SuperB IFR mechanics of IFR prototype – by C. Fanin Design by Claudio Fanin, INFN PD Cross section of 65x65 cm2 Composed by 46 plates, 2 cm thick, welded to a base of beams Horizontal position for test beam Vertical position for cosmics Thickness layout as Gigi mail: |2|2|   16   | 8  |  8 |  8 |  8 |  8 |  8 |   14  |  10 | Overall thickness as CDR = 920 mm Layers thickness can not be modified Slots accessible from sides Mass ~ 4t 2009/12/02 Massimo Benettoni

SuperB IFR mechanics of IFR prototype – by C. Fanin Removable surrounding beams would allow vertical position for cosmics 2009/12/02 Massimo Benettoni

SuperB IFR mechanics of IFR prototype – by C. Fanin Prototype vs test beam trolley seems easily unstable Claudio going to add legs fixed to the 4 corners to ensure stability 2009/12/02 Massimo Benettoni

SuperB IFR Work in progress on IFR Remodeling of Babar IFR in progress to understand how it is assembled, how increase it and perform structural simulations of the different scenarios 2009/12/02 Massimo Benettoni

SuperB IFR Outer side instrumented layer There should be already a 30 mm gap between arch/cradle beams and wedges. To check if the gap is there or it was foreseen to compensate wedges tolerances In case steel is not added to barrel, to be studied if and how connection plates between beams and wedges could be removed or reduced 2009/12/02 Massimo Benettoni

SuperB IFR Stainless steel filling Brass cost is about 130% higher than austenitic s-steel aisi 304 (7€/kg vs 3€/kg) Standard austenitic s-steels are defined “amagnetic” because paramagnetic with very low relative permeability, less than 1.02. Austenitic s-steels plates, being laminated, could be slightly magnetic. Post production annealing of rolled s-steel laminated plates can lead to large deformations. To be investigated if can be requested to s-steel producers fully annealed plates. Annealing and/or special alloy extracosts could be 10% each, thus s-steel cost taken in account should be 3.6 €/kg. Using s-steel for IFR filling could allow savings of ~ 200 k€ 0910 low permeability ssteel plates seems feasible, but this is based just on one positive answer from a single company: otokumpu Filling material Must meet both magnetic and geometric (planarity) requirements Filling would be done in a factory on nake wedges: w.r.t. Babar filling, this make work easier, it could allow drilling, point welding, screwing ….maybe ticker plates? 2009/12/02 Massimo Benettoni

2009/12/02 Massimo Benettoni