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Richard French, Martin Gibson, Ian Mercer, Ian Wilmut, Georg Viehausser, John hill,

WP4 Monthly meeting #3 18 March 2011 Liverpool. Richard French, Martin Gibson, Ian Mercer, Ian Wilmut, Georg Viehausser, John hill, John Mattheson, John Noviss. https:// twiki.cern.ch/twiki/pub/Sandbox/ATLASUpgradeUKweekly coolingmeetings/Cooling_tube_programme_review_DRAFT.pdf.

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Richard French, Martin Gibson, Ian Mercer, Ian Wilmut, Georg Viehausser, John hill,

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  1. WP4 Monthly meeting #3 18 March 2011 Liverpool Richard French, Martin Gibson, Ian Mercer, Ian Wilmut, Georg Viehausser, John hill, John Mattheson, John Noviss https://twiki.cern.ch/twiki/pub/Sandbox/ATLASUpgradeUKweekly coolingmeetings/Cooling_tube_programme_review_DRAFT.pdf

  2. Update from the last 12 months • Material specific tasks • 1/8” 316L SS fully completed. • 1/8” CP2 Ti welded but not satisfactorily(repeatability) • Oxide removal trials worked well and now refined. Will not work for in-situ repairs. • CP2 Ti VCR fittings, test weld from machined to extruded tube (not good) • Thorium electrode swap to reduce arc temperature for Ti welds • Seam to tack weld programme for 1 heat cycle as opposed to 2 (micro-cracking) under development. • 2.275mm CP2 Ti procured, surface oxide thickness much better from manufacturer • Micro-focus CT x-ray system tested on welds. • Generic tasks • Bar coding of components – labels produced and system in operation. • Thermal shock work – restarted with chilled brine concept from Ian W. • Tube cutting to exact length – Lancs • Ian’s new tooling demmo • Service mock up – dominated most of cooling group in terms of production of parts (bending + manifold from Lancs) and welding. • Weld head modifications – small weld head modified (UoS) and demonstrated to work on services.

  3. Plans for next 12 months Material specific tasks Generic tasks Bar-coding Spark deposition or laser etch trials (inc NDT on tube). Formal database keeping. Thermal shock test Construction & instrumentation + test In-situ tube cutting and tube face preparation Procure smaller weld head. In-situ x-ray system trials on services. Full pressure testing to burst pressure of all production components inc semi-custom VCR Formal writing up of past work into current document format. Services welding for manifold. • 2.275mm CP2 Ti: • New custom collets (manufacture in house) • Welding trials inc NDT and DT, • Bending trials • 2x Stavelet circuits • 3x Staves • VCR fittings for welding • EB or vac brazed Ti stub sections to 1/8” 316L VCR • Fully test epoxy bonded 6LV VCR to CP2 Ti tube. • 1.6m long circuits. • With and without SMC in all tube sizes. • 1/8” CP2 Ti – abandon tack weld programme • Internal gas purge flow /pressure • Make to work over distances >5m • Final oxide removal trials • One off tensile test on welded tube • Finish off CT scan reconstruction and write up. • Define tube joint location in Stave

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