1. 1 ATLAS Upgrade WP4 Face to Face meeting Oxford 14 th May 2011 Richard French – The University of Sheffield Ian Mercer – Lancaster, Martin Gibson, John Mattheson, Ian Wilmut RAL, Georg Viehausser- Oxford Alex Owen, Alex Martin QMUL (Database) Cooling update task 2

2. 2 Production of bending tooling 2.275mm OD: Sheffield now produced bending tooling for Lancs in “odd” sizes, internal formers made, external on machine. (2 finished Mon am) Should have shipped to Lancs yesterday for Ian’s bending trails (minimum only to save material). 10x ball end slot drills precision ground by GKN in Sheffield. 2x to Liv, 2x to Manc, 2x to Lanc (4 spare). Should I get more? £360+ NOTE – this is a horrible size to make anything for – we really need to think if this is sensible! OD’s such as 2.0mm, 2.5mm, 3.0mm are much easier to work with. Fittings Vac brazed stubs ready for collection (6LV VCR to 1/8” OD Ti interface for welding) - must remember to pay Meeting with Sandvik to discuss procurement of raw stock material end July. This is really tricky as the quantities we need are so small, seeing if we can combine something with IBL for this. Production of components Staves & Stavelet tubes: Ian is now producing cooling circuits so I can weld fittings on. This will make available for use the following: 316L stainless all complete CP2 Ti in 1.8” next CP2 Ti in odd ball 2.275mm last

3. Testing of components & assemblies 1.6 &1.2m long objects – Pressure drop measurements: Alexander Bildatze (GLA@CERN) will test baseline materials & diameters plus CP2 Ti when built as circuits (no fittings). These tests will use the C02 (recirculation) plant at CERN as this is the most controllable system we have access to (or that I know of) Schedule: Delivery date for components to Sheffield from Lancs is now 19 th August. The 316L circuits, are complete at Lancs in 316L stainless steel. We need also CP2 Titanium to check if the impedance of he material surface is noticeable difference (could be straight lengths) Weld a joint in the CO2 Ti tube (SMC area) 19 th July RF to Lancs for welding etc. These pipes are usually in form of with our without SMC, 1.2 or 1.6m Stave lengths. [Need to finally determine and have agreement where a joint will be on circuit.] We then need to assemble and leak test each circuit before shipping to save time at CERN. This could be done at CERN but is dependent on manpower. Alex fess from PIXEL testing January 12 (Steve McMahon paying arranged with R.Bates) and will start measurements then. Does this need to go faster as previously had planned for August measurements pre Pixeling.of Alex. Thermal shock etc in the pipe line at some point – John Noviss. I’m in the process of dipping 316L stainless welds in LN2 and seeing how long they last with repeated cycling. 3

4. Database initial testing Database – QM (Alex Owen & Alex Martin) is now running in test format. We will enter data and see how it works in practise. Now have log on ID’s and passwords. Database only functions in ADMIN area. The rest are test pages. MIG brush component ID trials at RAL – MG taking care of. Produces 8 digit code using transfer film and low power electrical arc brush. Lancs and RAL barcode set up functioning. Sheffield (me ) rusty to say the least. 4 Bend testing of Cp2 Ti in 2.275mm OD dependent on tube delivery. There is not much tube spare so we can not carry out a full trial. Lancs. Note from morning half of meeting - CP2 Ti in 1/8” OD – needs bends cross sectioning and examining as we did for the 316L stainless steel. Pressure testing – all switched on and ready. Need to tie in with Martin. Currently working on the principle that “we stay ahead of the programme”. This means that circuits are dribbling (excuse pun) through the system and ready before requests for cooling pipes. I worry that the wheels come off this later on. Need to think about this a little more. This is dependent on circuits from Lancaster to Sheffield for welding. Commercial pickling of Ti now possible – Problem solved from our research and now verified by tests at CERN (document on Cooling TWIKI). 130nm chip testing on track (JM baby break). RB finishing off read out system – due end Aug. JM to relay information to Peter Phillips to distribute to module community. Testing of components & assemblies

5. Procurement plans -ideas Thermals shock testing rig still lurking that will incur a cost. Ti tube procurement, have an extremely limited amount of 2.275mm Ti tube. Is this what we really want? 1/8” CP2 Ti – short lengths, do we need more. Alternative diameter CP2 Ti tube that is not an odd ball size. 2mm?, 2.5mm? Vacuum brazing charge for 20off VCR to 1/8” CP2 Ti stalks. 4H weld head and flexi drive will be purchased. £5k. [Space Cooler 4H has been repaired to better than when we received it.] 4H weld head collets. Tungsten electrodes – running out. BIP Argon and 316L transfer lines [may be needed to crack the 0.14mm wall Ti] Wet electrode grinding machine with 2 axis – tip angle only on workshop machine. Fittings – nothing made yet for 2.275mm Stave –Stavelet (interface to VCR). Bar coding systems, MIG Brush system to mark components with 8 digit number. 2 nd weld system, weld head and facing tooling. Representative test structure with BUS cable and cooling pipe is desirable for chip testing next to arc welding Pressure drop measurement, test set up, materials machining etc. 5

6. Plans from Nov 2011 plus new Nov 2011 RAL meeting Thermal shock work to be continued at RAL – Ian W re-jigged MG’s locker/coffin idea, RAL to produce drawings. Sheff, Lancs RAL fabrication. Can the QM box do the same job? Weld head mods at Sheffield – in talks with weld head manufacturer who can provide a basic, solid small head that we can retrofit anyone’s encoder to (supplier to known Austrian company) Bending to continue at Lancs – improved tooling and possible 3D CNC work – 3D done with manifold work. Waiting for direction. Sheffield producing tooling for small OD Ti. C02 cooling rigs x? On hold for now. Services mock up at RAL supported by Lancs and Sheffield – thick wall welding using RAL M100 = pretty successful. JM to continue blowing chips up – relay information to Peter Phillips to distribute to the community for acceptance. Excellent feedback from Upgrade week (Oxford). Looks very encouraging. From Ox Upgrade week IBL Ti joint order proved very useful. Now looking to reduce wall further for production tube. Order ready, need to sort finance. FEI4 chip testing plus 130nm structures. Representative structure with BUS cable and cooling pipe is desirable. Look at fabrication in mid 2011 to tie in with the chip delivery. Broken welder, damaged weld head, another damaged weld head (detailed later in presentation) Ti VCR fittings – need to source stock from tube supplier as Smiths metals Ti won’t weld as well In-situ tube cutting and preparation. Still 100% test success record. Check VCR faces. 6