id week - 26 september 2006 a. ciocio1 sct services installation sct cables web page

ID week - 26 September 2006 A. Ciocio 1

SCT Services Installation

SCT Cables Web page http://www-atlas.lbl.gov/ciocio/SCTcables/Workpackage https://edms.cern.ch/document/593278/

http://www-atlas.lbl.gov/ciocio/SCTcables/

https://edms.cern.ch/document/593278/


SCT Services

Type II-III Power Cables

PP3

Type IV Power Cables

Fibre Cables

DCS Cables

Schedule

Work Plan/People


Cable trays from Calorimeter Barrel to HS

1

35

7

9

15

1311

Type II cablesPPB1 Type III cablesType II cablesType III cables

Type II-III Power Cables Installation

PPF1


PP3 Racks - USA side

Sector 7

Type IV cables

from

Power Supplies racks in USA15

Type II-III cables

from Cryostat

Sector 9

Through corridorsAbout 70 meters

Sector 11


PP3 Racks - US side

Sector 3

Sector 1

Sector 15

Type II-III cables

from Cryostat

Type IV cables

from

Power Supplies

racks in US15

Through wall holes

About 30 meters


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

Yield 99% : production defects + bad cables after installation (replaced)

• Fibre cables go to USA15


Type II/III cables - THANKS

THANKS to TC for the fantastic job to complete successfully such complex 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

July 18th 2006Celebration for the completion of ID Barrel cables installation


Type II/III cables in progress

• 80% of the cables fixed on cable trays and positioned in PP3 (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


PP3 Parts Summary (original)

PP3 units installed in racks

Channel

Spare units in racks

4261

4088

173

Subracks (30 PP3 units in a shell) 137

Subracks - special

(shells of 30 partially filled with PP3 and the rest with empty boxes)

9

Subracks – mini (shells of 5 units for spares PP3 in a full rack)

4

PP3 units

Shells

Mini shells

Empty boxes

2

2

4

110


PP3 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 PP3 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 PP3 racks


PP3 Rework

• PP3 subracks containing 30 units to be:– disassembled– cleaned– glued properly – plastic layers (0.25 mm polyethylene terephthalate) inserted between all

sides of PP3 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 PP3 units in B161

• 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


Plan for PP3 Racks Rework

Cables Reconnection & Testing

Taking into account:

• Connector in situ work• PS installation• Time to reconnect• Time to test whole chain


Type IV Cables Installation

• US side: – Type IV cables (2044+spares) from PP3 racks in the

ATLAS cavern to PS racks in US15• 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 PP3 to USA15 installation completed (end of July)

– All type IV were connected to PP3 (17 racks in UX15) until 1 month ago

– extra spare cables just added in several racks (USA side)

• All cables tested before and after installation


Type IV Cables – cont’d

• Connector in situ (CPE)– All connectors (2100+) in US15 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 USA15 racks were needed to be

completed for the full team to operate efficiently– 4 CPE techs returned on August 1st

• Very slow startup - problems with the Company– 5 barrel (or mixed) racks in USA15 are completed as of today

• 2 racks this week (probably only one)– The 7th 8th 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 USA15 (see next talk)– started last week– first plug-in/testing Sept 25– Test of whole chain started– Test of whole chain (again) in US15 will follow


PS rackslayout

priorities for connector in-situ and plug-in


SCT Readout Cable Installation(from Kamil Sedlak)

• Start-point: – PPB1 (Barrel) and PPF1 (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 MT12 connectors

Light duty rigging protecting the bare ribbons. A chain is attached for convenient cable installation.


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 MT12 connector.

The break is here

• Barrel and EC cable swap in USA 15


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.


FSI Delivery cables

• There are 38 FSI delivery cables (optical cables for delivering and collecting the FSI laser light signal).

• The ribbons have no MT12 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.


SCT DCS Cables

• Richard Brenner + Lars Lindquist• 128 type II and 40 type IV + 4 canbus• All cables between cavern and USA15 are installed

except for 12

(missing a cable tray – to be arranged with TC)• Interlock cables in US15 installed• Interlock cables between PS racks in USA15 and DCS

rack in USA15 installed recently (4 cables x 11 racks)

(just before PS installation started)


Schedule(Power Cables & PP3)

Barrel

• All Connector in situ + testing mid/end-October • PS crates (Barrel USA15) mid-October• Test of whole chain end-October(see slide #12)

PP3 & cabling

• PP3 rework end-September + 1 week• All cables re-plugged into PP3/PS mid/end-October

Endcap

• 2 (US15) + 3 (USA15) PS racks installation November ? (TBD)• Test of whole chain by December/January 07


Work Plan


PEOPLE

2006

+ Freiburg, MPI, Japan, Glasgow, Manchester, Lancaster, UCL…


Final Remarks• PP3 rework has added extra load to an already

dense schedule of activities– Need (crucial!) 3 additional techs/physicist this week

• 2 techs to help connecting• 1 person (student OK) to help with the rework in the lab

– Need3 additional techs the first 3 weeks of October

• To help connecting

• Testing– PP3 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 chainMore help needed in October

id week - 26 september 2006 a. ciocio1 sct services installation sct cables web page

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