TEC Mechanics and Integration

1. TEC Mechanicsand Integration 25. 1. 2005 Lutz Feld, RWTH Aachen

2. 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

3. Lutz Feld, RWTH Aachen

4. Overview DAQ test Lutz Feld, RWTH Aachen

5. DAQ test note that some months are suppressed for the purpose of this table integration of 2 sectors in parallel Lutz Feld, RWTH Aachen

6. 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

7. 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

8. 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

9. Reception of TEC Structure • TEC structure is receivedin its transport and rotation cradle Lutz Feld, RWTH Aachen

10. 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

11. 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

12. 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

13. 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

14. TEC Integration Work Plan Lutz Feld, RWTH Aachen

15. 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

16. Hardware for TEC Sector Test • nothing in hand today+ cooling unit (to be delivered soon) + interlock system (July 05 ?) Lutz Feld, RWTH Aachen

17. 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

18. 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

19. 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