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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: http://indico.cern.ch/categoryDisplay.py?categId=482. Protection job: objectives.

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optoelectronics internal report 17 august 2007
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:

http://indico.cern.ch/categoryDisplay.py?categId=482

Optoelectronics internal report – CERN, 17 August 2007

slide2

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.

Optoelectronics internal report – CERN, 17 August 2007

slide3

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).

Optoelectronics internal report – CERN, 17 August 2007

slide4

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)

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 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)

Optoelectronics internal report – CERN, 17 August 2007

slide5

Protection report : used cables (global)

Cables removed from TIF: 134

1 with complete delamination on MFS. Repaired with kapton.

1 with MFS connector broken.

1 has one fiber broken @ 1m from MPO;

1 has MFS pins broken;

1 missed a QR on R8 (replaced);

1 has edge of one MFS 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.

Optoelectronics internal report – CERN, 17 August 2007

slide6

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

Optoelectronics internal report – CERN, 17 August 2007

slide7

PLUS

Sector

Cassette

Slot

Cable name

Left side

Crate: Middle

Rack #

Slot #

User code

INB code

INB number

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.

Optoelectronics internal report – CERN, 17 August 2007

slide8

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 repairableTo 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)

Optoelectronics internal report – CERN, 17 August 2007

slide9

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).

Optoelectronics internal report – CERN, 17 August 2007

slide10

Some pictures

Optoelectronics internal report – CERN, 17 August 2007

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