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STRAW sector prototype plans approved solutions Dubna straws:

STRAW sector prototype plans approved solutions Dubna straws: new straw end pieces: D=11.2 mm and D=10.7 mm straws support tape items for discussion Presented by S.Movchan. Plans. Set of prototype drawing April/May

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STRAW sector prototype plans approved solutions Dubna straws:

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  1. STRAW sector prototype • plans • approved solutions • Dubna straws: • new straw end pieces: D=11.2 mm and D=10.7 mm • straws support tape • items for discussion • Presented by S.Movchan S.Movchan Straw status

  2. Plans • Set of prototype drawing April/May • Sector prototype production May • 40 straw prod. at Dubna and delivery to CERN June • 32 CERN straws assembly June • 32 Dubna straws assembly July • Vacuum test July-August • Anode wire crimping and tension measurement August • WEBs and 4 gas manifolds assembly August • Front-end integration September • Prototype install., consol adjustment, survey end of September • DAQ, grounding, front-end noise optimization October • Start up 12 October • Beam test start 17 October S.Movchan Straw status

  3. Approved solutions (after discussions): • Final geometry of single straw view (gap between neighboring straw • rows (h=1 mm) for straws support) Slava checked - OK! • Flange thickness: h=30 mm instead h=25 mm OK! • Model of Photon Veto tank -> see EDMS OK! • WEB final design (drawing) -> see EDMS OK! S.Movchan Straw status

  4. NEW flange thickness h=30 mm instead h=25 mm S.Movchan Straw status

  5. NEW prototype length: L=2260 mm instead L=2250 mm Free flange - Console!!! Fixed flange S.Movchan Straw status

  6. Dubna option (straw glue like into CREAM) S.Movchan Straw status

  7. NEW Dubna end pieces from aluminum Grooves: 1-st – GND 2-nd – GND safety against glue 3-d – for mylar glue 4-th – for end piece glue D=10.7 mm End piece glue accuracy +/- 15 µm D=11.2 mm S.Movchan Straw status

  8. Straw + WEB + anode pin Design based on CERN WEB End plug – NEW Anode pin - NEW (Dinternal ~ 1 mm) S.Movchan Straw status

  9. Anode wires positioning independent from straws • Precision: +/- 10 µm • Tools: • comb • 2x4 reference holes • on each flange S.Movchan Straw status

  10. NEW: straws support tape S.Movchan Straw status

  11. NEW: straws support tape S.Movchan Straw status

  12. Levan holes size: Big flange 13.00 - 0.07 mm and 10.90 + 0.08 mm Small flange 12.80 - 0.07 mm and 10.80 + 0.08 mm 8 Levan straws Rest 24 straws - like “CREAM” Slava holes size: Big flange 11.20 + 0.01 mm Small flange 10.70 + 0.01 mm S.Movchan Straw status

  13. New items for discussion: • Small flange: size between seal groves + 1 mm ? compare • with big flange • Gas manifold:gaps is 0.7 mm and 0.46 mm. What is guaranty that • straw end piece not must be cut? • For that is 3 holes M8 on each flange - ? • For that is 4 holes D=8H7 mm on each flange perimeter - ? • WEB on small flange is needed too • Design 3 new encloses for protection assembled straws from damage • Model of each gas manifold cells is needed (assembly procedure, • cell fixation to flange, WEB fixation, gas inlets and outlets, • pressure sensor and safety valve, …) • Sector prototype straw geometry alignment and check (modern method • and devises) • Prototype consol adjustment • Prototype survey S.Movchan Straw status

  14. Small flange Why this size + 1 mm compare with big flange? S.Movchan Straw status

  15. Gas manifold: Gaps are 0.7 mm and 0.46 mm That is guaranty that straw end piece not must be cut S.Movchan Straw status

  16. For what 3 holes M8 on each flange are ??? S.Movchan Straw status

  17. For what 4 holes D=8H7 mm on each flange are ??? S.Movchan Straw status

  18. for discussion We need WEB on this side too (for straw termination option) S.Movchan Straw status

  19. for discussion • Slava propose design 3 new encloses for • protection assembled straws from damage: • between bars • box for big flange (straw end pieces) • box for small flange (straw end pieces) • For this full set of sector prototype drawings is needed S.Movchan Straw status

  20. Sector prototype alignment Dubna conception based on glasses with cross: no enough place on flanges New method and equipment is needed (ask CERN survey group) S.Movchan Straw status

  21. Prototype consol adjustment Design is needed S.Movchan Straw status

  22. Prototype survey • CERN survey group: • prototype reference holes • reflectors • photo camera S.Movchan Straw status

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