N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN1 Straw Material and development. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN2 Latest news on Material. Current development. Database. Plans for future. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN3 Coated Material at CERN spool referencelength in metresLocationDate A1-1320CERN A1-2320CERN A1-3320CERN A1-4320CERN A1-5320CERN A1-6320CERN A1-7210Maud A1-8320CERN A1-9320CERN A CERN A CERN A CERN A Sefar A CERN A Sefar A CERN A CERN A CERN N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN4 Quality Control Mechanical dimensions.(Thickness 50 nm Cu + 20 nm Au.) Resistance .Thickness is monitored by sheet resistance. measurement (by induction) 0.62 Ohm measurement (by induction) 0.62 Ohm Peel test. (Coating to PET) Good. XPS analysis. (Surface analysis) Good correct side coated. Permeation (Effect of Cu thickness and weld; ongoing, run during Xmas). SEM / optical microscope.(Deposit and welds, See M.S. presentation ongoing) Tensile test. (Reference and welded SEFAR samples) Good Creep test. (Compare to GN 4600) Good so far ongoing Ultrasonic welding. RNK 2600 Produced by Sefar are giving good results. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN5 Pretty picture 1: Cu/Au coated Versus naked tube (filled with He in water) N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN6 Current developments Straw ultrasonic welding. A contract is in place for 150 tubes to be delivered , These straws are ready, and will be collected by CERN this week. Parallel study of ultrasonic welded straws by Sefar (Switzerland). Welds are generally good, and pressure tests at 4 bar Over pressure are successful. Study weld position w.r.t the overlap. Overlap is well controlled. Study fusion of weld fusion is good. Study repeatability of manufacture. The next delivery will give us workable statistics. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN7 Plans for Future. Valve delivery planned this week. Bonding Week 51 ! Put a representative sample of tubes under 1.5 bar over pressure (Ar) Measure straw deformation with 2 calibrated loads. Store pressurised straws during Xmas shutdown. Re-measure in January and evaluate leak rate. Summary of Sefars performance. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN8 JINR straws We urgently need straw tubes to test the mechanical and permeation properties of: 1) Standard tubes from RNK ) Tubes with laser treatment form RNK 2600. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN9 Database Base material: CERN order number: CA Material type: RNK Roll reference: /xk Date of manufacture: Length: 1000 metres width 650 mm thickness of film microns weight kg Coated material: CERN order number: CA Coated sided: non treated side Copper thickness: 50 nanometres Gold: 20 nanometres Roll reference: /xk date of coating: Coating reference: co A length coated: 298 metres width useable: 570 mm Metalised side: outside N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN10 Slitting into spools: CERN order number CA Coating reference: co A spool width 31.4 mm Metalised side inside spool reference A1-1 length 320 m useable length 274 m current location CERN Shipped Quality control: Thickess of film mm width of film mm Tickness of metal deposit nm Resistance Ohm Tensile strength N/mm2 EDMS reference document page: https://edms.cern.ch/document/ /1 https://edms.cern.ch/document/ /1 Database N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN11 Conclusions: straws should be ready (tested) for January installation. A provision for the manufacture of 1000 more straws is in place. N. Dixon PH / DT Straw working group meeting Monday 14 December 2010 CERN12 Pretty pictures 2-3: