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GR June 2000. The CMS Silicon Strip Tracker Project. Tracker PRR-01. Scope of the Track_PRR-01 (1). 1) Present the general scheme of the CMS Tracker, including the read out scheme, putting the silicon sensors in perspective.

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The cms silicon strip tracker project

GR June 2000

The CMS Silicon Strip Tracker Project

Tracker PRR-01


Scope of the track prr 01 1
Scope of the Track_PRR-01 (1)

1) Present the general scheme of the CMS Tracker, including the read out scheme, putting the silicon sensors in perspective.

2) Present in detail the silicon sensors and electronics modules for which approval is sought. The transition to the bulk procurement shall be particularly addressed.

3) Present the specifications and the manufacturing plan of the silicon

sensors including Quality Plan and Control procedures.

Scheduling, organization, integration and material safety questions related to the silicon sensor project shall be addressed.

GR TRAK_PRR-01 June 2000


Scope of the track prr 01 2
Scope of the Track_PRR-01(2)

Overview of the project

layout, organization and schedule: GR

mechanics and cooling : HP

readout scheme : GH

Silicon sensor:

definition and specification : MM

quality control & assurance : GMB

Detector :

module design : BG

FE Hybrid : JDB

FE electronics : GH

module assembly : EF

GR TRAK_PRR-01 June 2000


Goal of the track prr 01
Goal of the Track_PRR-01

Approve the procurement of sensors to equip 200 detectors of the SST of final design.

These detectors will be used to start up the production chain before the production.

They will be equipped with final FE electronics and will be used for system tests to validate the read-out chain before the massive procurement of the FE electronics.

GR TRAK_PRR-01 June 2000


Layout of the talk
Layout of the talk

  • Requirements and design considerations 3

  • Layout 4

  • Performance 5

  • Mechanical Structures 4

  • Collaboration and budget 4

  • Structure of the project 3

  • Organization of the project 4

  • Construction of detectors 4

  • Schedule 5

  • Conclusions 2

GR TRAK_PRR-01 June 2000


Requirements
Requirements

CMS Technical proposal

“The design goal of the central tracking system is to reconstruct isolated high pt tracks with an efficiency of better than 95% and high pt tracks within jets with an efficiency better than 90%..”

“The momentum resolution required for isolated charged leptons in the central rapidity region is

Dpt/pt = 0.1 pt (pt in TeV)..”

This momentum resolution allows to reconstruct

Z m+m- with Dmz < 2 GeV up to Pz ~ 500 GeV

GR TRAK_PRR-01 June 2000


Design considerations 1

F

SST

Design Considerations (1)

Twelve layers with digital (pitch/12) spatial resolution give a momentum resolution of

in the available radial space.

Occ = F x pitch x length

Low (1%) occupancy requires maximum strip length of 10cm at 20 cm radius.

This requirement is relaxed at the outer radii.

Primary charged particle densities integrating 20 minimum bias events

GR TRAK_PRR-01 June 2000


Design considerations 2
Design considerations (2)

  • Fast detector response (< 25 ns) to reduce pile-up effect

  • Capability to cope with the CMS trigger requirements

  • Resistance to high radiation dose

  • Minimize the amount of material before the calorimeters

GR TRAK_PRR-01 June 2000


Layout 1
Layout (1)

The CMS SST is made with silicon detectors of two different thickness: 320 mm in the inner region (r< 600 mm) and 500 mm in the outer region.

These are single side detectors made of one (thin) or two (thick) daisy-chained silicon sensors from 6” wafers.

They are read out with APV25 in deep sub-micron technology. There are 128 channels/APV.

Blue lines indicate “double” layers where two detectors are mounted back-to-back. The second detector is mounted with a stereo angle of 0.1.

GR TRAK_PRR-01 June 2000


Layout 2
Layout (2)

N of points in the SST: Total, double, double inner, double outer.

Strip length ranges from 10cm in the inner layers to 20 cm in the outer layers.

