Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology Status on SMC & RMC Models J.C Perez on behalf of SMC collaboration team

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology What’s SMC? Tests results on SMC3_a Coil fabrication for SMC3_b SMC_11T From SMC to Fresca2 through RMC Sub-scale models activities Next SMC & RMC Coils April 24th 2012 J.C. Perez TE/MSC-MDT 2

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 3 SMC is a tool to learn and test :  Technologies needed for a Nb 3 Sn based high field magnet fabrication: Cable insulation Coil reaction Coil impregnation Trace fabrication Bladder fabrication  Techniques of coil fabrication and magnet assembly Winding Coil instrumentation and Protection Structure instrumentation Magnet assembly with bladders and keys Nb 3 Sn/Nb-Ti cable connection SMC is a tool to qualify:  Nb 3 Sn cables in a real magnet configuration SMC is the “STEP 0” to build a Nb 3 Sn accelerator magnet for EuCARD-WP7 and at CERN

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 4 Iron yoke Vertical key Lateral pad Vertical pad Racetrack coil Longitudinal rods Longitudinal compressing system for the rods Coil pack and Iron yoke mounted in the instrumented Al2219 T851 shell

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology 12/12/2011 J.C. Perez / TE-MSC- MDT 5 Double pancake race-track coil configuration High field zone located in the straight part of the central island thanks to the presence of end-spacers Titanium spacers & end-saddles Nb 3 Sn/NbTi splice integrated in the end-saddle connection side Instrumented with Vtaps and stain gauges using dedicated printed circuits (“Traces”) J.C. Perez / TE-MSC-MDT

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology 2 coils for SMC3 with PIT 14 x Ø1.25 mm strand with Ti-islands and spacers wound in November 2010 Cable insulated with S2-Glass sleeve (FNAL type) Electrical insulation of the central island on the layer jump area with ceramic 989F Heat treatment in a vacuum CERN Coils potted using Epoxy NY 750 & Jeffamine D-400 Electrical problems on spacers insulation, low longitudinal pre-load Magnet assembled in May st assembly: 2 runs of cold powering tests performed in the new vertical test station (SM18) in June and September nd : reloading to increase pre-stress on coils and magnet retested in December J.C. Perez / TE-MSC-MDT

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 7 91 % Courtesy of H. Bajas 74 % 85 % 95 %

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 8 Status 2 coils for SMC3_b using PIT 14 x Ø1.25 mm strand with Ti-islands and spacers wound in September 2011 Electrical insulation of the central island and spacers with Al 2 O 3 plasma spray coating Cable insulated with S2-Glass sleeve (FNAL type) Plan Heat treatment on Argon atmosphere CERN or CEA-Saclay scheduled on May 2012 (CERN furnaces failure) Coils to be potted using Epoxy NY 750 & Jeffamine D-400 Magnet assembly scheduled end Q Cold powering tests scheduled during summer 2012

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 9 Single pancake coil configuration Cable dimensions: 14.7 * 1.27 mm 2 * 37 turns I ss : AB peak : T Cable insulation: 150 µm S2-Glass braiding directly on the cable 90 µm Mica (*) with 70 µm S-Glass braiding (*) Cablosam® AP - PG by Von Roll

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 10 SMC RMC FRESCA2 RMC goals: test FRESCA2 cable and FRESCA2-type coils in realistic conditions Constraints 1.Layer jump similar to FRESCA2 2.Power supply limit ~20 kA 3.Magnet OD: 570 mm Courtesy of M. Timmins

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 11 RMC coil FRESCA2 coil Same design as SMC – 2 end spacers – 33 turns (like FRESCA2) FRESCA2-type layer jump As a result – Straight section: 300 mm 150 mm in SMC – Coil length: 820 mm 500 mm in SMC – 96 m of cable per coil 4.0 km of strand Courtesy of P. Ferracin

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 12 RMC configuration – 2 RMC coils I ss (1.9 K) = 18.3 kA – Below power supply limit B peak = 16.0 T – Significantly higher forces From 2.2 MN/m in SMC to 5.4 MN/m – New structure required Thicker shell, new yoke design, larger bladders, larger axial rods RMC

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 13 Still possible to test individual coils up to 20 kA Corresponding to about 93% of I 4.2 K

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 14 Mechanical structure design finished. Fabrication drawings are expected end of April. First mechanical assembly using an instrumented aluminum dummy coil scheduled for September First cold test expected Q4-2012/Q Fabrication drawings for coil components, reaction and impregnation tooling approved for execution First winding scheduled for September 2012

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 15 Characterization on strand and cable performance Layer jump area Splicing area Insulation method Traces connection Impregnation method Qualification of new vacuum impregnation tank Qualification of new oven

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 16 Rail Nb 3 Sn/ NbTi Splice Insulating plate NbTi Lead Nb 3 Sn Cable End Shoe Filler piece Copper stabilizer

