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Agenda/Topics

Agenda/Topics. 1) IHEP pre-series 2) Bias Contact 3) Straight Split . 4) Design variations and improvements 5) QA 6) Production plans: thermal dummies, module-0, alternatives 7) Mailing lists, WWW page 8) AOB. Production Status. In work: shipped early December, now at MPI

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Agenda/Topics

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  1. Agenda/Topics 1) IHEP pre-series 2) Bias Contact 3) Straight Split. 4) Design variations and improvements 5) QA 6) Production plans: thermal dummies, module-0, alternatives 7) Mailing lists, WWW page 8) AOB H.-G. Moser MPI, Munich

  2. Production Status In work: shipped early December, now at MPI One destroyed trying to make a straight split 4 damaged when bias contact added H.-G. Moser MPI, Munich

  3. Thickness Survey H.-G. Moser MPI, Munich

  4. Design Variations 1 baseline 2 IHEP proposal 3 simple butt joint 4 Geneva I (step) 5 Geneva II (cutt out) 6 Geneva II (mod) H.-G. Moser MPI, Munich

  5. Type load to break 1) Simple butt joint 30 g 2) Stepped joint 28 g 3) Inserted butt joint 66 g 4) Baseline profile ---- (TPG disrupted before..) Tests of AlN/TPG joints 1 2 3 4 H.-G. Moser MPI, Munich

  6. Option DT at Q0=240 W/m2 (K) Runaway (W/m²) 1) All AlN - 380 2) Lower wing Al2O3 0 380 3) Centre wing Al2O3 0 380 4) Upper wing Al2O3 0.5 380 5) All Al2O3 1.0 330 FEA Results Lower wing = scnd cooling contact Upper wing = main cooling contact H.-G. Moser MPI, Munich

  7. Design 1) Baseline 2) IHEP 3) Butt joints 4) Gnva I 5) Gnva II 6) 5, mod Costs(+:cheaper) -- + +(+) + + + Fragility of wings + + -- -- 0(+) 0(+) TPG machining 0 0 0 -- 0 0 AlN machining -- 0 + 0 0(+) 0(+) AlN replacement -- + + + + + Fragility of TPG 0 0 + + + Stability contact + 0 --(0) --(0) --(0) 0 Thermal properties 0 0 + + + 0 Evaluation Preliminary + H.-G. Moser MPI, Munich

  8. Material Variations There are probably good reasons to keep AlN for the cooling contacts. In all designs except 1) these are small plates of uniform thickness, not so expensive For the wings more variations are possible: AlN of lower conductivity (120 W/mK, 160 W/mK): This variation is cheaper and easier to machine. Has a fairly high thermal conductivity and good CTE match. Al2O3: raw material is cheaper than AlN. Machining is not much different from AlN, worse CTE mismatch and rather low thermal conductivity. Quartz/glasses: Probably likeAl2O3, low thermal conductivity (Borofloat !) FR4, glass fibre reinforced peekor similar materials: These materials are probably very cheap and easy to machine. The thermal conductivity is bad, CTE mismatch rather large. CFK (carbon fibre)Remark: I would avoid electrically conductive material…. H.-G. Moser MPI, Munich

  9. Costs H.-G. Moser MPI, Munich

  10. AlN Set costs Including taxes and transport: 25 US$/set H.-G. Moser MPI, Munich

  11. AlN Profiling Costs Firm quote from Fraunhofer Institut für Industriekeramik, Dresden H.-G. Moser MPI, Munich

  12. AlN Laser Cutting Quote from All Lasetechnik, München (for > 2000 pieces) H.-G. Moser MPI, Munich

  13. AlN Price Assuming 2.5 sets/sheet (conservative for outer): 16 US$/set H.-G. Moser MPI, Munich

  14. CTE mismatch • Best match to Si: • AlN • Borofloat H.-G. Moser MPI, Munich

  15. Distribution (?) H.-G. Moser MPI, Munich

  16. MoU Contributions 1070 H.-G. Moser MPI, Munich

  17. IHEP/NIITAP H.-G. Moser MPI, Munich

  18. Geneva H.-G. Moser MPI, Munich

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