Pitch ranges from 80mm in the inner layers to 200mm in the outer layers

GR TRAK_PRR-01 June 2000


Layout 3
Layout (3)

Tracker Numbers

6,136 Thin wafers

19,632 Thick wafers

6,136 Thin detectors (1 sensor)

9,816 Thick detectors (2 sensors)

3112 + 1512 Thin modules (ss +ds)

4776 + 2520 Thick modules (ss +ds)

10,016,768 strips  electronics channels

78,256 APV chips

26,000,000 Bonds

470 m2 of silicon wafers

223 m2 of silicon sensors (175 m2 + 48 m2)

GR TRAK_PRR-01 June 2000


Layout 4
Layout (4)

IB1 and IB2 can also be made with 2 sensors from 4” wafer

GR TRAK_PRR-01 June 2000


Performance 1
Performance (1)

Radiation length of the SST as a function of rapidity.

Material outside the tracker volume not included

Present layout

Layout used in the full simulation

GR TRAK_PRR-01 June 2000


Performance 2
Performance(2)

Present Layout

Layout used in the full simulation

The present layout has one extra point in the region 1<<2

GR TRAK_PRR-01 June 2000


Performance 3
Performance (3)

Momentum resolution

10% at 1 Tev

MS up to 30 GeV

Sagitta at 1 TeV  180 mm

GR TRAK_PRR-01 June 2000


Performance 4
Performance (4)

Occupancy

GR TRAK_PRR-01 June 2000


Performance 5
Performance(5)

Efficiency

Efficiency(%) in jets:  < 0.7 1.2<<1.6

ghost fraction(%) pt>2 Gev/c

At least 6 reg.hits 93.7 +/- 0.6 91.6 +/- 0.6

0.26 +/- 0.09 0.10 +/- 0.07

At least 8 reg.hits 88.3 +/- 0.9 86.8 +/- 0.8

0.06 +/- 0.06 0.10+/-0.07

main loss due to interaction of particle in the tracker material

GR TRAK_PRR-01 June 2000


Outer barrel structure
Outer barrel structure

GR TRAK_PRR-01 June 2000


Inner barrel structure
Inner barrel structure

GR TRAK_PRR-01 June 2000


Forward endcap structure
Forward Endcap structure

GR TRAK_PRR-01 June 2000


Forward endcap structure1
Forward Endcap Structure

GR TRAK_PRR-01 June 2000


Status of the project
Status of the project

  • We have finished the R&D phase and we are now moving to the construction phase using all the experience gained in the last years:

  • The layout has been defined and frozen

  • The sensor specifications are ready and we are now preparing the Tender

  • The drawings of the masks are being prepared

  • The drawings of the detectors are being prepared

  • The FE electronics has been designed, prototypes have been successfully tested and we have submitted the last engineering run

  • The mechanical structures are being designed after the definition of the layout

GR TRAK_PRR-01 June 2000


The sst collaboration
THE SST Collaboration

* = C.E. Consortium

*

Vienna

*

Brussels UVB, Brussels ULB, Antwerpen, Louvain, Mons

Helsinki, Oulu

*

Mulhouse, Lyon, Strasbourg

*

Aachen I, Aachen III, Karlsruhe

Bari, Catania, Firenze, Padova, Perugia, Pisa, Torino

*

ETH Zurich

Brunel, Imperial College, Rutherford

Fermilab, Kansas, Purdue, Rochester, Northwestern

CERN

GR TRAK_PRR-01 June 2000


Sst cost 1
SST Cost (1)

Cost of the SST (deliverable): 69.1 MCHF including 10% contingency

(pixel detector excluded)

Revised by LHCC in May/00

Funds presently available 62.2 MCHF.

USA has a contribution of 2.5 M$ in labor.

GR TRAK_PRR-01 June 2000


Sst cost 2
SST cost (2)

More than 40% of the cost is in the modules.

About 75% of the cost of the modules is the cost of the sensors.

GR TRAK_PRR-01 June 2000



Edms structure of the tracker project
EDMS structure of the Tracker project

GR TRAK_PRR-01 June 2000


Example forward endcap pbs
Example: Forward Endcap PBS

GR TRAK_PRR-01 June 2000


Example forward endcap wbs
Example: Forward Endcap WBS

GR TRAK_PRR-01 June 2000


Organization 1
Organization (1)

  • Management

  • Tracker steering committee. Weekly meeting (VC) with minutes and action list

  • 4 Tracker weeks and 4 CMS weeks in the year with Plenary, Institution board, Finance Board meetings.

