Status of material tests G. Arnau Izquierdo LHC Collimators Phase II, CDM2 17.07.08

Molybdenum plates, for the Rib Framework Need according to last design version of the Rib:15 x 50 x 1100 mm³ Standard dimensions at Plansee: 10 x 500 x 600 , 12.7 x 400 x 600 and 20 x 400 x 600 Special fabrication 15 (±5%) x 50 (±2) x 1100 (+5/-0) possible Guaranteed flatness 1.5 mm Dull surface (hot rolled and pickled) Minimum order 11 units, price 195.3 €/kg Delivery time 8 weeks a.r.o. Order placed for a plate 20x50x400 mm³ for tests 262 €/kg, 1048 € Delivery 23.7.2008 ex works Tests foreseen Machining: hippodrome holes for shafts, surfacing, threaded holes? Welding? Dimensional stability. What machining?, what thermal cycle ? Outgassing after machining + standard cleaning. What cleaning ? Other? Mechanical tests of pin and screw assemblies, … LHC Collimators Phase II, CDM2 17.07.08

Mo screws LHC Collimators Phase II, CDM2 17.07.08

Molybdenum tube, for the Cooling Coil Framework Need according to last design version OD10 x 1 x 3750 mm Tight bending Rmin = 1.8 x OD Standard dimension at Plansee Max length ~3000 mm  a weld is needed to get 3750 mm Impossible to bend to requirement Order placed for tube in stock Two tubes 1260 mm + 1800 mm 2460 €/kg, 2079 € Delivery expected from 4.08.2008 Tests foreseen bending welding If successful, Cu-coating and casting of Cu-diamond LHC Collimators Phase II, CDM2 17.07.08

Diamond composites, for the Jaw Preliminary tests of UHV coampatibility Two samples of Cu-D and Al-D proposed by L. Weber. Ready available, irregular shape Outgassing tests made by I. Wevers Cu-D: 2x10-12 torr·l·s-1·cm-2 Al-D: 10-11 torr·l·s-1·cm-2 Preliminary results compatible with standard UHV use Further steps Functionally interesting? Study feasibility of required dimensions Tests foreseen Thick coating for machining Brazing to ceramics and to copper Radiation effect on properties Other… 5mm LHC Collimators Phase II, CDM2 17.07.08