1. Optoelectronics internal report, 17 August 2007
Optical Multi-Ribbon Cables Protection
Part II
Daniel Ricci
(in collaboration with Karl Gill and Robert Grabit)
Web page:
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

2. Protection job: objectives
Uninstall all the cables at TIF (i.e. Tracker 25% test, Tracker sub-systems integration, Cosmic Rack);
Recuperate all the cables around (i.e. Pisa, other institutes/people, various buildings, etc...);
Protect/assign all cables for P5;
Protect all spares and classify them in order of priority;
Classify all broken ones and protect them on the good end;
Store everything ready for P5.
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

3. Protection job: logistics
Model replicated the previous one in Bld 216:
Carry on operations in a flexible way according to people/spaces available;
two benches for protection installed + one for cable inspection + OTDR station for dubious;
Mohsin was the SW responsible and supervised the cables flow;
Benjamin took in charge the box logistics (also for the future).
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

4. Protection job: final report
Job in the TIF lasted 4 weeks. People involved in place were from 2 to 8 (depending on availability).
Numbers below include the previous ones (see Part I)
L [m]
Protected 45 7 50
225 55 60
116 65 39
100
125
612
Total cables protected: 612
(564 assigned; 4 mechanical; 44 spares)
93% of the total
Unavailable cables: 31
(not compliant, broken, etc...)
4.7% of the total
Unavailable 45 11 50 6 55 7 60 4 65 1
100
125 2 31
Unavailable includes:
4 in Bld. 904
4 in Bld. 186
7 in Bld.14 including 4 reference (working) cables reserved by Francois
3 still loaned (2 Pisa 1 TOB)
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

5. Protection report : used cables (global)
Cables removed from TIF: 134
TEC cold room (TIF)
TIF (25% + integration)
Integration in Pisa (TIB)
TEC petals integration (Bld.186)
CRack
Total
Visual inspection 44
116 6 8 4
178
Light box
MPO inspection 18
OTDR 1 3 22
Total failures 2 12
1 has one fiber 1m from MPO;
1 has MFS pins broken;
1 missed a QR on R8 (replaced);
1 has edge of one MFS broken.
1 with complete delamination on MFS. Repaired with kapton.
1 with MFS connector broken.
4 non compliant.
2 with missing pin on MFS.
2 with missing pin on MFS.
1 with 3 fibres broken MPO side.
3 delaminated, repaired with kapton and classified as spare.
1 with broken ribbon at 16.75m from MFS;
1 with broken fiber at about 50cm of MFS;
1 with broken fiber on MFS edge;
1 with scratched MPO and other problems.
Frank at the visual inspection bench.
Arrived from Pisa: good.
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

6. Protection report: boxes
Used boxes: 204 (including CFF ones)
Boxes repaired: 2
Empty available: 0 (10 big cartons for emergency)
All the boxes were moved to Bld. 226 (also the 3 in Bld 904 and 2 in Bld. 14 will be moved).
All CMS sectors
Spares/broken
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

7. Protection report: Inventory
Inventory has been regularly updated and re-baselined at the end;
13 errors were found in the Inventory (due to duplicated/inverted QR codes) and corrected by special entries;
280 INB labels (50% of the used ones) were found unreadable during operations and even after reprinting;
A copy of the Inventory is in Dbcme and EDMS.
PLUS
Sector
Cassette
Slot
INB number
User code
INB code
Cable name
Rack #
Left side
Crate: Middle
Slot #
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

8. Protection report: plan for broken cables
The compliant broken cables are in total: 15.
No repair is foreseen for the non compliant ones (12).
Details:
Immediately repairable (splice) Non repairable To be better checked Will not be repaired because that length is not necessary (will be taken as source of connectors instead, in case of splice on installed cables)
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

9. Conclusions
612 (93%) cables have been protected. 564 stored in the final boxes;
Spares and broken cables are classified, ordered and stored in separate boxes.
All cables are in Bld. 226;
people worked very well according to the logistics;
The inspection on used cables revealed 12 failures (7% of the total used) bringing the total unavailable at 31 (4.7%);
Broken cables will be repaired as next step;
The Inventory was systematically updated with comments and error corrections;
In the future: cables will be moved to P5 according to the plan for installation and space available (TBD).
Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007

10. Some pictures Daniel Ricci
Optoelectronics internal report – CERN, 17 August 2007