  • Technical

  • Tracker Project Office

  • Working groups on: Sensor, Gantry, Bonding, Frames, Hybrids, Test of detectors, Electronics system

GR TRAK_PRR-01 June 2000


Organization 2 tracker steering committee
Organization (2)Tracker steering committee

Rino Castaldi, Project Manager (chair)

Gigi Rolandi, deputy project manager

Ariella Cattai, Technical Coordinator

Marcello Mannelli, Resource manager

Geoff Hall, Electronics

Roland Horisberger, Pixel vertex detector

Demetrios Pandoulas, CE consortium

Jean Marie Brom, CE consortium

Ettore Focardi, INFN

Guido Tonelli, INFN

Joe Incandela, USA

Patrice Siegrist, Cern

GR TRAK_PRR-01 June 2000


Organization 3 tracker project office
Organization (3)Tracker Project Office

Technical Coordinator: P. Siegrist --> A. Cattai

Planning Officer H. J. Simonis

Safety officer M. Huhtinen

CDD EDMS coordinator P. Petagna

Tracker Engineer H. Postema

Subproject coordinators….

Still to be restructured after the redefinition of the Tracker Project in December 1999

GR TRAK_PRR-01 June 2000


Organization 4 working groups
Organization(4)Working groups

  • Sensor G.M. Bilei http://home.cern.ch/~angarano/sensors/main.html

  • Gantry G. Fiore

  • http://home.cern.ch/~fiore/gantry/gantry.html

  • Bonding A. Honma

  • http://honma.home.cern.ch/honma/BondingWG/bondhome.html

  • Frames C. Vandervelde

  • http://web.iihe.ac.be/frames/

  • Hybrids U. Goerlach

  • Test of detectors E. Focardi http://cmsdoc.cern.ch/~efocardi/moduletest/welcome.html

  • Electronics system G. Hall

  • http://pcvlsi5.cern.ch:80/CMSTControl/

  • http://www.cern.ch/CERN/Divisions/ECP/CME/OpticalLinks/

gantry

sensors

bonding

frame

hybrid

GR TRAK_PRR-01 June 2000


Construction of detectors 1
Construction of detectors (1)

We will construct 17,500 detectors (10% spares included) in 2.5 years.

This corresponds to an average capacity of

35 detectors/day

There are 6 centers with robot assembly and

12 centers with fast bonding machines

Assuming 6 detectors/h mounted on the robot and 2 detectors/h bonded we have a capacity

to mount 288 detectors/day

to bond 192 detectors/day

GR TRAK_PRR-01 June 2000


Construction of detectors 2 robot mounting
Construction of detectors(2) Robot mounting

Pilot Project (Cern):

Reproducibility 2 mm

Throughput:

8 modules/h

Working group responsibility to ensure common: hardware, calibration, methods

Bari : G. Fiore

Catania: C. Tuve’

Brussels: L.Van Lancker

Lyon: S. Tissot

Padova: A. Kaminsky

Perugia: M. Biasini

USA: L. Spiegel

GR TRAK_PRR-01 June 2000


Construction of detectors 3 bonding
Construction of detectors(3)Bonding

More than 14 bonding machines in the Institutes of the Collaboration. Available typically 80-100% for CMS Tracker during the production period with trained manpower.

Throughput already achieved in other projects between 5 and 25 detectors/day.

Working group responsibility to ensure common: methods and tests.

Aachen: Wolfgang Braunschweig

Bari: Paolo Tempesta

CERN: Alan Honma

Fermilab: Joel Goldstein

Florence: Enrico Scarlini

Karlruhe: Frank Roederer

Padova: Igor Stavitski

Pisa: Filippo Bosi

Strasbourg: Francois Didierjean

Torino: Barbara Pini

Vienna: Rudolf Wedenig

Zurich: Klaus Freudenreich

GR TRAK_PRR-01 June 2000


Construction of detectors 4 burn in of detectors
Construction of detectors(4)Burn in of detectors

Detectors are mounted on pre-cabled mechanical structures before burn in:

Outer barrel rods (300+388) with (12, 6) detectors Done in Fermilab

Petals (144 + 144) with (<=28 , <=23 ) detectors

50 petals each in: Aachen, Karlsruhe, Lyon, Strasbourg/Mouluse, Brussels/Antwerp, Louvain

