Cabling Status and Plans o Recap o Analogue

Cabling Status and Plans o Recap o Analogue Cables o o Digital Cables o o o Ides of March, MMVII Status Labels and Bundles Delays Status Routing Static Schedule Cabling Status and Plans 1

Cabling Reminder: The Long, the Short and The Digital o 616 Long Analogue Cables o o 776 Short Analogue Cables o o Cabling Status and Plans Mostly Done 1888 Digital Cables o Ides of March, MMVII Detector Responsibility Work in Progress 2

Analogue Cables (~1/4) o o o All produced (plus spares) at end of 2006 All but 160 installed – waiting on LVDS installation BUT. . . Ides of March, MMVII Cabling Status and Plans 3

Status: November Region Number Measured Produced Installed A Upper Direct 96 96 A Lower Direct 84 84 A TCPP to RX 64 64 C Upper Direct 96 96 C Lower Direct 84 84 C TCPP to RX 64 64 A Upper RPPP 64 64 A Lower RPPP 80 80 16 C Upper RPPP 64 64 45 C Lower RPPP 80 80 77 TOTAL 776 (100%) 690 (89%) Ides of March, MMVII Cabling Status and Plans 552 (71%) 4

Status: Current Region Number Measured Produced Installed A Upper Direct 96 96 A Lower Direct 84 84 A TCPP to RX 64 64 C Upper Direct 96 96 C Lower Direct 84 84 C TCPP to RX 64 64 A Upper RPPP 64 64 A Lower RPPP 80 80 80 C Upper RPPP 64 64 64 C Lower RPPP 80 80 80 TOTAL 776 (100%) Ides of March, MMVII Cabling Status and Plans 64 616 (79%) 5

LVDS cables: labels and bundles o 1888 cables plus 80 spares o o Each needs label at both ends Also organised into 252 bundles o o o Each bundle contains 2 -16 cables Bundles constructed with regular Velcro bindings Turns out this was 2 man-month’s work o Thanks to Vasile (sorry, no picture) Ides of March, MMVII Cabling Status and Plans 6

Some LVDS cable bundles Ides of March, MMVII Cabling Status and Plans 7

LVDS cabling: delays o Serious cabling started in mid-February o o Delays due to crate availability o o o A lot later than we’d hoped Or rather ‘final’ crate And cable support mechanics In fact we still have no ‘final’ processor crates o New mechanics for: o o Power supply CMM RTM All backplanes need to be removed and tested/fixed Decided we needed to push on anyway o o But just install cables, no connection yet Some risk – have to estimate necessary lengths Ides of March, MMVII Cabling Status and Plans 8

LVDS cable support: Processor Ides of March, MMVII Cabling Status and Plans 9

LVDS cabling: status o Once started, progress was fast o Two cabling weeks = o o All JEP to A-side cables installed (1/2 JEP) All CP to A-side cables installed (1/2 CP) Except spares Laying requires several ‘hands’ Ides of March, MMVII Cabling Status and Plans 10

LVDS status CP/JEP crate Number Bundles Labelled and Bundled Installed jep 0 384 56 384 192 jep 1 384 56 384 192 cp 0 280 32 280 140 cp 1 280 32 280 140 cp 2 280 32 280 140 cp 3 280 32 280 140 spares 80 12 80 TOTAL 1968 252 1968 (100%) Ides of March, MMVII Cabling Status and Plans Connected 944 (48%) 11

Cable Trays Ides of March, MMVII Cabling Status and Plans 12

LVDS cable routing o All cables are equal (in length: 11 m) o o But not all routes are equal Excess cable ‘lost’ in cable trays and RPPP racks PPr crate JEP crate C side (negative eta) Ides of March, MMVII CP crate A side (positive eta) Cabling Status and Plans 13

Excess cable loop-back Ides of March, MMVII Cabling Status and Plans 14

Static build-up precautions o Safest scheme: o o Remove modules before cables connection Clean connector with air blower? Ground connector before insertion into backplane Before module insertion, insert dummy grounding module o o At each end: PPM and CPM/JEM Requires: o o o Cable grounding device (4? ) Dummy PPM module Dummy CPM/JEM module Ides of March, MMVII Cabling Status and Plans 15

Remaining ‘Cabling’ Schedule o Cabling weeks required o 2 weeks analogue cabling o o 2 weeks LVDS laying o o o Typical duty-cycle is 2 cabling weeks per 5 weeks Finish in 3 -4 months? ? Next cabling weeks: o o o Ides of March, MMVII Maybe does not require ‘specialists’ Say 5 -7 weeks in all o o Uncertain timescale 2 weeks LVDS connection o o Requires 6 people in bursts of activity 1 week crate CP/JEP crate mechanics o o Only 3 people needed (ie main cabling team) 26 th– 30 th March: Mainly Analogue A-side installation? 16 th-20 th April: Begin LVDS C-side installation After. . . to be determined Cabling Status and Plans 16

Conclusions o Schedule for final cabling becoming clearer o o o But shouldn’t forget, we have other cables o o o e. g. over 300 Glinks to RODs And lots of CP/JEP backplane juggling o o Unless we have more surprises (ie delays) Should be mostly finished by end of June? Will add several days work Progress, as ever, due to dedicated work of Simon, Xen and Alex And many other willing volunteers Ides of March, MMVII Cabling Status and Plans 17

Many hands make light work Ides of March, MMVII Cabling Status and Plans 18