cms tracker status report dimitri pandoulascms week 03.12.01 1

CMS TRACKER STATUS REPORT

Dimitri Pandoulas CMS Week 03.12.01 1

Pixel Workshop held at CERN , Nov. 30 ‘01

Conclusions on the Layout of the Pixel System (PRELIM) :

•For 2 pixel hits, physics potential depends only slightly on pixel layout

•For 3 pixel hits: Important CPU reduction on trigger level in finding track segments

•3 pixel hits imply three Barrel layers

•Differences for two or three forward disks < 10%

Two configurations relevant: B2D1 and B3D2Dimitri Pandoulas CMS Week 03.12.01 1A

The CMS Tracker

5.4 m

Outer Barrel –TOB-

Inner Barrel –TIB-

End cap –TEC-Pixel

2,4

m

volume 24.4 m3

running temperature – 10 0Cdry atmosphere for YEARS!

Inner Disks –TID-


APV Links “FEDs” Total

TOB

kCHF

2160 1080 14

- 22 - 108 - 245 - 375

TEC

kCHF

2880 1440 48(32,16)

+ 29 + 144 + 840 + 1013

Layout Modification Total Cost

Minimal cost of the difference 78 kCHF… but 16 “FEDs” not considered a Minimal cost of the difference 78 kCHF… but 16 “FEDs” not considered a viable solutionviable solution


Silicon Strip Modules

Sensors• Preseries (for Milestone 200) in hand and qualified • Contract with Hamamatsu signed• Contract with ST to be signed shortly (some technical details finalized)

• “Express Line” TOB modules (for system test) built and qualified in test beam

• First TEC modules built

Module components for M200(Sensors, frames, Pitch Adapters, Kapton strips) : readyFE Hybrids : available shortly


Express Line :20 (TOB) hybrids assembled Design of hybrid qualified

• Prototypes:– Two companies selected

• Dorazil, Berlin(D) for TOB/TEC • Mipot, Cormons (I) for TIB/TID

– Problems in substrate production due to required small feature size (120 m) of layout.

– Delivery now Dec 2001 / Jan 2002

Industrial Production (for 200 modules: M200)

Dorazil (TOB / TEC)– All 150 substrates produced. Samples inspected by us: excellent quality!– 5 assembled hybrids shipped on 30.11.01– If ok, remaining 150 expected before 15.12.01

• Preliminary Conclusion by Dorazil:– The present high density layout with very small features (120m) is not suited for

reliable and cost effective mass production!– Modifications proposed!

FE-Hybrids


– Long time needed to arrive at a working procedure

– First 10 substrates have been produced in w47 (Nov. 19)

– Will be sent to Strasbourg for inspection in w48 (Nov.26)

– If ok, 50 substrates will be produced

MIPOT (TIB)

FE-Hybrids (cont’d)

• Large-Scale Production:– Layout density needs to be revised

=> use packaged chips (design already available)

– Change of TIB geometry (significant!!!) => need new prototype

– Tendering in spring 2002


Ring 1-4: 2764 modules Ring 5-7: 4277 modules

FE779 carbon

FE779 carbon

K800 CFC

CTE (ppm/K) (W/mK)

CFC 0.5 In plane: 200-300, plane: 1

FE779 carbon 7.4 65

Hybrid 6.5

Si 4.7 84

TECFrames


Ring 1-4 TEC Frames: Deformations

An identical module was made with a FE779 frame

Setup to measure deformations by observing the reflection of a grid off the test object with a CCD camera


CFC K800 FE779 carbon

Temperatures

TECFrames


T = 30

TEC FRAMES

Rings 1-4: One piece frames in FE779 carbon

Rings 5-7: Hybrid support in FE779 carbon

Support Legs in CFC (K800)

TEC FRAMES FE779 carbon K800 CFC

Costs for 2764 Ring 1-4 frames: 132 kCHF 268 kCHF

Costs for 4277 Ring 5-7 frames: 341 kCHF 641 kCHF

Total costs for all TEC frames: 473 kCHF 882 kCHF


First TEC Module ARC System Readout


Test of first TEC Module

Module thermally cycled 20X from +20° to -20°

No changes

No new dead strips



Optoelectronics

Analogue optohybrids

Digital (control link) Optohybrid

•Operation: 80Mb/s

•First link successfully integrated into Tracker system test environment

•Provides key element of Tracker Control system

(see Jan Troska’s talk Thursday)

Tracker System Test Analogue and Digital Links

successfully integrated into Tracker System Test Bench

System measurements starting Will scale up to TOB ROD

PC with FED/FECDetector Module/AOH

Digital Control – DOH & TRxAnalogue Rx

500

400

300

200

100

0

AD

C C

ou

nts

6.05.04.03.02.01.00.0Time (s)

Example Dataframes after digitisation


Detectors mounted on CF half-shells

After design validation TIB After design validation TIB is ready to procure the is ready to procure the mechanical structure mechanical structure starting from the molds to starting from the molds to produce the shellsproduce the shells