The inner structures are smaller and then somewhat less modular:

Inner Endcap disks (6) with 136 detectors

Half shells (4+4+4+4) with ( 168, 228, 138, 168)

Done by INFN

GR TRAK_PRR-01 June 2000


Schedule 0 important dates
Schedule (0)Important dates

Full list of milestones (level 1-2-3) can be found at: http://cmsdoc.cern.ch/Tracker/managment/LHCC/Milestone_list.doc

PRR 15/6/00

Tender for sensors 3/7/00

EDR 20/11/00

Signature of sensor contract 15/2/01

Test of system aspects

with pre-production modules 15/3/01

Tender mechanical structures 15/1/01

First production module ready 30/9/01

First rod ready 21/1/02

First petal ready 15/4/02

Mechanical structures ready 16/9/02

Delivery of TIB to CERN for Final test 2/2/04

Delivery of End-Cap to CERN 27/2/04

Delivery of TOB to the Tracker 15/4/04

TRACKER DETECTOR INSTALLED 9/5/05

GR TRAK_PRR-01 June 2000


Schedule 1 tracker installation at cern
Schedule (1)Tracker installation at CERN

Compatible with CMS schedule v. 28

Tracker is lowered into the pit 16/12/2004

fw shift of this date is used as contingency

TOB commissioning ends by 15/4/04

TIB installed by June 2004

TIE installed by August 2004

TFE installed by October 2004

GR TRAK_PRR-01 June 2000


Schedule 2 detectors production
Schedule (2)Detectors production

Detector production must end by Q1 2004

Sensors delivery time is 2.5 years

Detector production must start in Q3 2001

GR TRAK_PRR-01 June 2000


Schedule 3 preparation of production
Schedule (3)Preparation of production

Can we start detector production in Q3 2001 ?

Tender for sensors 3/7/2000 - Draft already existing. Draft Technical specification existing.

Start delivery June 2001

Sensor testing centers (some already ready) all centers ready by 1/5/01

Gantry centers: commissioning 1st center 9/00

all centers ready by 15/3/01

Bonding centers (partially ready)

all centers ready by 4/6/01

FE Hybrids Production ceramic proto by 7/00

Final production starts 1/3/01

FE electronics

Components tested, System test on prototipes

done in 05/00.

Detectors+FE Hybrid+FE electronics

Need final system test foreseen in May/01 with

final design modules mounted on structures and

read out by final electronics

GR TRAK_PRR-01 June 2000


Schedule 4 procurement of fe electronics
Schedule(4)procurement of FE electronics

After 4 wafers production and evaluation in Q3/00

In Q4/00 we will submit a 50 wafers order (10% of total production) before the system tests.

This order will be sufficient for producing modules until Q4 2001 included.

GR TRAK_PRR-01 June 2000


Schedule 5 milestone 200
Schedule (5)Milestone 200

We foresee the procurement of sensors to equip 200 detectors (80 TOB, 40 TIB, 80 W6 of TFE).

These detectors will be ordered in July 2000 (procurement procedure already started)

Equipped with frames of the final design (procurement procedure already started)

Equipped with (ceramic) hybrids of the final design (design in preparation)

Equipped with ASICS of the final design (from the last engineering run already submitted)

These detectors can be used in the Tracker

GR TRAK_PRR-01 June 2000


Why to produce 200 detectors
Why to produce 200 detectors

  • Procure a sufficient number of detectors of the final design for the system tests before launching the big orders of electronics

  • Exercise the production procedure before the start of the production to identify and correct possible bottle-necks

  • Motivate the production and testing centers to an early preparation

  • 200 detectors are 1.3% of the total number of detectors. Their projected cost is about 1.3% of the cost of the whole tracker.

GR TRAK_PRR-01 June 2000


Conclusions
Conclusions

  • As you will also see from the following presentations:

  • We believe we have designed a robust detector for tracking at LHC

  • We have an aggressive plan for the production of 220 m2 of silicon detectors and we believe we can produce them in 2.5 years

  • We have to start very soon the procurement of 200 detectors for starting/validating the production line and for system tests.

  • We ask green light for this procurement

GR TRAK_PRR-01 June 2000


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