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TEC Mechanics and Integration. 25. 1. 2005 Lutz Feld, RWTH Aachen. 1 TEC = 8 sectors = 16 towers. 1 sector = 2 towers = 9 front petals +9 back petals = 9 control loops = 4 cooling loops. 1 tower = 9 front petals or 9 back petals = 2 cooling loops. Overview. DAQ test.

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Tec mechanics and integration

TEC Mechanicsand Integration

25. 1. 2005

Lutz Feld, RWTH Aachen

1 tec 8 sectors 16 towers
1 TEC = 8 sectors = 16 towers

1 sector

= 2 towers

= 9 front petals

+9 back petals

= 9 control loops

= 4 cooling loops

1 tower

= 9 front petals

or 9 back petals

= 2 cooling loops

Lutz Feld, RWTH Aachen


DAQ test

Lutz Feld, RWTH Aachen

DAQ test

note that some months are suppressed for the purpose of this table

integration of 2 sectors

in parallel

Lutz Feld, RWTH Aachen

Tec integration
TEC Integration

  • team:

    • Aachen Ib: Richard Brauer, Berthold Debye, Lutz Feld, Waclaw Karpinski,Katja Klein, Martin Weber, Michael Wlochal + 3 technicians

    • Lyon: Gaelle Boudoul, Didier Contardo, Nick Lumb, Laurent Mirabito+ n technicians

  • documentation:

    • “Integration of the Tracker End-Caps of the CMS Silicon Strip Tracker”

    • written by Aachen Ib and Lyon

    • fairly advanced draft, will be made available after additions from Lyon are implemented

Lutz Feld, RWTH Aachen

Components of a tec before integration
Components of a TEC before integration

  • Nine disks, which will carry the petals

  • The front disk

  • The back disk, consisting itself of the disk 10 and the alignment ring

  • The bulk head

  • Alignment system components, in particular the 16 beam splitters that are located on disk 6, plus the optical

  • fibers attached to them

  • Eight service channels filled with optical fibres. These will be provided by Karlsruhe

  • 16 sets of cooling pipes (one per tower). Each set consists of four main pipes plus the connections to the petal manifolds, as well as the multi-service cables (MS cables) and control power cables necessary to power one tower of petals. Fully tested assemblies of cooling pipes with cables will be received from Lyon

  • 144 fiber connector holders screwed onto the disks

  • Grounding and shielding elements

  • The inner tube

  • The outer enclosure

  • The slide-in mechanics

Lutz Feld, RWTH Aachen

Components for tec integration
Components for TEC Integration

  • petals are integrated into TEC sector-by-sector PICs need to deliver petal types such that one sector can be filled after the other

Lutz Feld, RWTH Aachen

Reception of tec structure
Reception of TEC Structure

  • TEC structure is receivedin its transport and rotation cradle

Lutz Feld, RWTH Aachen

Petal reception
Petal reception

  • PICs deliver known good petals to TEC integration sites

    • first 18 petals to Lyon for DAQ test

    • then 144 petals to Aachen for TEC+

    • then 126 petals to CERN for TEC-

  • each petal will be inspected upon arrival at TEC integration site

  • a read-out test will check basic functionality

    • details in the document

    • this is NOT a full test like at the PICs

    • read-out electronics in hand, qualification of set-ups to be done

  • capacity of petal reception: 2 petals per day

  • storage capacity at TEC integration site for at least 40 petals

Lutz Feld, RWTH Aachen

Petal acceptance criteria
Petal Acceptance Criteria

  • criteria will be matched to petal quality criteria applied at PICs (which do not yet exist)

  • the decision whether a petal passes the acceptance will be based on the following criteria:

    • optical inspection

    • all optical fibers working (connectivity scan)

    • all chips (except DCU) accessible via I²C

    • all modules can be read out in all modes,all sensors (temperature, humidity) work properly

    • leakage current per high voltage channel must not exceed the respective value measured (under comparable circumstances) during the petal assembly by more than 20%.

    • mean per APV of the noise after common mode subtraction is required to be below a certain threshold

    • RMS per APV of the noise after common mode subtraction must be below a certain threshold

    • number of bad strips based on the noise below a threshold (to be decided)exchange module if number of bad strips >2% (?)

Lutz Feld, RWTH Aachen

Petal repair
Petal Repair

  • only 5-7 spare petals per type

  • need to attempt repair of any faulty petal

  • repair centers: Aachen IIIb and Lyon/CERN

  • rely on very good quality of petals from PICs

Lutz Feld, RWTH Aachen

Tec integration1
TEC Integration

  • sector by sector, starting at the 3 o’clock and 9 o’clock positions

  • integration and test of one sector takes 15 working days:

Lutz Feld, RWTH Aachen

Tec integration work plan
TEC Integration Work Plan

Lutz Feld, RWTH Aachen

Tec sector test
TEC Sector Test

1. Bare connectivity and cabling check: connectivity scan

2. Basic commissioning of the sector:

Timing alignment run

Adjustment of laser gain and bias settings

3. Pedestal runs:

10000 events in peak mode

10000 events in deconvolution mode

4. Data taking of cosmic events:

Commissioning of the particle trigger

100000 events per module in peak mode

100000 events per module in deconvolution mode

5. Laser alignment run

6. Cold test: TEC+ first sector in Aachen, full TEC+ and any sector in TEC- in Lyon cold room (at CERN )

Lutz Feld, RWTH Aachen

Hardware for tec sector test
Hardware for TEC Sector Test

  • nothing in hand today+ cooling unit (to be delivered soon)

    + interlock system (July 05 ?)

Lutz Feld, RWTH Aachen

Sector acceptance criteria
Sector Acceptance Criteria

  • all optical links working ok

  • all chips (except DCUs) accessible via I²C

  • all modules can be read out in all modes

  • no module has more than 5% (?) bad strips

  • stable HV operation up to 450V

Lutz Feld, RWTH Aachen

Tests before insertion into tk tube
Tests before insertion into TK tube

  • metrology check

    • optical survey by CERN metrology group

    • details to be defined

  • cold read-out test

    • using Lyon cold room

    • procedure and criteria (probably) very similar to sector test

Lutz Feld, RWTH Aachen

Main open issues
Main Open Issues

  • when can we expect the first production petals?

    • current planning assumes:

      • early petals for DAQ test in Lyon ASAP

      • first 18 production petals for TEC+ ready latest in June 05

  • petal logistics

    • transports

  • quality of petals

    • we need to achieve a very low repair rate at the TEC integration sites

  • delivery of read-out components and DCS for sector test

  • facilities at CERN (+manpower)

    • integration of TEC- at CERN needs to be prepared(including a PIC at CERN, at least for petal repair)

    • reception and test of TEC+

Lutz Feld, RWTH Aachen