SCT Services Installation SCT Cables Web page http
SCT Services Installation SCT Cables Web page http: //www-atlas. lbl. gov/ciocio/SCTcables/ Workpackage https: //edms. cern. ch/document/593278/ ID week - 26 September 2006 A. Ciocio 1
SCT Services Type II-III Power Cables PP 3 Type IV Power Cables Fibre Cables DCS Cables Schedule Work Plan/People ID week - 26 September 2006 A. Ciocio 2
Type II-III Power Cables Installation Type III cables Type II cables PPF 1 PPB 1 Type II cables 3 5 Type III cables 7 1 9 15 13 11 Cable trays from Calorimeter Barrel to HS ID week - 26 September 2006 A. Ciocio 3
Type II-III cables Type IV cables from Cryostat from PP 3 Racks - USA side Power Supplies racks in USA 15 Sector 7 Sector 9 Sector 11 Through corridors About 70 meters ID week - 26 September 2006 A. Ciocio 4
Type II-III cables from Cryostat Type IV cables PP 3 Racks - US side from Power Supplies racks in US 15 Sector 3 Through wall holes About 30 meters Sector 15 ID week - 26 September 2006 A. Ciocio 5
Type II/III power cables 4088 cables: installation and testing completed ! 2112 barrel cables & 1976 Endcap cables • 3594 cables (including all the 2112 Barrel) installed between March-July • 494 (EC sector 11&15) installed in the past 3 weeks • Fibre cables go to USA 15 Yield 99% : production defects + bad cables after installation (replaced) ID week - 26 September 2006 A. Ciocio 6
Type II/III cables - THANKS to TC for the fantastic job to complete successfully such complex installation July 18 th 2006 Celebration for the completion of ID Barrel cables installation THANKS to the all SCT institutes for sending their technical staff to work on the preparation of cables and testing THANKS to our PL for supporting through CERN or SCT the more long-term technical staff over the past several months ID week - 26 September 2006 A. Ciocio 7
Type II/III cables in progress • 80% of the cables fixed on cable trays and positioned in PP 3 (TC) • Additional inspection, final verification and repair of damaged wires (yield might go down) • Re-position of EC bundles and clamp on the flange • Test of the whole chain from Cryostat to Power Supply ID week - 26 September 2006 A. Ciocio 8
PP 3 Parts Summary (original) PP 3 units installed in racks Channel Spare units in racks 4261 4088 173 Subracks (30 PP 3 units in a shell) 137 Subracks - special (shells of 30 partially filled with PP 3 and the rest with empty boxes) 9 Subracks – mini (shells of 5 units for spares PP 3 in a full rack) 4 PP 3 units Shells Mini shells Empty boxes ID week - 26 September 2006 A. Ciocio 2 2 4 110 9
PP 3 Assembly & Installation • • Assembly and Installation started last January and was completed in July All type IV were plugged in + type III barrel cable (and EC) of sector 1, 3, 9 Test of whole chain was almost completed for Barrel (US side) Since first installation (January) of PP 3 many problems were found and repairs implemented (see previous reports) – – Insulation between units Sliding units in subracks Failed units (2+) Shorts to the top hat outer shell • During test of whole chain new shorts appeared suggesting that the insulation of the units near the corners of the subracks is not strong enough to resist wearing or puncturing from metallic dust and it can be damaged by just plugging in cables Therefore it was decided to rework ALL subracks in the 17 PP 3 racks ID week - 26 September 2006 A. Ciocio 10
PP 3 Rework • PP 3 subracks containing 30 units to be: – – disassembled cleaned glued properly plastic layers (0. 25 mm polyethylene terephthalate) inserted between all sides of PP 3 units • Disconnection of all cables was completed last week (by the SCT cabling/testing team) – 8000+ cables were hanging by the racks for several days – ~4000 PP 3 units in B 161 • Scott Moncrieff and Ashley French were back on Sept 4 (but leaving next week) to do this rework • Rework has started (last Thursday) but with 2 ½ weeks delay because the material arriving from Australia (new/larger outer shells, polyester, etc. ) was late ID week - 26 September 2006 A. Ciocio 11
Plan for PP 3 Racks Rework Cables Reconnection & Testing Taking into account: • Connector in situ work • PS installation • Time to reconnect • Time to test whole chain ID week - 26 September 2006 A. Ciocio 12
Type IV Cables Installation • US side: – Type IV cables (2044+spares) from PP 3 racks in the ATLAS cavern to PS racks in US 15 • Installed in 2005 (as double harness) • Connectors in situ (March 06) • 9 PS racks (8 for barrel) installed and cables plugged into PS backplanes (July) • USA side: – Type IV from PP 3 to USA 15 installation completed (end of July) – All type IV were connected to PP 3 (17 racks in UX 15) until 1 month ago – extra spare cables just added in several racks (USA side) • All cables tested before and after installation ID week - 26 September 2006 A. Ciocio 13
