IC design Tools and Synthesis J. Christiansen, CERN - EP/MIC [email protected].
Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Tracker Support Tube...
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Transcript of Tracker Support Tube Tracker EDR November 15th/16th 2000 M.Oriunno CERN/EP Tracker Support Tube...
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Tracker Support Tube
Marco Oriunno
CERN/EP Division
on behalf of
Tracker Integration GroupH.Breuker, M.Oriunno, P.Petagna, H.Postema
CMS Tracker EDR
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Silicon Strip Tracker:
Tracker Support Tube
L ~ 5,4 meters
Outer Barrel
Inner Barrel
Endcap
Pixel
~ 2
,4 m
eter
s
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Outline
Main FeaturesMain FeaturesRequirements and materialsRequirements and materialsCalculationsCalculationsManufacturing StudyManufacturing StudyTechnical SpecificationsTechnical Specifications
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
•CF/Nomex Sandwich Shell, 30mm thick
•CF/ Rails filled with glass wool
•Glass/Epoxy profiles supporting the services and the Thermal screen
TST Features
Rails
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Requirements and Materials
• High radiation transparency i.e. low mass density
•High Stiffness E i.e. E/
• High position stability in the time i.e. low CTE and CME
•Radiation Hardness
HS:T300/Epoxy
HM:M40J/Cyanate
UHM:M55J/Epoxy
Kg/m3) 1550 1700 1800Ex
GPa)
Ey Gpa)
Gxy Gpa)
xy
12585
0.3
23174
0.3
3476.55
0.3
KxW/moK)
KyW/moK)
40.7
501.5
602
x10-6 oK)
y10-6 oK)
-0.4530
-0.535
-0.530
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
•For lightweight structures, as the Tracker, a sandwich shell cylinder is the best compromise between weight and stiffness.
•The limited space available for the structure, makes definitively sandwich construction the best choice.
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Finite Element calculations
Component Weight (Kg)
Outer Barrel 620Inner Barrel +Pixel 150
Silicon Barrels services 180Silicon Endcap (x2) 680
Silicon Endcaps services 400Beam Pipe 10
Thermal Shield 50TST 200
Total 2290
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Laminate engineering constants and expansion coefficients
Laminate : T300_isotropicModified : Tue Aug 04 17:17:22 1998
Lay-up : ((0a/+45a/-45a/90a)2)SE
Plya T300;914;UD-.125/1580/61.5
Moduli (GPa )In-plane FlexuralE_x = 53.10 E f_x = 70.13E_y = 53.10 E f_y = 36.96G_xy = 20.19 G f_xy = 19.21
Poisson's ratiosnu_xy = 0.315 nu_yx = 0.315
Thermal expansion coefficientsIn-plane Curvat.
e-6/°C (1/m)/°Calpha_x = 2.57 delta_x = 0alpha_y = 2.57 delta_y = 0alpha_xy = 0 delta_xy = 0
Moisture expansion coefficientsIn-plane Curvat.
e-2/w% (1/m)/w%beta_x = 0.0358 phi_x = 0beta_y = 0.0358 phi_y = 0beta_xy = 0 phi_xy = 0
Laminate E and G
x-direction -->
E G
GPa
GPa
60
40
20
0
20
40
60
60 40 20 0 20 40 60
Laminate : T300_isotropicModified : Tue Aug 04 17:17:22 1998
Lay-up : ((0a/+45a/-45a/90a)2)SE
Plya T300;914;UD-.125/1580/61.5
Skin Material Properties T300/Epoxy
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
FEA Results
Load Condition Max. verticaldisplacement (mm)
Silicon Barrels (Inner+Outer) 0.235Silicon Endcap and Services 0.196TST weight, Thermal Shieldand Services
0.158
Total 0.589
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Seismic calculations:
0.15g horizontal load
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Static and Seismic Animations
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
0
0,5
1
1,5
2
2,5
3
3,5
4
0,5 1 1,5 2
T300,h=20
T300,h=25
T300,h=30
M40J,h20
M40J,h25
M40J,h30
skin (mm)
Dis
p (
mm
)
Materials and Geometry Effects
}T300
}M40J
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Manufacturing
•Composite Structures can be manufactured following different processes, achieving the same results:
–Vacuum Moulding –Autoclave–Filament Winding
•The crucial item in the definition of manufacture costs is the tooling design
•The cost of raw material is only 20% of the total cost
•High performance materials affect the total costs in terms of complicated curing procedure
•For high performance materials, the quality of the final product depends strongly on the experience of the manufacturer
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Manufacturing Study I
•The conventional way to manufacture sandwiches is the mould process with curing in an autoclave, using moulds made of carbon fibres reducing the thermal mismatch between the moulds and the sandwich during the cure, if the final tolerance on the dimensions is tight.
•Processes like filament winding require relatively simple tooling, allowing the production of the entire cylinder in one go
•Filament winding is widely used for manufacturing of medium size fuselages in the aeronautical industry where the size of the series pays off the manufacturing cost of the tooling: this is not the case for the TST where only one piece has to be made
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Manufacturing Study II
Medium-size companies, having experience on same size structures have been contacted to produce a preliminary study on the technological feasibility. The proposed solution are very similar:
•Composite Optic Industries (USA)
•Plyform (Italy)
•Composite Tooling and Structure (UK)
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
CMSSiliconTracker
TECHNICAL SPECIFICATIONTRACKER SUPPORT TUBE
IT-2434C/REV/EP/CMS Responsible Status: Draft Date: October 11, 2001 Page: 1 of 11
TECHNICAL SPECIFICATIONFOR THE
CMS TRACKER SUPPORT TUBE
(IT-2434C/REV/EP/CMS)
AbstractThis document defines the specifications for manufacturing the Tracker Support Tubefor the CMS Silicon Tracker. The Tube is a low-mass structure with a diameter of 2.4meters, a length of 5.4 metres, made of carbon fibre and Nomex sandwich. Auxiliarysystems, for the installation of the sub detectors and the support of services, beingrelevant part of the Tracker Support Tube assembly, have been included in thisspecification.
Tracker EDR November 15th/16th 2000
M.Oriunno CERN/EPTracker Support Tube
Technical Specifications’ Index
1 INTRODUCTION
2 SCOPE OF THE TENDER
3 GENERAL CONDITIONS FOR TENDERING AND CONTRACTING
4 OVERALL DESCRIPTION
5 DETAILED DESCRIPTION
6 DOCUMENTS
7 QUALITY CONTROL AND TESTS
8 PACKING, TRANSPORT AND DELIVERY
Part II QUALIFICATION CRITERIA
Part III TECHNICAL QUESTIONNAIRE