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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