NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 1/18 SHORT MODEL COILS PROGRAM SMC meeting #18 Pierre MANIL CEA/IRFU/SIS 1. SMC assembly Modeling, Conception, Outstanding points 2. SMC tooling Bladders & Slipshims, Bladder testing device, CERN implication 3. Ceramic insulation winding RAL experience, possible improvements 4. Schedule Back on the agenda…

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 2/18 1. SMC assembly P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 2/18

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 3/18 SMC ASSEMBLY 1/3 MECHANICAL DESIGN PRINCIPLE Y-pad (iron-steel) External tube (aluminum) X-pad (iron-steel) Yoke (iron-steel) COIL PACK Keys (iron) Bladder location courtesy of François Nunio, CEA Y X Z Shell-based structure: -Aluminum shell -Iron & steel pads -Iron & steel yoke Pre-stress at room temperature w/ bladders and keys (in the models to come, the keys width will include their own nominal size + the interference key gap) In-situ stress control -on tube -in coil pack  We have to combine relevant shell pre-stress (controlled by tube’s thickness) and bladders pre-stress (controlled by keys interferences) to define the range of coil pre-stress

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 4/18 SMC ASSEMBLY 2/3 KNOWN / UNKNOW… Courtesy R. Hafalia H. Félice Coil properties OK  expected field OK Rods geometries TBD Interface with external world TBD Interface between RAL’s coil pack And assembly TBD Instrumentation TBD Lateral prestress OK Bladders being tested Assembly parameters OK r yoke ~230 mm e tube ~20 mm Iron extension OK Detailed conception TBD Finer mechanical studies TBD - Sensitivity - Mouting steps modeling… Picture= SD01 magnet (as an example)

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 5/18 2D MODEL r yoke 230 e tube 20 ixix 300 iyiy 0 µ MPa-125 MPa -92 MPa -140 MPa-129 MPa -52 MPa -156 MPa-136 MPa -37 MPa -163 MPa-140 MPa 20% 50% 100% 120% 100% Lorentz 138 MPa 270 MPa 168 MPa 52MPa 80 MPa 147 MPa No separation Bladder Cool- down σxσx σ VM -102 MPa-113 MPa -31 MPa-43 MPa Lorentz 107 MPa 225 MPa 80 MPa 93 MPa 70 MPa 137 MPa Bladders + Cooling Very homogeneous ~ -110 MPa Very homogeneous ~ -35 MPa Very homogeneous ~ -120 MPa

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 6/18 SMC ASSEMBLY 3/3 PRESENT STAKES  3D modeling (CEA part) - defining rods prestress and geometries - validating the whole structure comportment  Mechanical steps - validating the new bladders (see next part)  integrating 60 mm-wide bladders in the structure with Federico - validating the LHC iron needs - detailed conception and drawings  Interface with the coil pack (coherent conception): - how to offset the different coil pack sizes?  Horseshoe or shims (SMC size: x mm – ceramic insulated coil size: x mm) - what horseshoe geometry? - current leads  Superconducting cable needs I confirmed this week to Thierry Boutboul and Federico that we need: - 80 m for Saclay (1 dipole = 2 double pancakes) m for RAL (2 dipoles)

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 7/18 2. SMC tooling P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 7/18

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 8/18 SMC TOOLING 1/3 BLADDERS AND SLIPSHIMS  Bladders are 420 x 60 mm (SD01: 320 x 54 mm)  A set of 3 has been manufactured for tests and qualification  Laser winding all along, supplier test under 5 bars pressure  Slipshims are 570 x 62 mm, already manufactured Laminated steel shims Courtesy R. Hafalia

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 9/18 SMC TOOLING 2/3 BLADDER TESTING DEVICE Von Mises stresses for i x =300 μm Strain gauge

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 10/18 SMC TOOLING 3/3 CERN IMPLICATION  Final test cryostat has been identified at CERN (with Christian Giloux & Patrick Viret in Remo Maccaferri’s lab) - AUTOCAD drawings are available (for integration at Saclay) - Power supply is OK (up to kA available – quench current around 14 kA) - Thinking asked about external residual field: seems to be OK  CERN has to supply: - water compressor or hand pump (very high pressure ~500 bars) - instrumentation & electronics apart from mechanical (uniaxial?) gauges on assembly - hydraulic press for rods prestress Courtesy R. Hafalia

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 11/18 3. Ceramic insulation winding P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 11/18

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 12/18 CERAMIC INSULATION WINDING 1/4 SMC WINDING TRIAL 2 (RAL work)

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 13/18 CERAMIC INSULATION WINDING 2/4 POSSIBLE IMROVEMENTS  Cable clamping during winding - improving clamping on straight sections (butterfly screws…) - adding clamps on heads (cf. picture) - thinking about the need for final compression of the pancake for planarity  ’S’ layer transition - softening the edges - machining a head clamp to maintain the transition - thinking about pre-forming… Question : are metal shavings due to screws a danger?  if it is: Teflon screws? Courtesy Ph. Daniel- Thomas

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 14/18 CERAMIC INSULATION WINDING 3/4 NB3SN QUADRUPOLES We will use Nb3Sn quadripoles’ winding machine for ceramic insulated coil. To re-design: -Support and fixation plate -Coil pack ends -Winding clamps Courtesy M. Segreti Rotating support (re-used) Cable stock Fixation plate Coil pack end

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 15/18 CERAMIC INSULATION WINDING 4/4 OVERLOOK ’S’ layer transition Titanium parts Clamping (or alternative solution)

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 16/18 4. Schedule P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 16/18

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 17/18 SCHEDULE 1/2 Steering committee of October 15 (CERN) : Deadlines for Saclay: - SMC support structure (+ tooling) for June 15 - Ceramic-insulated coil for late October  Mechanical caraterization of ceramic insulation Courtesy G. de Rijk

NED Project P. MANIL – CEA/IRFU/SIS – Short Model Coils meeting #18 – 25/01/2008 – slide 18/18 SCHEDULE 2/2 Starting point: NED deliverable on innovative insulation (EDMS Id ) Next step: Performing “stack tests” on ‘very little’ racetrack coils (5 turns, approx. 5 x 10 cm size) for 3 reasons: -To avoid tin losses -To limit the structural relaxing effect dur to twist pitch -To improve the sample cohesion when reaction prestress is relaxed Winding and tests should be launched during this Trimester CERAMIC CARACTERIZATION 8-stack test (insulated)(without insulation)