Upper shell mold

TIB Mechanics


• Pointing• Good r-phi overlap• Uses same sensors as TEC Rings 1-3• Non hermetic (each disk is about 5% inefficient;)

• TID Layout #2 (Sept. ‘01)

Impact on the performance under study

For hermeticity:

Larger Ring 1 Sensor

R in : - 3.7mm

R out : +21.9mm

H : +23.4mm

New Mask Needed(+120 kCHF)

To be decided this

week

TID mechanics fully compatible with new sensor dimensions


The channel density in layers 1 and 2 has been reducedPitch on r- detectors increased from 122 to 183 m

The grouping of cooling, controls and readouthas been re-optimized and frozen

Detailed study of the service arrangementhas now started

TOB


Three rod frames assembled during the summerPrototypes of the final design

TOB

20

Validate design Tune design details Verify/optimize integration of components Commission production chain

InterConnect Bus

InterConnect Cards

Module support blocks

Module frameCooling pipe

Patch panel

Purpose:

The geometry has been verified for the three prototypes r.m.s. m for the position of the mechanical elements

TOB1) Now in Helsinki for the

commissioning of the production centre

2) Used for mechanical/thermal tests

neutron irradiation equivalent to LHC years several thermal cycles down to almost ºCtests of thermal performance with dummy modules + heat loads

3) Used for integration exercises and now ready for the “system test”

No problem has been found in the designThe call for tender for the CF parts has been sent out


TEC Structure modified after the EDRTEC Structure modified after the EDR

Facilitate cable Facilitate cable bendingbending

Periscopes for Periscopes for alignmentalignment

TEC services go to the TEC services go to the patch panel on the patch panel on the bulkhead, to avoid thebulkhead, to avoid theexertion of forces on exertion of forces on the endcap properthe endcap proper

Back plate split into Back plate split into two parts two parts

TEC Wheel with holes

Ready to order overall TEC structure: wheels + connecting elements


Cooling Path in Honeycomb Cooling Path in Honeycomb

TEC petal coolingTEC petal cooling

Titanium cooling pipes

and heat collectors

during insertion in

carbon fiber honeycomb

After Gluing CF Skin


Cooling plant for 3 petals Cooling plant for 3 petals operational in Louvainoperational in Louvain

Setup to measure PetalDeformation after Cooldown

TEC petal coolingTEC petal cooling


Project progressing well

• Procurement of mechanical structures underway

• Module Production imminent (starting with M200)

Project is on budget•Main concern: the availability of funds (7.4 MCHF missing Main concern: the availability of funds (7.4 MCHF missing and 1.9 MCHF not yet accorded) and 1.9 MCHF not yet accorded)

•No contingency for placing the remaining contracts No contingency for placing the remaining contracts for module production for module production

Present schedule aggressive (Tracker in CMS by spring 2006)

• Less risks on a more relaxed schedule


PIX main feed-through (to be molded in place)

TEC main feed-through (to be molded in lab)

TEC MSC connectors

PIX pipe connectors

PIX MSC and OF connectors

TEC connectors coverings

PIX connectors covering

Bulkhead main structure

10 mm thick insulation rohacell panels (internal and external)

Fixation to the TST (8 places)

Re-enforcement ring + humidity barrier

The Bulkhead region

New Bulkhead design

Dimitri Pandoulas CMS Week 03.12.01 A

Prototype Work on TEC structure

Detail of disk fixationDetail of disk fixation

Portion of disk with petal mountingPortion of disk with petal mounting

Dimitri Pandoulas CMS Week 03.12.01 B

Costs for 2764 Ring 1-4 frames

FE779 carbon blocks 3* 6 kCHF 18 kCHFCutting into sheets 3*11 kCHF 33 kCHFtools 20 kCHFlaser cutting 2764*15 CHF 42 kCHFParylene coating 2764* 7 CHF 19 kCHFSum 132 kCHF

Costs for 4277 Ring 5-7 frames

FE779 carbon blocks 1* 6 kCHF 6 kCHFCutting into sheets 1*11 kCHF 11 kCHFlaser cutting 4277*7 CHF 30 kCHFK800 CFC prepreg 0.48*330 kCHF 158 kCHFAutoclaving 0.48*131 kCHF 63 kCHFWater jet cutting 0.48* 57 kCHF 27 kCHFAssembly 16 kCHFParylene coating 4277*7 CHF 30 kCHFSum 341 kCHF

Dimitri Pandoulas CMS Week 03.12.01 C

Dimitri Pandoulas CMS Week 03.12.01 D

cms tracker status report dimitri pandoulascms week 03.12.01 1

Documents

b3d2dimitri pandoulascms

pixel hits

tob hybrids

tec modules

pixel layoutfor

pixel workshop

layout density

assembled hybrids