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Summary LBNL LSWG meeting

Summary LBNL LSWG meeting. Richard Nickerson. LSWG content All mechanical components Cooling/connectors Power tapes Locking components for GS Shipping containers Text fixtures/boxes/equipment/DAQ/cooling plants Survey equipment Insertion tooling/Assembly equipment

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Summary LBNL LSWG meeting

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  1. Summary LBNL LSWG meeting

  2. Richard Nickerson • LSWG content • All mechanical components • Cooling/connectors • Power tapes • Locking components for GS • Shipping containers • Text fixtures/boxes/equipment/DAQ/cooling plants • Survey equipment • Insertion tooling/Assembly equipment • Assembly of LS, including attaching modules • Quality control of components and materials • Test of assembled local supports • Survey of LS • Shipping of LS • Cost estimation (Richard Nickerson + Andrea Catinaccio) • Atlas Web>Atlas>Upgrade>UpgradeITKLocalSupports • Preliminar agenda: Upgrade week

  3. Tuesday – pm LSWG Weds IWG, Strips Thurs all day – Cooling Assembly: mon/fri

  4. Neal David Hartman • Pixel upgrade layout proposal: Phase 2 pixel layout “NEWPIX” - 2018 • All proposed layouts include a staging option to arrive at the best of both worlds • Assume the utopia medium barrel layout, as it’s the most balanced and buildable option available • Including more disks: infinite variations • Look at services routing and implications in different layouts, material comparison…

  5. Nigel Hessey • Compares Short-barrel, Utopia and Long-barrel options (services not included) • Short barrel: lower cost/work/best pattern recognition • Utopia: is not so different • Long barrel: is worse! • Compares Short-barrel, Utopia and Long-barrel options (services included) • Long-barrel small improvement in the barrel-only region • Long- barrel + pixel produces a wall of services in front of the end-cap strips • Pixel services routing: what if we go directly forwards, not through the strip barrel/end-cap gap? • Compares Utopia, NewPix and layout with variable pixel barrel lengths • NewPix: more services in barrel-endcap gap

  6. George Viehhauser • Cooling; not formal decision about coolant • Issue 1: scale the CO2 cooling system to 200kW? • Issue 2: location? • Re-usability of type II/III (SCT) or type III/IV (TRT) outside services • Current SCT services (calorimeter endplate or PP2) need to be cut and re-connected • Current TRT cables > connect to distribution at PP2 • Strip services • Current SCT or TRT cables> enough Cu for serial and DC/DC (grounding? aging?) • Not enough HV lines to connect every individual sensor (TRT+SCT 5k for 17k sensors) need to consider some kind of multiplexing • New optical fibres • Still need to look into DCS and all pixel services • Positioning requirements • Placement accuracy not important, present system very stable <10um globally with no external perturbation • Track-based alignment can do everything but “weak modes” are hard to compensate by software

  7. W. Miller, R. Bates • Allcomp: Berkeley spin off (Wei Shih and Bill Miller) • Thermal and mechanical test for carbon foam… • Carbon foam strength and thermal properties increase with density (0.22g/cc) • Foam conductivity is weak function of cell size • 130ppi foam processing at 0.2g/cc and above produces higher conductivity than 100ppi foam • Current foam core material for LBNL stave prototypes with embedded cable. • The thermal and mechanical performance is highly determined by components interfaces and assembly/manufacturing processes.

  8. W. Miller, R. Bates • Laminate thermal conductivity • In-plane; micromechanics code “Helius – composites pro” • Transverse; best to measure it! • Recommend new FEA model of co-cured laminate with embedded cable suggested to compare with test results. • Laser diffusivity measurements and comparisons with micromechanics… • Tensile test results influenced by thickness measurement… • Results of predicted and measured conductivities… • Fibre mechanical properties • Sandwich 50x50mm tensile test: face sheet fails – irradiated samples? • K13D2U (0-90-0) + UCF-126-3/8-2.0 + Hysol9396

  9. Marco Oriunno

  10. Tim Jones • Stave thermal cycling • 2m long chamber, Liquid N2 cooling – 50ºC, electrical heater +50ºC; 1 hour cycle time • Overall plan: 50 cycles (visually inspect every 10 cycles) • No sign of delamination after 10 cycles • C channel – face sheet delamination in evidence after 20 cycles • Mass reduction program • Co-cured face sheets sucked onto vacuum jig, although residual curvature difficult to control along the edge • Nearly glueless stavelet (pre-preg to attach face sheet to core components) • Glue film investigations (CNC cuter) • No core stave; CFRP tubes running the full length • Corrugated cores • Radiation length • 2.65% stave • 2.37% supermodule (no bus cable but insertion mechanism included)

  11. William Emmet • Experimental set-up

  12. Franziska Hegner

  13. Nigel Hessey

  14. Eric Anderssen

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