Dipole review, January Dipole design review: outlines of talks Gijs de Rijk, Francois Kircher and Jean- Michel Rifflet

Dipole review, January 2011 Dipole design review Date: January 2011 Place: CEA Reviewers: –Giorgio Ambrosio (FNAL) –Lucio Rossi (CERN) –Shlomo Caspi (LBNL) –Akira Yamamoto & Tatsu Nakamoto (KEK) –Yuki Iwasa (MIT) –Pasquale Fabbricatore (INFN Genova) 2

Dipole review, January 2011 Draft agenda (day 1) Introduction 9h00I-1) EuCARD-HFM and its context. (GdR) 15’+5’ II) Technical part 9h20II-1) Overview of the dipole (J-M Rifflet) 15’+10’ 9h45II-2) Conductor choice, properties and procurement strategy (L. Oberli) 20’+10’ 10h15Coffee break 15’ 10h30II-3) Conceptual design (A. Milanese) 30’+10’ 11h10II-4) Engineering design (P. Manil) 30’+10’ 11h50II-5) Quench protection (P. Fazilleau) 15’+10’ 12h15Lunch break 1h45’ 14h00II-6) SMC as preparatory project (J-C. Perez) 20’+10' 14h30II-7) Fabrication process study (M. Durante) 30’+10’ 15h10II-8) Winding and tooling tests and insulation choice (F. Rondeaux) 20’+10’ Coffee break 15’ 15h55II-9) Cooling, heat transfer and cool-down issues (S. Pietrowicz ) 20’+10’ 16h25II-10) Insert interfacing (M. Devaux) 10' + 10’ III) Scheduling and project management 16h55III-1) Magnet design and construction schedule (GdR) 20' + 10' 3

Dipole review, January 2011 I-1) EuCARD-HFM and its context. (GdR) 15’+5’ EuCARD 11 WPs NED heritage HFM: 6 tasks Task 3 dipole, the need for a Fresca (existant 10 T + HF) cable test facility, prospecting for future accelerator magnets and HFM technologies Task 3 EuCard (only) specification for the dipole Task 3, budget situation and explication of budget links Work division between the partners 4

Dipole review, January 2011 II-1) Overview of the dipole (J-M Rifflet) 15’+5’ The specification (boundaries) Size considerations: coil, yoke (scaling laws) Conductor choice –NED heritage –1 mm strand in 40 strand cable choice –Maximize current to minimize L (reference to Luc, Philippe) History of the design Basic block coil (Picture 2D baseline) Shell bladder and key, basic reasons for this 5

Dipole review, January 2011 II-2) Conductor choice, properties and procurement strategy (L. Oberli) 20’+10’ 1 mm strand (detailed explanation) –Compromise between 1.25 mm and 0.8 mm –Cable size: 40 strands, reasons Available providers, history of strand development Procurement strategy Cable design parameters and cabling tests Prototype strands: first results Prototype cable: first results ( sample length ) Comparison with models Jc used for the design (plot) 6

Dipole review, January 2011 II-3) Conceptual design (A. Milanese) 30’+10’ Magnetic design (parameters, plots) –2D (some optimisation reasons, mid plane etc) –3D (max field etc) Mechanical design - Présentation générale de la structure mécanique - Design mécanique global 2D o dimensioning of components o quelques courbes de suivi de certains indicateurs, Option without tube (20 Febr.) Life cycle construction and powering Modèle de calcul mécanique 3D Global structure 7

Dipole review, January 2011 II-4) Engineering design (P. Manil) 30’+10’ Géométrie de la bobine : –Bending test –Saut de couche –Etude géométrique –Longueur de câble Présentation de la structure –Points critiques : support des têtes, bladders… Detailed engineering –Usinabilité / choix des matériaux : tube, tolérances, surfaces complexes… 8

Dipole review, January 2011 II-5) Quench protection (P. Fazilleau) 15’+10’ Only a feasibility study not yet design decisions Quench development, current decay, T max, T av, V max Circuit parameters : dump resistor Quench heaters : needed ?, test usage Quench behaviour at 1 T, 5 T, 10 T and 13 T Gradients T during quench (for later mechanical modeling) Parameter space 9

Dipole review, January 2011 II-6) SMC as preparatory project (J-C. Perez) 20’+10' Aim of the SMC series SMC description SMC program (table with magnets / coils, dates, 7 coils ) SMC1 test results Lessons learned up to now SMC3 progress Future work (SMC4 40st) and aims 10

Dipole review, January 2011 II-7) Fabrication process study (M. Durante) 30' + 10’ Question: which tooling is needed and what are the critical issues ? Insulating Winding Mould mounting Reaction Preparation for impregnation –Island manipulations –Splicing –Instrumentation sheets –Ground insulation Moulding Mounting the structure Coil pack mounting Bladder and key operations 11

Dipole review, January 2011 II-8) Winding and tooling tests and insulation choice (F. Rondeaux) 20' + 10’ First winding feasibility test April 2010 Winding tests foreseen Reaction mould design and tests Insulation schemes available Insulation scheme choice process Moulding material and tests 12

Dipole review, January 2011 II-9) Cooling, heat transfer and cool-down issues (S. Pietrowicz ) 20' + 10’ Temperature and heat model of the magnet Steady state heat deposition at 4.2 K Steady state heat deposition at 1.9 K Cooldown scenario Stresses in the magnet during cooldown 13

Dipole review, January 2011 II-10) Insert interfacing (M. Devaux) 10' + 5’ Insert layout Insert mounting Field with insert Quench of insert Quench of dipole Risk scenarios 14

Dipole review, January 2011 III-1) Magnet design and construction schedule (GdR) 20' + 10’ Task breakdown Design and construction flowchart with decision points Design and construction schedule (incl SMC4) Potential bottlenecks 15