Agenda/Topics

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
2
Production Status
Type Produced and shipped by IHEP At MPI Bias contact added In work
Outer 31 31 11 18
Middle 15 15 6 7
Inner 15 15 9 5
In work shipped early December, now at MPI One
destroyed trying to make a straight split 4
damaged when bias contact added
3
Thickness Survey
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)
5
Tests of AlN/TPG joints
1
2
3
4
6
FEA Results
Lower wing scnd cooling contact Upper wing
main cooling contact
7
Evaluation
Preliminary

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 like Al2O3, 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.
9
Costs
item outer middle inner total
number 30 15 15 60
TPG 20 19.7 25.1 1272
polish 14.1 13.9 17.8 899
profile 1.4 1.4 0.9 77
cutting 2.1 2.1 1.6 199
coating 2.8 2.8 2.8 168
AlN set 66 65 48 3675
Net price 106 105 96 6210
Packing, testing, transport, tax 27 27 27 1616
Total 133 134 123 7826
setup 24 24 24 1440
Incl. Setup 157 156 147 9266
10
AlN Set costs
Including taxes and transport 25 US/set
11
AlN Profiling Costs
Type number setup set Total/piece
outer 1171 2790 Euro 10.2 Euro 12.6 Euro
Middle 12 701 2790 Euro 10.2 Euro 14.2 Euro
Middle 6 100 7.0 Euro 7.0 Euro
inner 499 1860 Euro 7.0 Euro 10.7 Euro
Firm quote from Fraunhofer Institut für
Industriekeramik, Dresden
12
AlN Laser Cutting
Type Price/DM
outer 10.2
Middle 12 10.2
Middle 6 7.3
inner 7.3
Quote from All Lasetechnik, München (for gt 2000
pieces)
13
AlN Price
Sheet 10 pieces 20 pieces
114 x 114 x 0.225 mm3 155 DM 125 DM
114 x 114 x 0.5 mm3 120 DM 90 DM
Assuming 2.5 sets/sheet (conservative for outer)
16 US/set
14
CTE mismatch

• Best match to Si
• AlN
• Borofloat

15
Distribution (?)
Institute outer middle inner
UK 8 3 4
Valencia 4 4
MPI 8
Freiburg 6
NIKHEF 5
Geneva 6
Melbourne 5
sum 23 (7 left) 15 15
16
MoU Contributions
Institute share kSF
Australia 5 54
NIKHEF 5 54
Geneva 25 268
Germany 34 364
Spain 9 96
UK 27 289
1070
17
IHEP/NIITAP
18
Geneva