M. Gilchriese SLHC Pixel Local Supports Based on Thermally Conducting Carbon Foam E. Anderssen, M. Cepeda, S. Dardin, M. Garcia-Sciveres, M. Gilchriese, N. Hartman and R. Post LBNL W. Miller and W. Miller iTi Henry Lubatti, Gordon Watts, Tianchi Zhao, Dept. of Physics Colin Daly, Bill Kuykendall, Dept. of Mech. Engr. University of Washington May 29, 2008 CERN
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M. Gilchriese SLHC Pixel Local Supports Based on Thermally Conducting Carbon Foam E. Anderssen, M. Cepeda, S. Dardin, M. Garcia-Sciveres, M. Gilchriese,
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M. Gilchriese
SLHC Pixel Local Supports Based on Thermally Conducting Carbon Foam
E. Anderssen, M. Cepeda, S. Dardin, M. Garcia-Sciveres, M. Gilchriese, N. Hartman and R. PostLBNL
W. Miller and W. MilleriTi
Henry Lubatti, Gordon Watts, Tianchi Zhao, Dept. of Physics
Colin Daly, Bill Kuykendall, Dept. of Mech. Engr.
University of Washington
May 29, 2008CERN
M. Gilchriese
Outline
• Concepts
• Examples of implementation
• Prototype fabrication and tests
• Foam materials testing
• Mechanical and thermal modeling
• Foam development plans
• Design optimization plans
• Prototype fabrication plans
• Conclusions2
M. Gilchriese
Concept Overview• Thermally conducting, low-density carbon foam as
– Structural material and simultaneously
– For conduction of heat to cooling tube(s)
• Same concept for barrel and disk local supports
• Implementation can differ for inner barrel elements, outer barrel elements and disks but keep basic concept same
3
Foam
M. Gilchriese
Outer Layers - Example• “Large” area planar sensors. Conservative module design (similar to current)
4
…
34.8 26.8
Module on back
986mm
38.4
CARBON FOAM
M. Gilchriese
Inner Layers - Examples• Monolithic structures
– R 4 cm only
– Modules one side
– Modules alternate sides
• Single-sided staves– R 4 cm
– R 10 cm
• Single-chip modules(e.g. 3D)
5 Potential cable location
M. Gilchriese
Disks• Layout with radial and overlap in progress – not trivial
• Modules on both sides of structure as now
• Radial overlap requires offset in Z
6
Back modules
Front modules
Module offsetin Z
M. Gilchriese7 VG VG 77
1st Pixel Prototype “Stave”
Tube with CGL7018
YSH-70 and K13D2U glued to foam
Tube in foam with CGL7018
Allcomp 1 foam
M. Gilchriese8 VG VG 88
LBNL Thermal Test Set-Up
Silicon heater
M. Gilchriese
Thermal Results
9
0
2
4
6
8
10
12
14
16
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70
P/A(W/cm^2)
De
lta
T a
ve
rag
e
YSH-70 only
K13D2U only
YSH-70 sideHeat both
K13D2U sideHeat both
T does not depend strongly on facing thickness
Note double - side heat not 2 x single – side heating