tension constant and capable of unwinding.2.75 lbs. of tension.Development of an experiment to explore training behavior in superconducting magnets5Wednesday, March 27th, 2019Payoff spoolMagnetic break
6. Winding (2 of 4) Development of an experiment to explore training behavior in superconducting magnets6Wednesday, March 27th, 2019March 6th 2019MicalayerSharp turn.
7. Winding (3 of 4) Development of an experiment to explore training behavior in superconducting magnets7Wednesday, March 27th, 20198 mm x 5 mm mica pieces
8. Winding (4 of 4) Development of an experiment to explore training behavior in superconducting magnets8Wednesday, March 27th, 2019Winding speed: ~3.7 RPM number of turns: 18, 17, 17, 17Acoustic sensor will go on top of the mandrelNo voltage taps between layersOne pair of voltage taps will be added after HT.
9. Heat treatment (1 of 2) Development of an experiment to explore training behavior in superconducting magnets9Wednesday, March 27th, 2019Standard “Medium Jc” RRP heat treatment.Recipe:210°C/48h + 400°C/48h + 570°C/24h + 660°C/50hStarting date: Friday 8th, 2019Wrapped with a fiberglass sheet.Inside tube furnace with flowing argon.210°C400°C570°C665°C
10. After heat treatment (2 of 2)Development of an experiment to explore training behavior in superconducting magnets10Wednesday, March 27th, 2019Actual measurement [units]ValueRamp Rate to 210°C [°C/h]44.5210°C temperature [°C]210.8Time at 210°C [h]47.3Ramp Rate to 400°C [°C/h]53.3400°C temperature [°C]399.2Time at 400°C [h]47.7Ramp Rate to 570°C [°C/h]57.2570°C temperature [°C]573.3Time at 570°C [h]24.0Ramp Rate to 665°C [°C/h]55.0665°C temperature [°C]666.4Time at 665°C [h]59.3
11. Current status and future plansPotting and instrumentation in progress.Testing early April.Development of an experiment to explore training behavior in superconducting magnets11Wednesday, March 27th, 2019
12. Improvements for next prototypeDevelopment of an experiment to explore training behavior in superconducting magnets12Wednesday, March 27th, 2019Target turns were not met. Coating thickness or solenoid dimensions could be adjusted.New mandrel design Stronger washers?Prototype 1Prototype 2Interlayer voltage taps… any ideas?Cost reduction alternatives:Leads can be broken in two pieces.Mandrel could be 3D printed.
13. Names?STEP coils (Solenoid Training Experimental Project)SISTER coils (Small Inexpensive Solenoid Training ExpeRiment)T(r)IPS coils (Training and Interphase Probing Solenoid)ETCIE coils (Experimental Training Coil Interphase Exploration)ISETIE coils (Inexpensive Solenoid Experiment for Training and Interphase Exploration) The little coil that could…Development of an experiment to explore training behavior in superconducting magnets13Wednesday, March 27th, 2019