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D. Lynn For BNL/Yale, Stave-09 Meeting, Oct 22 nd , 2010

BNL Yale Mechanical Update. D. Lynn For BNL/Yale, Stave-09 Meeting, Oct 22 nd , 2010 . LBNL Mech Meeting September 2010. Tim Jones provide good summary in previous stave-09 meeting, so just a few more notes Foam-pipe interface

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D. Lynn For BNL/Yale, Stave-09 Meeting, Oct 22 nd , 2010

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  1. BNL Yale Mechanical Update D. Lynn For BNL/Yale, Stave-09 Meeting, Oct 22nd, 2010

  2. LBNL Mech Meeting September 2010 Tim Jones provide good summary in previous stave-09 meeting, so just a few more notes Foam-pipe interface Concern by pixel people is that simulation still shows there are problems when tests do not. Very extensive and detailed FEA by Bill Miller Agreed that BNL will pursue compliant adhesive, or no-adhesive approach But will also help with foam measurements for pixel, but won’t start til early next year UK to pursue rigid approach, may help with FEA also. Co-curing LBNL showed nice co-cured facing, but it is twisted. They have made “staves” out of them, but only with homogenous core LBNL will make co-cured facings for BNL/Yale and we will make complete stave. Question is whether to await final bus first, and go with the bus being used now. Depends on when stave-09 is needed! Depends on DC-DC???

  3. BNL Yale Current Activities Yale Making brackets out of aluminum for 1.3 stave Finishing new tooling and will shortly begin making another stavelet core Working on ability to measure foam properties on Instronmachinge Simulation work with known flow rate problem with Instron BNL Finished (with Yale) 1.3 meter stave (in August) Testing/characterization just beginning now Finishing simulation work on 35 cm thermo-mechanical stave Working on lightweight frame for stave (see later slide) Expect Foam-pipe interface work to begin in January

  4. Mass and Radiation Length of Stave I Gil’s Estimate July 08 Expect RL = .64% with new ss tubes Expect mass of pipe to reduce by factor of 2 next stave (10 mil walls rather than 20 mil) Expect mass of CF tubes to reduce by factor of 3 next stave Custom tubes had 1.03-1.09 mm walls after sanding New custom tubes have .30-.38 mm walls after sanding (.46-.58 mm one end before sanding, .58-.63 mm other)

  5. Comparison of stave and UK normalized stavelet mass UK chart from “The Design, Contstruction and Testing of a UK Stavelet”, Peter Cooke, Tim Jones, and Peter Sutcliffe Result is that both builds are comparable (and consistent with earlier LBNL estimate)

  6. Facing Width Concerns Relating to Gluing, Grinding, Support (leaves little room for glue on outer side)

  7. Gluing of CF tubes to First facing

  8. Glue Joints Apply hysol only to inside: many tests done to get epoxy to bleed to outside without overflow Outside Inside

  9. 2nd Facing attachment

  10. Finished Stave Looks very good 2nd glue joint looks very good Appears straight Facing remains flat Detailed characterization to follow Side 1 Side 2

  11. US Style Frame

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