Type IV Cables – cont’d • Connector in situ (CPE) – All connectors (2100+) in US 15 completed in March – 2+1 CPE techs returned in mid-April for a few weeks • Rework of faulty connectors in US side • Started 2 USA racks but left again because more USA 15 racks were needed to be completed for the full team to operate efficiently – 4 CPE techs returned on August 1 st • Very slow startup - problems with the Company – 5 barrel (or mixed) racks in USA 15 are completed as of today • 2 racks this week (probably one) – The 7 th 8 th USA racks with Barrel cables will be completed during PS installation – The last 3 racks (EC) by Mid/End-October • Testing – All cables are tested as they are plugged in row by row during PS connection – All cables are tested 100 at a time as connectors are made – Test of whole chain was performed on the US side (80 %) in end-July/August • PS installation in USA 15 (see next talk) – – started last week first plug-in/testing Sept 25 Test of whole chain started Test of whole chain (again) in US 15 will follow ID week - 26 September 2006 A. Ciocio 14
PS racks layout priorities for connector in-situ and plug-in ID week - 26 September 2006 A. Ciocio 15
SCT Readout Cable Installation (from Kamil Sedlak) • Start-point: – PPB 1 (Barrel) and PPF 1 (Endcap) • End-point: – SCT racks in USA 15 • 144 cables (+2 spare) • Each cable houses 6 or 8 ribbons with 12 optical fibres each • Ribbons terminated by MT 12 connectors ID week - 26 September 2006 Light duty rigging protecting the bare ribbons. A chain is attached for convenient cable installation. A. Ciocio 16
All SCT Readout Cables Installed • Installation started in March, finished in August 2006. It had to respect the installation sequence of other services/detectors. • Many small problems found during the installation improvisation at the time of installation. No fatal problem found. • One fibre found broken during testing after the installation repaired by splicing in a new ribbon end with the MT 12 connector. The break is here • Barrel and EC cable swap in USA 15 ID week - 26 September 2006 A. Ciocio 17
Testing of the SCT Readout Cables • No acceptance test has been done before the cable installation to avoid spoiling the heavy duty rigging (cables tested by Fujikura). • After the cable installation, two tests were done: – Test of fibre attenuation: • Check that the attenuation losses in the fibre and in the MT connectors are within the specifications (all ribbons in the cables were checked). – TOF for all TTC fibres in cables: • Measurement of the ribbon lengths. • Useful for setting up correct timing for Cosmics and the first data. • All 144 cables tested. All cables OK, although attenuation of 5 ribbons slightly worse than allowed by specifications (see next slide). • Testing was quite slow (~1 cable per hour per shift) and sometimes difficult to organise due to the interference with the installation of other ID services testing outside working hours. • Testing summarized in the EDMS document ATL-IS-QC-0002. ID week - 26 September 2006 A. Ciocio 18
FSI Delivery cables • There are 38 FSI delivery cables (optical cables for delivering and collecting the FSI laser light signal). • The ribbons have no MT 12 connectors – installation was much easier at this stage, except for the need to cut the cables off the heavy drums. • The ribbon connections will be done by splicing later on. • The first batch of the FSI cables (sector 3) too short Serguei Malyukov kindly changed the routing of the FSI delivery cables. Afterwards the lengths were OK for all sectors. • All FSI cables installed already. No testing done. ID week - 26 September 2006 A. Ciocio 19
SCT DCS Cables • Richard Brenner + Lars Lindquist • 128 type II and 40 type IV + 4 canbus • All cables between cavern and USA 15 are installed except for 12 (missing a cable tray – to be arranged with TC) • Interlock cables in US 15 installed • Interlock cables between PS racks in USA 15 and DCS rack in USA 15 installed recently (4 cables x 11 racks) (just before PS installation started) ID week - 26 September 2006 A. Ciocio 20
Schedule (Power Cables & PP 3) Barrel • All Connector in situ + testing • PS crates (Barrel USA 15) • Test of whole chain (see slide #12) mid/end-October mid-October end-October PP 3 & cabling • PP 3 rework • All cables re-plugged into PP 3/PS end-September + 1 week mid/end-October Endcap • 2 (US 15) + 3 (USA 15) PS racks installation November ? (TBD) • Test of whole chain by December/January 07 ID week - 26 September 2006 A. Ciocio 21
Work Plan ID week - 26 September 2006 A. Ciocio 22
PEOPLE 2006 + Freiburg, MPI, Japan, Glasgow, Manchester, Lancaster, UCL… ID week - 26 September 2006 A. Ciocio 23
Final Remarks • PP 3 rework has added extra load to an already dense schedule of activities – Need (crucial!) Ø 3 additional techs/physicist this week • 2 techs to help connecting • 1 person (student OK) to help with the rework in the lab – Need Ø 3 additional techs the first 3 weeks of October • To help connecting • Testing – PP 3 rework and delay of connector in situ will involve more flexibility and additional adjustment of the schedule for • Re-connecting cables and testing the whole chain Ø More help needed in October ID week - 26 September 2006 A. Ciocio 24
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