spine team meeting 23/01/2001H.-G. Moser MPI, Munich 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

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Production Status TypeProduced and shipped by IHEPAt MPI Bias contact added In work Outer Middle15 67 Inner15 95 In work: shipped early December, now at MPI One destroyed trying to make a straight split 4 damaged when bias contact added

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Thickness Survey

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Design Variations 1 baseline 2 IHEP proposal 3 simple butt joint 4 Geneva I (step) 5 Geneva II (cutt out) 6 Geneva II (mod)

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Tests of AlN/TPG joints Typeload to break 1) Simple butt joint30 g 2) Stepped joint28 g 3) Inserted butt joint66 g 4) Baseline profile---- (TPG disrupted before..)

spine team meeting 23/01/2001H.-G. Moser MPI, Munich FEA Results Option  T at Q0=240 W/m2 (K) Runaway (W/m²) 1) All AlN-380 2) Lower wing Al 2 O ) Centre wing Al 2 O ) Upper wing Al 2 O ) All Al 2 O Lower wing = scnd cooling contact Upper wing = main cooling contact

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Evaluation Design1) Baseline 2) IHEP3) Butt joints 4) Gnva I 5) Gnva II 6) 5, mod Costs(+:cheaper)--++(+)+++ Fragility of wings++-- 0(+) TPG machining AlN machining--0+00(+) AlN replacement Fragility of TPG00+++ Stability contact+0--(0) 0 Thermal properties Preliminary +

spine team meeting 23/01/2001H.-G. Moser MPI, Munich 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. Al 2 O 3 : raw material is cheaper than AlN. Machining is not much different from AlN, worse CTE mismatch and rather low thermal conductivity. Quartz/glasses: Probably like Al 2 O 3, low thermal conductivity (Borofloat !) FR4, glass fibre reinforced peek or 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….

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Costs itemoutermiddleinnertotal number TPG20 $19.7 $25.1 $1272 $ polish14.1 $13.9 $17.8 $899 $ profile1.4 $ 0.9 $77 $ cutting2.1 $ 1.6 $199 $ coating2.8 $ 168 $ AlN set66 $65 $48 $3675 $ Net price106 $105 $96 $6210 $ Packing, testing, transport, tax27$ 1616 $ Total133 $134 $123 $7826 $ setup24 $ 1440 $ Incl. Setup157 $156 $147 $9266 $

spine team meeting 23/01/2001H.-G. Moser MPI, Munich AlN Set costs Including taxes and transport: 25 US$/set

spine team meeting 23/01/2001H.-G. Moser MPI, Munich AlN Profiling Costs TypenumbersetupsetTotal/piece outer Euro10.2 Euro12.6 Euro Middle Euro10.2 Euro14.2 Euro Middle Euro inner Euro7.0 Euro10.7 Euro Firm quote from Fraunhofer Institut für Industriekeramik, Dresden

spine team meeting 23/01/2001H.-G. Moser MPI, Munich AlN Laser Cutting TypePrice/DM outer10.2 Middle Middle 67.3 inner7.3 Quote from All Lasetechnik, München (for > 2000 pieces)

spine team meeting 23/01/2001H.-G. Moser MPI, Munich AlN Price Sheet10 pieces20 pieces 114 x 114 x mm DM125 DM 114 x 114 x 0.5 mm DM90 DM Assuming 2.5 sets/sheet (conservative for outer): 16 US$/set

spine team meeting 23/01/2001H.-G. Moser MPI, Munich CTE mismatch Best match to Si: -AlN -Borofloat

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Distribution (?) Instituteoutermiddleinner UK834 Valencia44 MPI8 Freiburg6 NIKHEF5 Geneva6 Melbourne5 sum23 (7 left)15

spine team meeting 23/01/2001H.-G. Moser MPI, Munich MoU Contributions InstitutesharekSF Australia5%54 NIKHEF5%54 Geneva25%268 Germany34%364 Spain9%96 UK27%

spine team meeting 23/01/2001H.-G. Moser MPI, Munich IHEP/NIITAP

spine team meeting 23/01/2001H.-G. Moser MPI, Munich Geneva