1. 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

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

3. 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

4. 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

5. 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

6. 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

7. 2009/12/02
Massimo Benettoni