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 17 R6 R5 R4 R3 R2 R1 Central PostSpacers set R 1000 V ( R1 to R6) R 2500 V ( R1 to R6) Central post Central post Central post Central post Central Post 1 after Thermal 77 K Central Post 1 after Thermal C Spacers are coated with Plasma Spray Al & Ni/Cr 80/20

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 18 Fibers – Desizing: test heat process vs. chemical process – Sizing: palmitic acid (machine under construction) vs. inorganic sylane (if they exist …) – E-glass vs S2-glass: how much do we gain ??? Tapes – Procure and perform mechanical tests on possible tapes – Combine mechanical tests with electrical tests on impregnated fibers – Make available a proper tooling or supplier for the tape wrapping Braiding – Machine ready to braid from 8 to 22 mm wide cable – Procurement of S2 yarn under study – Big question to solve the sizing Ovens to test fibers – Very small oven available (diameter 40 mm length 40 mm) – New oven available (160 mm diameter and useful length for this kind of test 350 mm)

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 19 Traces design and CERN using 50 µm Kapton® and 25 µm stainless steel sheets. The connections will be hidden in a pocket machined on the end-shoe connection side (mold released) No wires will come out from the mold during impregnation process After coil impregnation, wires will be soldered to the traces and routed via a groove machined on the end-shoe (local impregnation)

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 20 Characterization on strand performance in realistic conditions (SMC4 & SMC5) Characterization on strand and cable performance in realistic conditions for wide cables ( RMC) Layer jump area (RMC) Splicing area (RMC) Braided insulation (SMC & RMC) Traces connection (RMC) Impregnation method for Fresca2 type coils (RMC - Close mold) Qualification of new vacuum impregnation tank. Qualification of new oven (SMC & RMC) SMC DS 11T Fresca2

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 21 SMC AssemblyCable TypeCable InsulationScheduled SMC#3_bPIT 14 * Ø 1.25 mm S2-Glass sleeve FNAL type 2 Coils waiting for reaction SMC#11T_aOST RRP 108/ * Ø 0.7 mm 33 Tex S2-Glass braided Q SMC#11T_bOST RRP 108/ * Ø 0.7 mm 11 Tex S2-Glass braided & Mica 90 µm Q SMC#4PIT 18 * Ø 1.00 mm S2-Glass sleeve 100 µm or S2-Glass braided Q SMC#5RRP 18 * Ø 1.00 mm TBDQ4-2012

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 22 RMC AssemblyCable TypeCable InsulationScheduled RMC#0 coil 1Cu 40 * Ø 1.0 mm S2-Glass braided Or according to FRESCA2 choice Q RMC#1 coil 1PIT 40 * Ø 1.0 mm S2-Glass braided Or according to FRESCA2 choice Q RMC#1 coil 2PIT 40 * Ø 1.0 mm S2-Glass braided Or according to FRESCA2 choice Q Conductor availability? RMC#2 coil 1RRP 40 * Ø 1.0 mm S2-Glass braided Or according to FRESCA2 choice Q RMC#2 coil 2RRP 40 * Ø 1.0 mm S2-Glass braided Or according to FRESCA2 choice Q Conductor availability?

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 23 7 SMC coils have been produced until today 2 SMCs : SMC#1 and SMC# 3 have been completely assembled and cold tested 2 types of Nb 3 Sn cables (IT and PIT) have been used 2 types of insulation techniques, tape and sleeve, have been tried Bladder design and production have been qualified The impregnation method, using an open mold, shows good results for this type of coils Lessons learned during SMC#1 fabrication and applied for SMC#3 improved significantly the magnet performance The excellent results obtained with SMC#3_a assembly must be confirmed on SMC#3_b where we seek to repeat performance and eliminate electrical problems between coils and spacers SMC#4 and SMC#5 will be used to compare PIT and RRP cables

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 24 RMC will be used to characterize strand and cable performance in realistic conditions for wide cables RMC coils will be used to validate technical choices to be applied on Fresca2 coils fabrication RMC design and fabrication drawings are ready RMC structure delivery scheduled for September 2012 First RMC coil using a copper cable will be wound Q3_2012 First RMC cold powering test with a single coil configuration is scheduled for end of 2012/early 2013

Eucard-WP7-HFM 9 th Collaboration Meeting at Warsaw University of Technology April 24th 2012 J.C. Perez TE/MSC-MDT 25 H. Bajas, M. Bajko, B. Bordini, S. Canfer, S. Clement, G. de Rijk, G. Ellwood, P. Ferracin, J. Feuvrier, E. Fornasiere, R. Gauthier, C. Kokkinos, M. Guinchard, J. Humbert, P. Manil, A. Milanese, M. Timmins, L. Oberli, J.C. Perez, F. Rondeaux