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TI development for IBL and perspectives for SLHC

TI development for IBL and perspectives for SLHC . IN2P3. Why Titanium for cooling circuits?. Titanium material collect the most important criteria for cooling circuit design:

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TI development for IBL and perspectives for SLHC

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  1. TI development for IBL and perspectives for SLHC IN2P3

  2. Why Titanium for cooling circuits? • Titanium material collect the most important criteria for cooling circuit design: • Low CTE: important parameter to reduce material necessary for geometrical stability and improvement of material delaminations • Good Thermal conductivity: essential for thermal performances and material economy • Non corrosive • Good weld ability • Good Bend ability • Ultra thin pipes can be produced • High mechanical characteristics • Low activation under irradiation • X0% more interesting the Stainless Steel (X0 Ti /X0 316 L ≈ 2  2 mm ID, 0.1mm Thickness Ti pipe  2mm ID, 0.05mm Thickness 316L pipe for material conservation)

  3. Progress made @ IN2P3 (LAPP, CPPM) • Several Batches have been produced and tested @ IN2P3 • All pipes were ordered @ Minitubes (Grenoble, France) but price is very high. A new vendor (UK, Schefield) Is under qualification for IBL • Welding process for joining is well controlled (Laser and EB welding have been tested with success) • Bending process have been tested with success needs more improvement if small bending radius needed

  4. Welding process Laser welding • Both Laser weldingandElectron beam have been qualified • The two techniques require a controlled gap between the pipe and the fitting to avoid shrinkage • Specific cleaning has to be applied to avoid welding porosity • The last test made was perfect in terms of weld quality and has been tested under CO2 conditions (150 Bars proof test & -50°C thermalshocks) EB welding

  5. Bending Process • Partial Bend test was made with success using sand filling and manual bending operation (same technique used for pixel piping) • Ti pipes annealing is more complex due to high temperature and risk of oxide formation (vacuum or controlled atmosphere needed) • More work remain to be done to optimize the technique, but no show stopper

  6. Toward Upgrade • Type and dimension of Ti pipe have been almost frozen for IBL Project • Meanwhile some R&D could be done to minimize material involved by Ti piping: • Pipe distribution, actually one pipe is used/stave in the barrel we could study the pipe sharing between two or more stave structures • Pipe thickness is linked to the maximal pressure applied and inside diameter  optimization of the cooling parameters (pipe ID) would permit to get thinner pipes (the production limit is about 0.05mm thick pipes @ Minitubes company) Thickness can be reduced linearly with the inside radius

  7. Toward Upgrade • New Ti alloys should be also investigated while some grade gives higher mechanical resistances  close collaboration with manufacturers

  8. Pipes order • Titanium (ordered) • Type 1 : • ID : 2.00+0.05/-0.00mm • Thickness : 0.10+0.05/-0.00mm • Nom OD = 2.275mm • 3 m (+/-10.00mm) X 20 pieces (total length 60m) • £46.75 per metre = £2805 • Type 2 : • ID : 0.80+0.05/-0.00mm • OD x 1.2+0.05/-0.00mm • Nominal Thickness = 0.20mm • X 3 m (+/-10.00mm) X 20 pieces (total length 60m) • £49.50 per metre = £2970 • Delivery ? 8

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